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原创 【算法】树上启发式合并 (CCPC2020长春 F. Strange Memory)
CCPC2020长春 F. Strange Memory树上启发式合并
2025-10-05 20:43:03
1079
原创 D. Traffic Lights 【Codeforces Round 1038, Div. 1 + Div. 2】
D. Traffic Lights 【Codeforces Round 1038, Div. 1 + Div. 2】 暴力枚举(brute force)动态规划(dp)图论(graphs)最短路(shortest paths)
2025-07-20 16:53:38
412
原创 D. Gellyfish and Camellia Japonica【Codeforces Round 1028 (Div. 2)】
D. Gellyfish and Camellia Japonica【Codeforces Round 1028 (Div. 2)】构造(constructive algorithms)DFS及其变种(dfs and similar)图论(graphs)贪心(greedy)树形结构(trees)
2025-06-02 15:05:24
322
原创 E. Melody 【CF1026 (Div. 2)】 (求欧拉路径之Hierholzer算法)
求欧拉路径的Hierholzer算法 Codeforces Round 1026 (Div. 2) E. Melody DFS及其变种(dfs and similar)图论(graphs)模拟(implementation)*2300
2025-05-30 17:52:20
509
原创 D. Fewer Batteries 【Codeforces Round 1026 (Div. 2)】
【Codeforces Round 1026 (Div. 2)】D. Fewer Batteries 的三种思路 二分(binary search)DFS及其变种(dfs and similar)动态规划(dp)图论(graphs)贪心(greedy)
2025-05-25 17:21:17
811
原创 D. Eating【Codeforces Round 1005 (Div. 2)】
Codeforces Round 1005 (Div. 2) D. Eating二分(binary search)状态压缩(bitmasks)暴力枚举(brute force)数据结构(data structures)动态规划(dp)贪心(greedy)树形结构(trees)双指针(two pointers)
2025-05-14 22:28:14
713
原创 E. 23 Kingdom【Codeforces Round 1024 (Div. 2)】
E. 23 Kingdom【Codeforces Round 1024 (Div. 2)】 数据结构(data structures)贪心(greedy)三分(ternary search)双指针(two pointers)
2025-05-14 16:38:25
488
2
原创 D. Apple Tree Traversing 【Codeforces Round 1023 (Div. 2)】
Codeforces Round 1023 (Div. 2) D. Apple Tree Traversing 暴力枚举(brute force)DFS及其变种(dfs and similar)贪心(greedy)模拟(implementation)树形结构(trees)
2025-05-10 16:52:35
1020
原创 E. Unpleasant Strings【Educational Codeforces Round 178 (Rated for Div. 2)】
E. Unpleasant Strings【Educational Codeforces Round 178 (Rated for Div. 2)】动态规划(dp)贪心(greedy)字符串处理(strings)
2025-04-30 17:04:30
654
原创 G - Maximize Distance【ABC397】
G - Maximize Distance OMRON Corporation Programming Contest 2025 (AtCoder Beginner Contest 397)网络流 图论 二分答案 DINIC
2025-03-27 17:45:21
498
原创 E. Serval and Modulo【Codeforces Round 1011 (Div. 2)】
E. Serval and Modulo【Codeforces Round 1011 (Div. 2)】构造(constructive algorithms)数学(math)数论(number theory)
2025-03-25 04:00:00
852
原创 D. Serval and Kaitenzushi Buffet 【Codeforces Round 1011 (Div. 2)】
D. Serval and Kaitenzushi Buffet 【Codeforces Round 1011 (Div. 2)】数据结构(data structures)图匹配(graph matchings)贪心(greedy)
2025-03-24 19:37:42
743
原创 C . Serval and The Formula【Codeforces Round 1011 (Div. 2)】
【Codeforces Round 1011 (Div. 2)】C. Serval and The Formula 状态压缩(bitmasks)构造(constructive algorithms)贪心(greedy)
2025-03-24 19:28:39
1100
原创 G. Game With Triangles: Season 2【Codeforces Round 1009 (Div. 3)】
Codeforces Round 1009 (Div. 3) G. Game With Triangles: Season 2动态规划(dp)计算几何(geometry)*2100
2025-03-22 13:53:08
997
原创 D. Equalization【Educational Codeforces Round 176 (Rated for Div. 2)】
Educational Codeforces Round 176 (Rated for Div. 2) D. Equalization状态压缩(bitmasks)暴力枚举(brute force)动态规划(dp)图论(graphs)贪心(greedy)数学(math)
2025-03-20 21:35:52
767
原创 E - Path Decomposition of a Tree【 ABC 397】
E - Path Decomposition of a Tree (AtCoder Beginner Contest 397) 树形dp 图论 dfs
2025-03-16 15:15:58
459
原创 F. Counting Necessary Nodes 【Codeforces Round 1009 (Div. 3)】
Codeforces Round 1009 (Div. 3) F. Counting Necessary Nodes状态压缩(bitmasks)分治(divide and conquer)计算几何(geometry)贪心(greedy)模拟(implementation)数学(math)
2025-03-13 16:54:20
496
原创 E. Finding OR Sum【Codeforces Round 1008 (Div. 2)】
E. Finding OR Sum【Codeforces Round 1008 (Div. 2)】 状态压缩(bitmasks)模拟(implementation)交互题(interactive)数学(math)
2025-03-11 19:35:08
435
原创 D1. Infinite Sequence (Easy Version) 【Codeforces Round 1007 (Div. 2)】
D1. Infinite Sequence (Easy Version) 【Codeforces Round 1007 (Div. 2)】状态压缩(bitmasks)暴力枚举(brute force)动态规划(dp)模拟(implementation)数学(math)
2025-03-09 16:19:21
1113
原创 G. Tree Destruction 【Codeforces Round 991 (Div. 3)】
Codeforces Round 991 (Div. 3) G. Tree DestructionDFS及其变种(dfs and similar)动态规划(dp)树形结构(trees)
2025-03-05 12:35:37
338
1
原创 E - Palindromic Shortest Path【ABC394】
E - Palindromic Shortest Path【ABC394】 BFS 图论 字符串
2025-02-22 22:40:35
394
原创 D. Graph and Graph 【Codeforces Round 1002 (Div. 2)】
Codeforces Round 1002 (Div. 2) D. Graph and Graph 数据结构(data structures)图论(graphs)贪心(greedy)最短路(shortest paths)
2025-02-21 19:48:01
918
原创 C. Beautiful Sequence + D. Palindrome Shuffle【Educational Codeforces Round 174 (Rated for Div. 2)】
Educational Codeforces Round 174 (Rated for Div. 2)
2025-02-19 23:49:26
1001
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