2025 Codeforces 正式比赛题目单
按北京时间整理的 2025 年 Codeforces 正式 rated 个人赛题目单。
2025 Codeforces 正式比赛题目单
本题单按北京时间从早到晚整理 Codeforces 已结束的正式 rated 个人赛。每场比赛保留全部题目和官方题号,不展示算法标签。
共收录 105 场比赛、705 道题。
2025-01-04|Hello 2025
- codeforces 2057A未收录· A. MEX Table · rating
800 - codeforces 2057B未收录· B. Gorilla and the Exam · rating
1000 - codeforces 2057C未收录· C. Trip to the Olympiad · rating
1500 - codeforces 2057D未收录· D. Gifts Order · rating
2000 - codeforces 2057E1未收录· E1. Another Exercise on Graphs (Easy Version) · rating
2300 - codeforces 2057E2未收录· E2. Another Exercise on Graphs (hard version) · rating
2500 - codeforces 2057F未收录· F. Formation · rating
3300 - codeforces 2057G未收录· G. Secret Message · rating
3000 - codeforces 2057H未收录· H. Coffee Break · rating
3500
2025-01-12|Codeforces Round 996 (Div. 2)
- codeforces 2055A未收录· A. Two Frogs · rating
800 - codeforces 2055B未收录· B. Crafting · rating
1000 - codeforces 2055C未收录· C. The Trail · rating
1400 - codeforces 2055D未收录· D. Scarecrow · rating
2000 - codeforces 2055E未收录· E. Haystacks · rating
2800 - codeforces 2055F未收录· F. Cosmic Divide · rating
3200
2025-01-17|Codeforces Round 997 (Div. 2)
- codeforces 2056A未收录· A. Shape Perimeter · rating
800 - codeforces 2056B未收录· B. Find the Permutation · rating
1300 - codeforces 2056C未收录· C. Palindromic Subsequences · rating
1200 - codeforces 2056D未收录· D. Unique Median · rating
2200 - codeforces 2056E未收录· E. Nested Segments · rating
2500 - codeforces 2056F1未收录· F1. Xor of Median (Easy Version) · rating
2700 - codeforces 2056F2未收录· F2. Xor of Median (Hard Version) · rating
3000
2025-01-19|Codeforces Round 998 (Div. 3)
- codeforces 2060A未收录· A. Fibonacciness · rating
800 - codeforces 2060B未收录· B. Farmer John’s Card Game · rating
1000 - codeforces 2060C未收录· C. Game of Mathletes · rating
900 - codeforces 2060D未收录· D. Subtract Min Sort · rating
1100 - codeforces 2060E未收录· E. Graph Composition · rating
1500 - codeforces 2060F未收录· F. Multiplicative Arrays · rating
2200 - codeforces 2060G未收录· G. Bugged Sort · rating
2400
2025-01-20|IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
- codeforces 2061A未收录· A. Kevin and Arithmetic · rating
800 - codeforces 2061B未收录· B. Kevin and Geometry · rating
1100 - codeforces 2061C未收录· C. Kevin and Puzzle · rating
1600 - codeforces 2061D未收录· D. Kevin and Numbers · rating
1600 - codeforces 2061E未收录· E. Kevin and And · rating
2000 - codeforces 2061F1未收录· F1. Kevin and Binary String (Easy Version) · rating
2100 - codeforces 2061F2未收录· F2. Kevin and Binary String (Hard Version) · rating
3500 - codeforces 2061G未收录· G. Kevin and Teams · rating
2900 - codeforces 2061H1未收录· H1. Kevin and Stones (Easy Version) · rating
3500 - codeforces 2061H2未收录· H2. Kevin and Stones (Hard Version) · rating
3500 - codeforces 2061I未收录· I. Kevin and Nivek · rating
3500
2025-01-22|Codeforces Round 1000 (Div. 2)
- codeforces 2063A未收录· A. Minimal Coprime · rating
800 - codeforces 2063B未收录· B. Subsequence Update · rating
1100 - codeforces 2063C未收录· C. Remove Exactly Two · rating
1600 - codeforces 2063D未收录· D. Game With Triangles · rating
2000 - codeforces 2063E未收录· E. Triangle Tree · rating
2300 - codeforces 2063F1未收录· F1. Counting Is Not Fun (Easy Version) · rating
2400 - codeforces 2063F2未收录· F2. Counting Is Not Fun (Hard Version) · rating
2700
2025-01-26|Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)
- codeforces 2062A未收录· A. String · rating
800 - codeforces 2062B未收录· B. Clockwork · rating
900 - codeforces 2062C未收录· C. Cirno and Operations · rating
1200 - codeforces 2062D未收录· D. Balanced Tree · rating
2200 - codeforces 2062E1未收录· E1. The Game (Easy Version) · rating
2000 - codeforces 2062E2未收录· E2. The Game (Hard Version) · rating
3000 - codeforces 2062F未收录· F. Traveling Salescat · rating
2900 - codeforces 2062G未收录· G. Permutation Factory · rating
3500 - codeforces 2062H未收录· H. Galaxy Generator · rating
3500
2025-02-02|Codeforces Round 1002 (Div. 2)
- codeforces 2059A未收录· A. Milya and Two Arrays · rating
800 - codeforces 2059B未收录· B. Cost of the Array · rating
1300 - codeforces 2059C未收录· C. Customer Service · rating
1600 - codeforces 2059D未收录· D. Graph and Graph · rating
1900 - codeforces 2059E1未收录· E1. Stop Gaming (Easy Version) · rating
2500 - codeforces 2059E2未收录· E2. Stop Gaming (Hard Version) · rating
2900
2025-02-09|Codeforces Round 1003 (Div. 4)
- codeforces 2065A未收录· A. Skibidus and Amog’u · rating
800 - codeforces 2065B未收录· B. Skibidus and Ohio · rating
800 - codeforces 2065C1未收录· C1. Skibidus and Fanum Tax (easy version) · rating
1100 - codeforces 2065C2未收录· C2. Skibidus and Fanum Tax (hard version) · rating
1300 - codeforces 2065D未收录· D. Skibidus and Sigma · rating
1200 - codeforces 2065E未收录· E. Skibidus and Rizz · rating
1600 - codeforces 2065F未收录· F. Skibidus and Slay · rating
1700 - codeforces 2065G未收录· G. Skibidus and Capping · rating
1700 - codeforces 2065H未收录· H. Bro Thinks He’s Him · rating
2200
2025-02-11|Codeforces Round 1004 (Div. 1)
- codeforces 2066A未收录· A. Object Identification · rating
1400 - codeforces 2066B未收录· B. White Magic · rating
1900 - codeforces 2066C未收录· C. Bitwise Slides · rating
2300 - codeforces 2066D1未收录· D1. Club of Young Aircraft Builders (easy version) · rating
2400 - codeforces 2066D2未收录· D2. Club of Young Aircraft Builders (hard version) · rating
2900 - codeforces 2066E未收录· E. Tropical Season · rating
3300 - codeforces 2066F未收录· F. Curse · rating
3300
2025-02-11|Codeforces Round 1004 (Div. 2)
- codeforces 2067A未收录· A. Adjacent Digit Sums · rating
800 - codeforces 2067B未收录· B. Two Large Bags · rating
1200 - codeforces 2067C未收录· C. Devyatkino · rating
1500
2025-02-16|Codeforces Round 1005 (Div. 2)
- codeforces 2064A未收录· A. Brogramming Contest · rating
800 - codeforces 2064B未收录· B. Variety is Discouraged · rating
1100 - codeforces 2064C未收录· C. Remove the Ends · rating
1300 - codeforces 2064D未收录· D. Eating · rating
1900 - codeforces 2064E未收录· E. Mycraft Sand Sort · rating
2400 - codeforces 2064F未收录· F. We Be Summing · rating
2600
2025-02-18|Educational Codeforces Round 174 (Rated for Div. 2)
- codeforces 2069A未收录· A. Was there an Array? · rating
800 - codeforces 2069B未收录· B. Set of Strangers · rating
1200 - codeforces 2069C未收录· C. Beautiful Sequence · rating
1500 - codeforces 2069D未收录· D. Palindrome Shuffle · rating
1800 - codeforces 2069E未收录· E. A, B, AB and BA · rating
2300 - codeforces 2069F未收录· F. Graph Inclusion · rating
2800
2025-02-25|Codeforces Round 1006 (Div. 3)
- codeforces 2072A未收录· A. New World, New Me, New Array · rating
800 - codeforces 2072B未收录
- codeforces 2072C未收录· C. Creating Keys for StORages Has Become My Main Skill · rating
1200 - codeforces 2072D未收录· D. For Wizards, the Exam Is Easy, but I Couldn’t Handle It · rating
1300 - codeforces 2072E未收录· E. Do You Love Your Hero and His Two-Hit Multi-Target Attacks? · rating
1500 - codeforces 2072F未收录· F. Goodbye, Banker Life · rating
1700 - codeforces 2072G未收录
2025-02-27|Educational Codeforces Round 175 (Rated for Div. 2)
- codeforces 2070A未收录· A. FizzBuzz Remixed · rating
800 - codeforces 2070B未收录· B. Robot Program · rating
1100 - codeforces 2070C未收录· C. Limited Repainting · rating
1500 - codeforces 2070D未收录· D. Tree Jumps · rating
1600 - codeforces 2070E未收录· E. Game with Binary String · rating
2200 - codeforces 2070F未收录· F. Friends and Pizza · rating
3000
2025-02-28|Codeforces Round 1007 (Div. 2)
- codeforces 2071A未收录· A. The Play Never Ends · rating
800 - codeforces 2071B未收录· B. Perfecto · rating
1100 - codeforces 2071C未收录· C. Trapmigiano Reggiano · rating
1700 - codeforces 2071D1未收录· D1. Infinite Sequence (Easy Version) · rating
1800 - codeforces 2071D2未收录· D2. Infinite Sequence (Hard Version) · rating
2500 - codeforces 2071E未收录· E. LeaFall · rating
2600 - codeforces 2071F未收录· F. Towering Arrays · rating
2700
2025-03-10|Codeforces Round 1008 (Div. 1)
- codeforces 2077A未收录· A. Breach of Faith · rating
1500 - codeforces 2077B未收录· B. Finding OR Sum · rating
1900 - codeforces 2077C未收录· C. Binary Subsequence Value Sum · rating
2300 - codeforces 2077D未收录· D. Maximum Polygon · rating
3100 - codeforces 2077E未收录· E. Another Folding Strip · rating
2700 - codeforces 2077F未收录· F. AND x OR · rating
3300 - codeforces 2077G未收录· G. RGB Walking · rating
3500
2025-03-10|Codeforces Round 1008 (Div. 2)
- codeforces 2078A未收录· A. Final Verdict · rating
800 - codeforces 2078B未收录· B. Vicious Labyrinth · rating
1100 - codeforces 2078D未收录· D. Scammy Game Ad · rating
1800
2025-03-11|Codeforces Round 1009 (Div. 3)
- codeforces 2074A未收录· A. Draw a Square · rating
800 - codeforces 2074B未收录· B. The Third Side · rating
800 - codeforces 2074C未收录· C. XOR and Triangle · rating
1100 - codeforces 2074D未收录· D. Counting Points · rating
1400 - codeforces 2074E未收录· E. Empty Triangle · rating
1600 - codeforces 2074F未收录· F. Counting Necessary Nodes · rating
2000 - codeforces 2074G未收录· G. Game With Triangles: Season 2 · rating
2100
2025-03-17|Educational Codeforces Round 176 (Rated for Div. 2)
- codeforces 2075A未收录· A. To Zero · rating
800 - codeforces 2075B未收录· B. Array Recoloring · rating
1300 - codeforces 2075C未收录· C. Two Colors · rating
1500 - codeforces 2075D未收录· D. Equalization · rating
2000 - codeforces 2075E未收录· E. XOR Matrix · rating
2500 - codeforces 2075F未收录· F. Beautiful Sequence Returns · rating
3000
2025-03-22|Codeforces Round 1011 (Div. 2)
- codeforces 2085A未收录· A. Serval and String Theory · rating
900 - codeforces 2085B未收录· B. Serval and Final MEX · rating
1200 - codeforces 2085C未收录· C. Serval and The Formula · rating
1600 - codeforces 2085D未收录· D. Serval and Kaitenzushi Buffet · rating
2000 - codeforces 2085E未收录· E. Serval and Modulo · rating
2200 - codeforces 2085F1未收录· F1. Serval and Colorful Array (Easy Version) · rating
2600 - codeforces 2085F2未收录· F2. Serval and Colorful Array (Hard Version) · rating
2900
2025-03-23|Codeforces Round 1012 (Div. 1)
- codeforces 2089A未收录· A. Simple Permutation · rating
1700 - codeforces 2089B1未收录· B1. Canteen (Easy Version) · rating
1900 - codeforces 2089B2未收录· B2. Canteen (Hard Version) · rating
2300 - codeforces 2089C1未收录· C1. Key of Like (Easy Version) · rating
2200 - codeforces 2089C2未收录· C2. Key of Like (Hard Version) · rating
3100 - codeforces 2089D未收录· D. Conditional Operators · rating
3200 - codeforces 2089E未收录· E. Black Cat Collapse · rating
3500
2025-03-23|Codeforces Round 1012 (Div. 2)
- codeforces 2090A未收录· A. Treasure Hunt · rating
800 - codeforces 2090B未收录· B. Pushing Balls · rating
1000 - codeforces 2090C未收录· C. Dining Hall · rating
1700
2025-03-25|Codeforces Round 1013 (Div. 3)
- codeforces 2091A未收录· A. Olympiad Date · rating
800 - codeforces 2091B未收录· B. Team Training · rating
800 - codeforces 2091C未收录· C. Combination Lock · rating
1000 - codeforces 2091D未收录· D. Place of the Olympiad · rating
1200 - codeforces 2091E未收录· E. Interesting Ratio · rating
1300 - codeforces 2091F未收录· F. Igor and Mountain · rating
1800 - codeforces 2091G未收录· G. Gleb and Boating · rating
2300
2025-03-29|Codeforces Round 1014 (Div. 2)
- codeforces 2092A未收录· A. Kamilka and the Sheep · rating
800 - codeforces 2092B未收录· B. Lady Bug · rating
1000 - codeforces 2092C未收录· C. Asuna and the Mosquitoes · rating
1200 - codeforces 2092D未收录· D. Mishkin Energizer · rating
1800 - codeforces 2092E未收录· E. She knows… · rating
2100 - codeforces 2092F未收录· F. Andryusha and CCB · rating
2900
2025-04-03|Educational Codeforces Round 177 (Rated for Div. 2)
- codeforces 2086A未收录· A. Cloudberry Jam · rating
800 - codeforces 2086B未收录· B. Large Array and Segments · rating
1100 - codeforces 2086C未收录· C. Disappearing Permutation · rating
1300 - codeforces 2086D未收录· D. Even String · rating
1700 - codeforces 2086E未收录· E. Zebra-like Numbers · rating
2400 - codeforces 2086F未收录· F. Online Palindrome · rating
3000
2025-04-05|Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)
- codeforces 2084A未收录· A. Max and Mod · rating
800 - codeforces 2084B未收录· B. MIN = GCD · rating
1100 - codeforces 2084C未收录· C. You Soared Afar With Grace · rating
1400 - codeforces 2084D未收录· D. Arcology On Permafrost · rating
1600 - codeforces 2084E未收录· E. Blossom · rating
2400 - codeforces 2084F未收录· F. Skyscape · rating
2900 - codeforces 2084G1未收录· G1. Wish Upon a Satellite (Easy Version) · rating
2600 - codeforces 2084G2未收录· G2. Wish Upon a Satellite (Hard Version) · rating
3500 - codeforces 2084H未收录· H. Turtle and Nediam 2 · rating
3500
2025-04-08|Codeforces Round 1016 (Div. 3)
- codeforces 2093A未收录· A. Ideal Generator · rating
800 - codeforces 2093B未收录· B. Expensive Number · rating
900 - codeforces 2093C未收录· C. Simple Repetition · rating
1000 - codeforces 2093D未收录· D. Skibidi Table · rating
1400 - codeforces 2093E未收录· E. Min Max MEX · rating
1500 - codeforces 2093F未收录· F. Hackers and Neural Networks · rating
1800 - codeforces 2093G未收录· G. Shorten the Array · rating
1900
2025-04-13|Codeforces Round 1017 (Div. 4)
- codeforces 2094A未收录· A. Trippi Troppi · rating
800 - codeforces 2094B未收录· B. Bobritto Bandito · rating
800 - codeforces 2094C未收录· C. Brr Brrr Patapim · rating
900 - codeforces 2094D未收录· D. Tung Tung Sahur · rating
1100 - codeforces 2094E未收录· E. Boneca Ambalabu · rating
1200 - codeforces 2094F未收录· F. Trulimero Trulicina · rating
1600 - codeforces 2094G未收录· G. Chimpanzini Bananini · rating
1700 - codeforces 2094H未收录· H. La Vaca Saturno Saturnita · rating
1900
2025-04-19|Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)
- codeforces 2096A未收录· A. Wonderful Sticks · rating
800 - codeforces 2096B未收录· B. Wonderful Gloves · rating
1100 - codeforces 2096C未收录· C. Wonderful City · rating
1700 - codeforces 2096D未收录· D. Wonderful Lightbulbs · rating
2000 - codeforces 2096E未收录· E. Wonderful Teddy Bears · rating
2400 - codeforces 2096F未收录· F. Wonderful Impostors · rating
3100 - codeforces 2096G未收录· G. Wonderful Guessing Game · rating
3200 - codeforces 2096H未收录· H. Wonderful XOR Problem · rating
3200
2025-04-21|Codeforces Round 1019 (Div. 2)
- codeforces 2103A未收录· A. Common Multiple · rating
800 - codeforces 2103B未收录· B. Binary Typewriter · rating
1100 - codeforces 2103C未收录· C. Median Splits · rating
1600 - codeforces 2103D未收录· D. Local Construction · rating
2000 - codeforces 2103E未收录· E. Keep the Sum · rating
2600 - codeforces 2103F未收录· F. Maximize Nor · rating
2600
2025-04-24|Codeforces Round 1020 (Div. 3)
- codeforces 2106A未收录· A. Dr. TC · rating
800 - codeforces 2106B未收录· B. St. Chroma · rating
900 - codeforces 2106C未收录· C. Cherry Bomb · rating
1000 - codeforces 2106D未收录· D. Flower Boy · rating
1500 - codeforces 2106E未收录· E. Wolf · rating
1800 - codeforces 2106F未收录· F. Goblin · rating
1900 - codeforces 2106G1未收录· G1. Baudelaire (easy version) · rating
2200 - codeforces 2106G2未收录· G2. Baudelaire (hard version) · rating
2500
2025-04-26|Codeforces Round 1021 (Div. 1)
- codeforces 2097A未收录· A. Sports Betting · rating
1400 - codeforces 2097B未收录· B. Baggage Claim · rating
2300 - codeforces 2097C未收录· C. Bermuda Triangle · rating
2400 - codeforces 2097D未收录· D. Homework · rating
2800 - codeforces 2097E未收录· E. Clearing the Snowdrift · rating
3100 - codeforces 2097F未收录· F. Lost Luggage · rating
3500
2025-04-26|Codeforces Round 1021 (Div. 2)
- codeforces 2098A未收录· A. Vadim’s Collection · rating
800 - codeforces 2098B未收录· B. Sasha and the Apartment Purchase · rating
1400
2025-04-28|Educational Codeforces Round 178 (Rated for Div. 2)
- codeforces 2104A未收录· A. Three Decks · rating
800 - codeforces 2104B未收录· B. Move to the End · rating
1000 - codeforces 2104C未收录· C. Card Game · rating
1100 - codeforces 2104D未收录· D. Array and GCD · rating
1400 - codeforces 2104E未收录· E. Unpleasant Strings · rating
1700 - codeforces 2104F未收录· F. Numbers and Strings · rating
2600 - codeforces 2104G未收录· G. Modulo 3 · rating
2700
2025-05-01|Codeforces Round 1022 (Div. 2)
- codeforces 2108A未收录· A. Permutation Warm-Up · rating
800 - codeforces 2108B未收录· B. SUMdamental Decomposition · rating
1300 - codeforces 2108C未收录· C. Neo’s Escape · rating
1500 - codeforces 2108D未收录· D. Needle in a Numstack · rating
2200 - codeforces 2108E未收录· E. Spruce Dispute · rating
2600 - codeforces 2108F未收录· F. Fallen Towers · rating
2900
2025-05-05|Codeforces Round 1023 (Div. 2)
- codeforces 2107A未收录· A. LRC and VIP · rating
800 - codeforces 2107B未收录· B. Apples in Boxes · rating
1100 - codeforces 2107C未收录· C. Maximum Subarray Sum · rating
1500 - codeforces 2107D未收录· D. Apple Tree Traversing · rating
2100 - codeforces 2107E未收录· E. Ain and Apple Tree · rating
2600 - codeforces 2107F1未收录· F1. Cycling (Easy Version) · rating
2300 - codeforces 2107F2未收录· F2. Cycling (Hard Version) · rating
2800
2025-05-11|Codeforces Round 1024 (Div. 1)
- codeforces 2101A未收录· A. Mex in the Grid · rating
1300 - codeforces 2101B未收录· B. Quartet Swapping · rating
1800 - codeforces 2101C未收录· C. 23 Kingdom · rating
2200 - codeforces 2101D未收录· D. Mani and Segments · rating
2500 - codeforces 2101E未收录· E. Kia Bakes a Cake · rating
3100 - codeforces 2101F未收录· F. Shoo Shatters the Sunshine · rating
3300
2025-05-11|Codeforces Round 1024 (Div. 2)
- codeforces 2102A未收录· A. Dinner Time · rating
900 - codeforces 2102B未收录· B. The Picky Cat · rating
900
2025-05-17|Codeforces Round 1025 (Div. 2)
- codeforces 2109A未收录· A. It’s Time To Duel · rating
800 - codeforces 2109B未收录· B. Slice to Survive · rating
1200 - codeforces 2109C1未收录· C1. Hacking Numbers (Easy Version) · rating
1500 - codeforces 2109C2未收录· C2. Hacking Numbers (Medium Version) · rating
1700 - codeforces 2109C3未收录· C3. Hacking Numbers (Hard Version) · rating
2600 - codeforces 2109D未收录· D. D/D/D · rating
1900 - codeforces 2109E未收录· E. Binary String Wowee · rating
2400 - codeforces 2109F未收录· F. Penguin Steps · rating
3000
2025-05-24|Codeforces Round 1026 (Div. 2)
- codeforces 2110A未收录· A. Fashionable Array · rating
800 - codeforces 2110B未收录· B. Down with Brackets · rating
900 - codeforces 2110C未收录· C. Racing · rating
1400 - codeforces 2110D未收录· D. Fewer Batteries · rating
1700 - codeforces 2110E未收录· E. Melody · rating
2300 - codeforces 2110F未收录· F. Faculty · rating
2400
2025-05-26|Codeforces Round 1027 (Div. 3)
- codeforces 2114A未收录· A. Square Year · rating
800 - codeforces 2114B未收录· B. Not Quite a Palindromic String · rating
900 - codeforces 2114C未收录· C. Need More Arrays · rating
1000 - codeforces 2114D未收录· D. Come a Little Closer · rating
1400 - codeforces 2114E未收录· E. Kirei Attacks the Estate · rating
1400 - codeforces 2114F未收录· F. Small Operations · rating
2000 - codeforces 2114G未收录· G. Build an Array · rating
2200
2025-05-31|Codeforces Round 1028 (Div. 1)
- codeforces 2115A未收录· A. Gellyfish and Flaming Peony · rating
1500 - codeforces 2115B未收录· B. Gellyfish and Camellia Japonica · rating
2100 - codeforces 2115C未收录· C. Gellyfish and Eternal Violet · rating
2700 - codeforces 2115D未收录· D. Gellyfish and Forget-Me-Not · rating
2900 - codeforces 2115E未收录· E. Gellyfish and Mayflower · rating
3500 - codeforces 2115F1未收录· F1. Gellyfish and Lycoris Radiata (Easy Version) · rating
3500 - codeforces 2115F2未收录· F2. Gellyfish and Lycoris Radiata (Hard Version) · rating
3500
2025-05-31|Codeforces Round 1028 (Div. 2)
- codeforces 2116A未收录· A. Gellyfish and Tricolor Pansy · rating
800 - codeforces 2116B未收录· B. Gellyfish and Baby’s Breath · rating
1300
2025-06-03|Educational Codeforces Round 179 (Rated for Div. 2)
- codeforces 2111A未收录· A. Energy Crystals · rating
800 - codeforces 2111B未收录· B. Fibonacci Cubes · rating
1100 - codeforces 2111C未收录· C. Equal Values · rating
1100 - codeforces 2111D未收录· D. Creating a Schedule · rating
1400 - codeforces 2111E未收录· E. Changing the String · rating
1900 - codeforces 2111F未收录· F. Puzzle · rating
2400 - codeforces 2111G未收录· G. Divisible Subarrays · rating
2900
2025-06-08|Codeforces Round 1029 (Div. 3)
- codeforces 2117A未收录· A. False Alarm · rating
800 - codeforces 2117B未收录· B. Shrink · rating
800 - codeforces 2117C未收录· C. Cool Partition · rating
1200 - codeforces 2117D未收录· D. Retaliation · rating
1200 - codeforces 2117E未收录· E. Lost Soul · rating
1600 - codeforces 2117F未收录· F. Wildflower · rating
1800 - codeforces 2117G未收录· G. Omg Graph · rating
1900 - codeforces 2117H未收录· H. Incessant Rain · rating
2500
2025-06-12|Codeforces Round 1030 (Div. 2)
- codeforces 2118A未收录· A. Equal Subsequences · rating
800 - codeforces 2118B未收录· B. Make It Permutation · rating
1200 - codeforces 2118C未收录· C. Make It Beautiful · rating
1300 - codeforces 2118D1未收录· D1. Red Light, Green Light (Easy version) · rating
1700 - codeforces 2118D2未收录· D2. Red Light, Green Light (Hard version) · rating
2200 - codeforces 2118E未收录· E. Grid Coloring · rating
2400 - codeforces 2118F未收录· F. Shifts and Swaps · rating
3100
2025-06-15|Codeforces Round 1031 (Div. 2)
- codeforces 2113A未收录· A. Shashliks · rating
800 - codeforces 2113B未收录· B. Good Start · rating
1200 - codeforces 2113C未收录· C. Smilo and Minecraft · rating
1700 - codeforces 2113D未收录· D. Cheater · rating
2200 - codeforces 2113E未收录· E. From Kazan with Love · rating
2800 - codeforces 2113F未收录· F. Two Arrays · rating
2500
2025-06-17|Codeforces Round 1032 (Div. 3)
- codeforces 2121A未收录· A. Letter Home · rating
800 - codeforces 2121B未收录· B. Above the Clouds · rating
800 - codeforces 2121C未收录· C. Those Who Are With Us · rating
1200 - codeforces 2121D未收录· D. 1709 · rating
1300 - codeforces 2121E未收录· E. Sponsor of Your Problems · rating
1500 - codeforces 2121F未收录· F. Yamakasi · rating
1800 - codeforces 2121G未收录· G. Gangsta · rating
1900 - codeforces 2121H未收录· H. Ice Baby · rating
2300
2025-06-21|Codeforces Round 1033 (Div. 2) and CodeNite 2025
- codeforces 2120A未收录· A. Square of Rectangles · rating
800 - codeforces 2120B未收录· B. Square Pool · rating
1000 - codeforces 2120C未收录· C. Divine Tree · rating
1400 - codeforces 2120D未收录· D. Matrix game · rating
1800 - codeforces 2120E未收录· E. Lanes of Cars · rating
2300 - codeforces 2120F未收录· F. Superb Graphs · rating
2600 - codeforces 2120G未收录· G. Eulerian Line Graph · rating
3000
2025-06-23|Educational Codeforces Round 180 (Rated for Div. 2)
- codeforces 2112A未收录· A. Race · rating
800 - codeforces 2112B未收录· B. Shrinking Array · rating
1100 - codeforces 2112C未收录· C. Coloring Game · rating
1300 - codeforces 2112D未收录· D. Reachability and Tree · rating
1700 - codeforces 2112E未收录· E. Tree Colorings · rating
2200 - codeforces 2112F未收录· F. Variables and Operations · rating
2800
2025-07-01|Codeforces Round 1034 (Div. 3)
- codeforces 2123A未收录· A. Blackboard Game · rating
800 - codeforces 2123B未收录· B. Tournament · rating
800 - codeforces 2123C未收录· C. Prefix Min and Suffix Max · rating
1000 - codeforces 2123D未收录· D. Binary String Battle · rating
1200 - codeforces 2123E未收录· E. MEX Count · rating
1400 - codeforces 2123F未收录· F. Minimize Fixed Points · rating
1700 - codeforces 2123G未收录· G. Modular Sorting · rating
2100
2025-07-05|Codeforces Round 1035 (Div. 2)
- codeforces 2119A未收录· A. Add or XOR · rating
800 - codeforces 2119B未收录· B. Line Segments · rating
1200 - codeforces 2119C未收录· C. A Good Problem · rating
1300 - codeforces 2119D未收录· D. Token Removing · rating
2100 - codeforces 2119E未收录· E. And Constraint · rating
2600 - codeforces 2119F未收录· F. Volcanic Eruptions · rating
3300
2025-07-06|EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2)
- codeforces 2124A未收录· A. Deranged Deletions · rating
800 - codeforces 2124B未收录· B. Minimise Sum · rating
1000 - codeforces 2124C未收录· C. Subset Multiplication · rating
1300 - codeforces 2124D未收录· D. Make a Palindrome · rating
1700 - codeforces 2124E未收录· E. Make it Zero · rating
2100 - codeforces 2124F1未收录· F1. Appending Permutations (Easy Version) · rating
2300 - codeforces 2124F2未收录· F2. Appending Permutations (Hard Version) · rating
2800 - codeforces 2124G未收录· G. Maximise Sum · rating
3200 - codeforces 2124H未收录· H. Longest Good Subsequence · rating
3400 - codeforces 2124I未收录· I. Lexicographic Partition · rating
3500
2025-07-17|Codeforces Round 1037 (Div. 3)
- codeforces 2126A未收录· A. Only One Digit · rating
800 - codeforces 2126B未收录· B. No Casino in the Mountains · rating
800 - codeforces 2126C未收录· C. I Will Definitely Make It · rating
1100 - codeforces 2126D未收录· D. This Is the Last Time · rating
1200 - codeforces 2126E未收录· E. G-C-D, Unlucky! · rating
1400 - codeforces 2126F未收录· F. 1-1-1, Free Tree! · rating
2000 - codeforces 2126G1未收录· G1. Big Wins! (easy version) · rating
2200 - codeforces 2126G2未收录· G2. Big Wins! (hard version) · rating
2400
2025-07-19|Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)
- codeforces 2122A未收录· A. Greedy Grid · rating
800 - codeforces 2122B未收录· B. Pile Shuffling · rating
1100 - codeforces 2122C未收录· C. Manhattan Pairs · rating
1700 - codeforces 2122D未收录· D. Traffic Lights · rating
2400 - codeforces 2122E未收录· E. Greedy Grid Counting · rating
2600 - codeforces 2122F未收录· F. Colorful Polygon · rating
3400 - codeforces 2122G未收录· G. Tree Parking · rating
3300
2025-07-22|Educational Codeforces Round 181 (Rated for Div. 2)
- codeforces 2125A未收录· A. Difficult Contest · rating
800 - codeforces 2125B未收录· B. Left and Down · rating
900 - codeforces 2125C未收录· C. Count Good Numbers · rating
1100 - codeforces 2125D未收录· D. Segments Covering · rating
1600 - codeforces 2125E未收录· E. Sets of Complementary Sums · rating
2500 - codeforces 2125F未收录· F. Timofey and Docker · rating
3000
2025-07-27|Codeforces Round 1039 (Div. 2)
- codeforces 2128A未收录· A. Recycling Center · rating
800 - codeforces 2128B未收录· B. Deque Process · rating
1100 - codeforces 2128C未收录· C. Leftmost Below · rating
1200 - codeforces 2128D未收录· D. Sum of LDS · rating
1600 - codeforces 2128E1未收录· E1. Submedians (Easy Version) · rating
1900 - codeforces 2128E2未收录· E2. Submedians (Hard Version) · rating
2600 - codeforces 2128F未收录· F. Strict Triangle · rating
3200
2025-07-31|Codeforces Round 1040 (Div. 1)
- codeforces 2129A未收录· A. Double Perspective · rating
1300 - codeforces 2129B未收录· B. Stay or Mirror · rating
1600 - codeforces 2129C1未收录· C1. Interactive RBS (Easy Version) · rating
1900 - codeforces 2129C2未收录· C2. Interactive RBS (Medium Version) · rating
2000 - codeforces 2129C3未收录· C3. Interactive RBS (Hard Version) · rating
2300 - codeforces 2129D未收录· D. Permutation Blackhole · rating
2600 - codeforces 2129E未收录· E. Induced Subgraph Queries · rating
3000 - codeforces 2129F1未收录· F1. Top-K Tracker (Easy Version) · rating
3500 - codeforces 2129F2未收录· F2. Top-K Tracker (Hard Version) · rating
3500
2025-07-31|Codeforces Round 1040 (Div. 2)
- codeforces 2130A未收录· A. Submission is All You Need · rating
800 - codeforces 2130B未收录· B. Pathless · rating
1100
2025-08-07|Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)
- codeforces 2127A未收录· A. Mix Mex Max · rating
800 - codeforces 2127B未收录· B. Hamiiid, Haaamid… Hamid? · rating
1300 - codeforces 2127C未收录· C. Trip Shopping · rating
1400 - codeforces 2127D未收录· D. Root was Built by Love, Broken by Destiny · rating
1800 - codeforces 2127E未收录· E. Ancient Tree · rating
2100 - codeforces 2127F未收录· F. Hamed and AghaBalaSar · rating
2800 - codeforces 2127G1未收录· G1. Inter Active (Easy Version) · rating
3400 - codeforces 2127G2未收录· G2. Inter Active (Hard Version) · rating
3500 - codeforces 2127H未收录· H. 23 Rises Again · rating
3100
2025-08-10|Codeforces Round 1042 (Div. 3)
- codeforces 2131A未收录· A. Lever · rating
800 - codeforces 2131B未收录· B. Alternating Series · rating
800 - codeforces 2131C未收录· C. Make it Equal · rating
1100 - codeforces 2131D未收录· D. Arboris Contractio · rating
1400 - codeforces 2131E未收录· E. Adjacent XOR · rating
1400 - codeforces 2131F未收录· F. Unjust Binary Life · rating
1900 - codeforces 2131G未收录· G. Wafu! · rating
2000 - codeforces 2131H未收录· H. Sea, You & copriMe · rating
2600
2025-08-21|Codeforces Round 1043 (Div. 3)
- codeforces 2132A未收录· A. Homework · rating
800 - codeforces 2132B未收录· B. The Secret Number · rating
900 - codeforces 2132C1未收录· C1. The Cunning Seller (easy version) · rating
1000 - codeforces 2132C2未收录· C2. The Cunning Seller (hard version) · rating
1400 - codeforces 2132D未收录· D. From 1 to Infinity · rating
1600 - codeforces 2132E未收录· E. Arithmetics Competition · rating
1700 - codeforces 2132F未收录· F. Rada and the Chamomile Valley · rating
2100 - codeforces 2132G未收录· G. Famous Choreographer · rating
2600
2025-08-24|Codeforces Round 1044 (Div. 2)
- codeforces 2133A未收录· A. Redstone? · rating
800 - codeforces 2133B未收录· B. Villagers · rating
800 - codeforces 2133C未收录· C. The Nether · rating
1400 - codeforces 2133D未收录· D. Chicken Jockey · rating
1900 - codeforces 2133E未收录· E. I Yearned For The Mines · rating
2500 - codeforces 2133F未收录· F. Flint and Steel · rating
3000
2025-08-26|Codeforces Round 1045 (Div. 2)
- codeforces 2134A未收录· A. Painting With Two Colors · rating
800 - codeforces 2134B未收录· B. Add 0 or K · rating
1200 - codeforces 2134C未收录· C. Even Larger · rating
1200 - codeforces 2134D未收录· D. Sliding Tree · rating
2300 - codeforces 2134E未收录· E. Power Boxes · rating
2300 - codeforces 2134F未收录· F. Permutation Oddness · rating
2900
2025-08-28|Codeforces Round 1046 (Div. 1)
- codeforces 2135A未收录· A. Against the Difference · rating
1200 - codeforces 2135B未收录· B. For the Champion · rating
1700 - codeforces 2135C未收录· C. By the Assignment · rating
2000 - codeforces 2135D1未收录· D1. From the Unknown (Easy Version) · rating
2100 - codeforces 2135D2未收录· D2. From the Unknown (Hard Version) · rating
2500 - codeforces 2135E1未收录· E1. Beyond the Palindrome (Easy Version) · rating
3300 - codeforces 2135E2未收录· E2. Beyond the Palindrome (Hard Version) · rating
3500 - codeforces 2135F未收录· F. To the Infinity · rating
3500
2025-08-28|Codeforces Round 1046 (Div. 2)
- codeforces 2136A未收录· A. In the Dream · rating
800 - codeforces 2136B未收录· B. Like the Bitset · rating
900
2025-09-07|Codeforces Round 1047 (Div. 3)
- codeforces 2137A未收录· A. Collatz Conjecture · rating
800 - codeforces 2137B未收录· B. Fun Permutation · rating
900 - codeforces 2137C未收录· C. Maximum Even Sum · rating
1100 - codeforces 2137D未收录· D. Replace with Occurrences · rating
1200 - codeforces 2137E未收录· E. Mexification · rating
1500 - codeforces 2137F未收录· F. Prefix Maximum Invariance · rating
1900 - codeforces 2137G未收录· G. Cry Me a River · rating
2200
2025-09-09|Codeforces Round 1049 (Div. 2)
- codeforces 2140A未收录· A. Shift Sort · rating
800 - codeforces 2140B未收录· B. Another Divisibility Problem · rating
900 - codeforces 2140C未收录· C. Ultimate Value · rating
1500 - codeforces 2140D未收录· D. A Cruel Segment’s Thesis · rating
2000 - codeforces 2140E1未收录· E1. Prime Gaming (Easy Version) · rating
2200 - codeforces 2140E2未收录· E2. Prime Gaming (Hard Version) · rating
2500 - codeforces 2140F未收录· F. Sum Minimisation · rating
2900
2025-09-13|Codeforces Round 1050 (Div. 4)
- codeforces 2148A未收录· A. Sublime Sequence · rating
800 - codeforces 2148B未收录· B. Lasers · rating
800 - codeforces 2148C未收录· C. Pacer · rating
900 - codeforces 2148D未收录· D. Destruction of the Dandelion Fields · rating
1000 - codeforces 2148E未收录· E. Split · rating
1200 - codeforces 2148F未收录· F. Gravity Falls · rating
1800 - codeforces 2148G未收录· G. Farmer John’s Last Wish · rating
1900
2025-09-15|Educational Codeforces Round 182 (Rated for Div. 2)
- codeforces 2144A未收录· A. Cut the Array · rating
800 - codeforces 2144B未收录· B. Maximum Cost Permutation · rating
1000 - codeforces 2144C未收录· C. Non-Descending Arrays · rating
1300 - codeforces 2144D未收录· D. Price Tags · rating
1800 - codeforces 2144E1未收录· E1. Looking at Towers (easy version) · rating
2200 - codeforces 2144E2未收录· E2. Looking at Towers (difficult version) · rating
2500 - codeforces 2144F未收录· F. Bracket Groups · rating
2700
2025-09-17|Codeforces Round 1051 (Div. 2)
- codeforces 2143A未收录· A. All Lengths Subtraction · rating
800 - codeforces 2143B未收录· B. Discounts · rating
1000 - codeforces 2143C未收录· C. Max Tree · rating
1300 - codeforces 2143D1未收录· D1. Inversion Graph Coloring (Easy Version) · rating
1800 - codeforces 2143D2未收录· D2. Inversion Graph Coloring (Hard Version) · rating
2200 - codeforces 2143E未收录· E. Make Good · rating
2400 - codeforces 2143F未收录· F. Increasing Xor · rating
2700
2025-09-20|Codeforces Global Round 29 (Div. 1 + Div. 2)
- codeforces 2147A未收录· A. Shortest Increasing Path · rating
800 - codeforces 2147B未收录· B. Multiple Construction · rating
1000 - codeforces 2147C未收录· C. Rabbits · rating
1500 - codeforces 2147D未收录· D. Game on Array · rating
1700 - codeforces 2147E未收录· E. Maximum OR Popcount · rating
2300 - codeforces 2147F未收录· F. Exchange Queries · rating
2800 - codeforces 2147G未收录· G. Modular Tetration · rating
3100 - codeforces 2147H未收录· H. Maxflow GCD Coloring · rating
3500 - codeforces 2147I1未收录· I1. Longest Increasing Path (Easy Version) · rating
3300 - codeforces 2147I2未收录· I2. Longest Increasing Path (Hard Version) · rating
3500
2025-09-21|Codeforces Round 1052 (Div. 2)
- codeforces 2146A未收录· A. Equal Occurrences · rating
800 - codeforces 2146B未收录· B. Merging the Sets · rating
1100 - codeforces 2146C未收录· C. Wrong Binary Search · rating
1300 - codeforces 2146D1未收录· D1. Max Sum OR (Easy Version) · rating
1500 - codeforces 2146D2未收录· D2. Max Sum OR (Hard Version) · rating
2000 - codeforces 2146E未收录· E. Yet Another MEX Problem · rating
2300 - codeforces 2146F未收录· F. Bubble Sort · rating
2900
2025-09-24|Codeforces Round 1053 (Div. 1)
- codeforces 2150A未收录· A. Incremental Path · rating
1300 - codeforces 2150B未收录· B. Grid Counting · rating
1700 - codeforces 2150C未收录· C. Limited Edition Shop · rating
2100 - codeforces 2150D未收录· D. Attraction Theory · rating
2700 - codeforces 2150E1未收录· E1. Hidden Single (Version 1) · rating
2600 - codeforces 2150E2未收录· E2. Hidden Single (Version 2) · rating
2800 - codeforces 2150F未收录· F. Cycle Closing · rating
3000 - codeforces 2150G未收录· G. Counting Is Fun: The Finale · rating
3500
2025-09-24|Codeforces Round 1053 (Div. 2)
- codeforces 2151A未收录· A. Incremental Subarray · rating
800 - codeforces 2151C未收录· C. Incremental Stay · rating
1400
2025-09-25|Codeforces Round 1054 (Div. 3)
- codeforces 2149A未收录· A. Be Positive · rating
800 - codeforces 2149B未收录· B. Unconventional Pairs · rating
800 - codeforces 2149C未收录· C. MEX rose · rating
900 - codeforces 2149D未收录· D. A and B · rating
1200 - codeforces 2149E未收录· E. Hidden Knowledge of the Ancients · rating
1500 - codeforces 2149F未收录· F. Nezuko in the Clearing · rating
1900 - codeforces 2149G未收录· G. Buratsuta 3 · rating
2100
2025-10-03|Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)
- codeforces 2152A未收录· A. Increase or Smash · rating
800 - codeforces 2152B未收录· B. Catching the Krug · rating
1300 - codeforces 2152C未收录· C. Triple Removal · rating
1400 - codeforces 2152D未收录· D. Division Versus Addition · rating
1700 - codeforces 2152E未收录· E. Monotone Subsequence · rating
2100 - codeforces 2152F未收录· F. Triple Attack · rating
2500 - codeforces 2152G未收录· G. Query Jungle · rating
2900 - codeforces 2152H1未收录· H1. Victorious Coloring (Easy Version) · rating
2900 - codeforces 2152H2未收录· H2. Victorious Coloring (Hard Version) · rating
3500
2025-10-06|Codeforces Round 1056 (Div. 2)
- codeforces 2155A未收录· A. El fucho · rating
800 - codeforces 2155B未收录· B. Abraham’s Great Escape · rating
1100 - codeforces 2155C未收录· C. The Ancient Wizards’ Capes · rating
1500 - codeforces 2155D未收录· D. Batteries · rating
1800 - codeforces 2155E未收录· E. Mimo & Yuyu · rating
2200 - codeforces 2155F未收录· F. Juan’s Colorful Tree · rating
2800
2025-10-06|Educational Codeforces Round 183 (Rated for Div. 2)
- codeforces 2145A未收录· A. Candies for Nephews · rating
800 - codeforces 2145B未收录· B. Deck of Cards · rating
1000 - codeforces 2145C未收录· C. Monocarp’s String · rating
1300 - codeforces 2145D未收录· D. Inversion Value of a Permutation · rating
1800 - codeforces 2145E未收录· E. Predicting Popularity · rating
2100 - codeforces 2145F未收录· F. Long Journey · rating
2500 - codeforces 2145G未收录· G. Cost of Coloring · rating
2900
2025-10-10|Codeforces Round 1057 (Div. 2)
- codeforces 2153A未收录· A. Circle of Apple Trees · rating
800 - codeforces 2153B未收录· B. Bitwise Reversion · rating
800 - codeforces 2153C未收录· C. Symmetrical Polygons · rating
1500 - codeforces 2153D未收录· D. Not Alone · rating
1800 - codeforces 2153E未收录· E. Zero Trailing Factorial · rating
2400 - codeforces 2153F未收录· F. Odd Queries on Odd Array · rating
2900
2025-10-12|Codeforces Round 1058 (Div. 1)
- codeforces 2159A未收录· A. MAD Interactive Problem · rating
1700 - codeforces 2159B未收录· B. Rectangles · rating
2100 - codeforces 2159C未收录· C. Twin Polynomials · rating
2300 - codeforces 2159D1未收录· D1. Inverse Minimum Partition (Easy Version) · rating
2500 - codeforces 2159D2未收录· D2. Inverse Minimum Partition (Hard Version) · rating
3200 - codeforces 2159E未收录· E. Super-Short-Polynomial-San · rating
3500 - codeforces 2159F未收录· F. Grand Finale: Snakes · rating
3500
2025-10-12|Codeforces Round 1058 (Div. 2)
- codeforces 2160A未收录· A. MEX Partition · rating
800 - codeforces 2160B未收录· B. Distinct Elements · rating
1100 - codeforces 2160C未收录· C. Reverse XOR · rating
1300
2025-10-17|Codeforces Round 1059 (Div. 3)
- codeforces 2162A未收录· A. Beautiful Average · rating
800 - codeforces 2162B未收录· B. Beautiful String · rating
1000 - codeforces 2162C未收录· C. Beautiful XOR · rating
1100 - codeforces 2162D未收录· D. Beautiful Permutation · rating
1400 - codeforces 2162E未收录· E. Beautiful Palindromes · rating
1600 - codeforces 2162F未收录· F. Beautiful Intervals · rating
2100 - codeforces 2162G未收录· G. Beautiful Tree · rating
2200 - codeforces 2162H未收录· H. Beautiful Problem · rating
2900
2025-10-19|Codeforces Round 1060 (Div. 2)
- codeforces 2154A未收录· A. Notelock · rating
800 - codeforces 2154B未收录· B. Make it Zigzag · rating
1000 - codeforces 2154C1未收录· C1. No Cost Too Great (Easy Version) · rating
1400 - codeforces 2154C2未收录· C2. No Cost Too Great (Hard Version) · rating
2000 - codeforces 2154D未收录· D. Catshock · rating
1900 - codeforces 2154E未收录· E. No Mind To Think · rating
2500 - codeforces 2154F1未收录· F1. Bombing (Easy Version) · rating
2700 - codeforces 2154F2未收录· F2. Bombing (Hard Version) · rating
3300
2025-10-24|Codeforces Round 1061 (Div. 2)
- codeforces 2156A未收录· A. Pizza Time · rating
800 - codeforces 2156B未收录· B. Strange Machine · rating
1000 - codeforces 2156C未收录· C. Maximum GCD on Whiteboard · rating
1400 - codeforces 2156D未收录· D. Find the Last Number · rating
1900 - codeforces 2156E未收录· E. Best Time to Buy and Sell Stock · rating
2500 - codeforces 2156F1未收录· F1. Strange Operation (Easy Version) · rating
2200 - codeforces 2156F2未收录· F2. Strange Operation (Hard Version) · rating
3000
2025-10-28|Codeforces Round 1062 (Div. 4)
- codeforces 2167A未收录· A. Square? · rating
800 - codeforces 2167B未收录· B. Your Name · rating
800 - codeforces 2167C未收录· C. Isamatdin and His Magic Wand! · rating
800 - codeforces 2167D未收录· D. Yet Another Array Problem · rating
1000 - codeforces 2167E未收录· E. khba Loves to Sleep! · rating
1600 - codeforces 2167F未收录· F. Tree, TREE!!! · rating
1600 - codeforces 2167G未收录· G. Mukhammadali and the Smooth Array · rating
1600
2025-10-31|Pinely Round 5 (Div. 1 + Div. 2)
- codeforces 2161A未收录· A. Round Trip · rating
800 - codeforces 2161B未收录· B. Make Connected · rating
1700 - codeforces 2161C未收录· C. Loyalty · rating
1200 - codeforces 2161D未收录· D. Locked Out · rating
2100 - codeforces 2161E未收录· E. Left is Always Right · rating
2400 - codeforces 2161F未收录· F. SubMST · rating
3000 - codeforces 2161G未收录· G. Bitwise And Equals · rating
3500 - codeforces 2161H未收录· H. Cycle Sort · rating
3500
2025-11-06|Codeforces Global Round 30 (Div. 1 + Div. 2)
- codeforces 2164A未收录· A. Sequence Game · rating
800 - codeforces 2164B未收录· B. Even Modulo Pair · rating
1000 - codeforces 2164C未收录· C. Dungeon · rating
1400 - codeforces 2164D未收录· D. Copy String · rating
1800 - codeforces 2164E未收录· E. Journey · rating
2300 - codeforces 2164F1未收录· F1. Chain Prefix Rank (Easy Version) · rating
2600 - codeforces 2164F2未收录· F2. Chain Prefix Rank (Hard Version) · rating
2900 - codeforces 2164G未收录· G. Pointless Machine · rating
3300 - codeforces 2164H未收录· H. PalindromePalindrome · rating
3400
2025-11-10|Codeforces Round 1063 (Div. 2)
- codeforces 2163A未收录· A. Souvlaki VS. Kalamaki · rating
800 - codeforces 2163B未收录· B. Siga ta Kymata · rating
1700 - codeforces 2163C未收录· C. Monopati · rating
1500 - codeforces 2163D1未收录· D1. Diadrash (Easy Version) · rating
2100 - codeforces 2163D2未收录· D2. Diadrash (Hard Version) · rating
2500 - codeforces 2163E未收录· E. Plegma · rating
2700
2025-11-14|Educational Codeforces Round 184 (Rated for Div. 2)
- codeforces 2169A未收录· A. Alice and Bob · rating
900 - codeforces 2169B未收录· B. Drifting Away · rating
1100 - codeforces 2169C未收录· C. Range Operation · rating
1300 - codeforces 2169D1未收录· D1. Removal of a Sequence (Easy Version) · rating
1500 - codeforces 2169D2未收录· D2. Removal of a Sequence (Hard Version) · rating
2100 - codeforces 2169E未收录· E. Points Selection · rating
2400 - codeforces 2169F未收录· F. Subsequence Problem · rating
2700
2025-11-16|Codeforces Round 1064 (Div. 1)
- codeforces 2165A未收录· A. Cyclic Merging · rating
1300 - codeforces 2165B未收录· B. Marble Council · rating
1900 - codeforces 2165C未收录· C. Binary Wine · rating
2000 - codeforces 2165D未收录· D. Path Split · rating
2500 - codeforces 2165E未收录· E. Rainbow Branch · rating
3200 - codeforces 2165F未收录· F. Arctic Acquisition · rating
3500
2025-11-16|Codeforces Round 1064 (Div. 2)
- codeforces 2166A未收录· A. Same Difference · rating
800 - codeforces 2166B未收录· B. Tab Closing · rating
900
2025-11-20|Codeforces Round 1065 (Div. 3)
- codeforces 2171A未收录· A. Shizuku Hoshikawa and Farm Legs · rating
800 - codeforces 2171B未收录· B. Yuu Koito and Minimum Absolute Sum · rating
900 - codeforces 2171C1未收录· C1. Renako Amaori and XOR Game (easy version) · rating
1100 - codeforces 2171C2未收录· C2. Renako Amaori and XOR Game (hard version) · rating
1400 - codeforces 2171D未收录· D. Rae Taylor and Trees (easy version) · rating
1400 - codeforces 2171E未收录· E. Anisphia Wynn Palettia and Good Permutations · rating
2000 - codeforces 2171F未收录· F. Rae Taylor and Trees (hard version) · rating
1600 - codeforces 2171G未收录· G. Sakura Adachi and Optimal Sequences · rating
2000 - codeforces 2171H未收录· H. Shiori Miyagi and Maximum Array Score · rating
2400
2025-11-23|Codeforces Round 1066 (Div. 1 + Div. 2)
- codeforces 2157A未收录· A. Dungeon Equilibrium · rating
800 - codeforces 2157B未收录· B. Expansion Plan 2 · rating
900 - codeforces 2157C未收录· C. Meximum Array 2 · rating
1400 - codeforces 2157D未收录· D. Billion Players Game · rating
1600 - codeforces 2157E未收录· E. Adjusting Drones · rating
1900 - codeforces 2157F未收录· F. Git Gud · rating
2400 - codeforces 2157G未收录· G. Isaac’s Queries · rating
2800 - codeforces 2157H未收录· H. Keygen 3 · rating
3200 - codeforces 2157I未收录· I. Hyper Smawk Bros · rating
3500
2025-11-28|Educational Codeforces Round 185 (Rated for Div. 2)
- codeforces 2170A未收录· A. Maximum Neighborhood · rating
800 - codeforces 2170B未收录· B. Addition on a Segment · rating
1200 - codeforces 2170C未收录· C. Quotient and Remainder · rating
1300 - codeforces 2170D未收录· D. Almost Roman · rating
2200 - codeforces 2170E未收录· E. Binary Strings and Blocks · rating
2100 - codeforces 2170F未收录· F. Build XOR on a Segment · rating
2600
2025-11-29|Codeforces Round 1067 (Div. 2)
- codeforces 2158A未收录· A. Suspension · rating
800 - codeforces 2158B未收录· B. Split · rating
1200 - codeforces 2158C未收录· C. Annoying Game · rating
1400 - codeforces 2158D未收录· D. Palindrome Flipping · rating
2000 - codeforces 2158E未收录· E. Sink · rating
2600 - codeforces 2158F1未收录· F1. Distinct GCDs (Easy Version) · rating
2600 - codeforces 2158F2未收录· F2. Distinct GCDs (Hard Version) · rating
3000
2025-12-05|Codeforces Round 1068 (Div. 2)
- codeforces 2173A未收录· A. Sleeping Through Classes · rating
800 - codeforces 2173B未收录· B. Niko’s Tactical Cards · rating
1100 - codeforces 2173C未收录· C. Kanade’s Perfect Multiples · rating
1400 - codeforces 2173D未收录· D. Taiga’s Carry Chains · rating
1900 - codeforces 2173E未收录· E. Shiro’s Mirror Duel · rating
2200 - codeforces 2173F未收录· F. Isla’s Memory Thresholds · rating
2600
2025-12-06|Codeforces Round 1069 (Div. 1)
- codeforces 2174A未收录· A. Needle in a Haystack · rating
1200 - codeforces 2174B未收录· B. Wishing Cards · rating
1900 - codeforces 2174C1未收录· C1. Beautiful Patterns (Easy Version) · rating
2400 - codeforces 2174C2未收录· C2. Beautiful Patterns (Hard Version) · rating
2500 - codeforces 2174D未收录· D. Secret Message · rating
3400 - codeforces 2174E1未收录· E1. Game of Scientists (Version 1) · rating
3100 - codeforces 2174E2未收录· E2. Game of Scientists (Version 2) · rating
3200 - codeforces 2174F未收录· F. Mosaic Tree · rating
2800
2025-12-06|Codeforces Round 1069 (Div. 2)
- codeforces 2175A未收录· A. Little Fairy’s Painting · rating
800 - codeforces 2175B未收录· B. XOR Array · rating
1300
2025-12-11|Codeforces Round 1070 (Div. 2)
- codeforces 2176A未收录· A. Operations with Inversions · rating
800 - codeforces 2176B未收录· B. Optimal Shifts · rating
1000 - codeforces 2176C未收录· C. Odd Process · rating
1300 - codeforces 2176D未收录· D. Fibonacci Paths · rating
1800 - codeforces 2176E未收录· E. Remove at the lowest cost · rating
2400 - codeforces 2176F未收录· F. Omega Numbers · rating
2400
2025-12-19|Codeforces Global Round 31 (Div. 1 + Div. 2)
- codeforces 2180A未收录· A. Carnival Wheel · rating
800 - codeforces 2180B未收录· B. Ashmal · rating
800 - codeforces 2180C未收录· C. XOR-factorization · rating
1900 - codeforces 2180D未收录· D. Insolvable Disks · rating
1900 - codeforces 2180E未收录· E. No Effect XOR · rating
2300 - codeforces 2180F1未收录· F1. Control Car (Easy Version) · rating
2800 - codeforces 2180F2未收录· F2. Control Car (Hard Version) · rating
3200 - codeforces 2180G未收录· G. Balance · rating
3500 - codeforces 2180H1未收录· H1. Bug Is Feature (Unconditional Version) · rating
3400 - codeforces 2180H2未收录· H2. Bug Is Feature (Conditional Version) · rating
3500
2025-12-23|Codeforces Round 1071 (Div. 3)
- codeforces 2179A未收录· A. Blackslex and Password · rating
800 - codeforces 2179B未收录· B. Blackslex and Showering · rating
800 - codeforces 2179C未收录· C. Blackslex and Number Theory · rating
1100 - codeforces 2179D未收录· D. Blackslex and Penguin Civilization · rating
1300 - codeforces 2179E未收录· E. Blackslex and Girls · rating
1800 - codeforces 2179F未收录· F. Blackslex and Another RGB Walking · rating
2000 - codeforces 2179G未收录· G. Blackslex and Penguin Migration · rating
2200 - codeforces 2179H未收录· H. Blackslex and Plants · rating
2200
2025-12-27|Good Bye 2025
- codeforces 2178A未收录· A. Yes or Yes · rating
800 - codeforces 2178B未收录· B. Impost or Sus · rating
900 - codeforces 2178C未收录· C. First or Second · rating
1200 - codeforces 2178D未收录· D. Xmas or Hysteria · rating
1700 - codeforces 2178E未收录· E. Flatten or Concatenate · rating
2000 - codeforces 2178F未收录· F. Conquer or of Forest · rating
2200 - codeforces 2178G未收录· G. deCH OR Dations · rating
2800 - codeforces 2178H未收录· H. Create or Duplicate · rating
3300 - codeforces 2178I未收录· I. Numbers or Fireworks · rating
3300
2025-12-29|Educational Codeforces Round 186 (Rated for Div. 2)
- codeforces 2182A未收录· A. New Year String · rating
800 - codeforces 2182B未收录· B. New Year Cake · rating
800 - codeforces 2182C未收录· C. Production of Snowmen · rating
1200 - codeforces 2182D未收录· D. Christmas Tree Decoration · rating
1600 - codeforces 2182E未收录· E. New Year’s Gifts · rating
1800 - codeforces 2182F1未收录· F1. Christmas Reindeer (easy version) · rating
2300 - codeforces 2182F2未收录· F2. Christmas Reindeer (hard version) · rating
2500 - codeforces 2182G未收录· G. Short Garland · rating
2800