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[CF] D. Cubes - Codeforces Round 295 (Div. 2) [CF] D. Berserk Monsters - Educational Codeforces Round 161 (Rated for Div. 2) [LeetCode] LCP 21. 追逐游戏

[CF] C. Good String - Educational Codeforces Round 92 (Rated for Div. 2)

[CF] A. LCM Problem - Educational Codeforces Round 92 (Rated for Div. 2)

[CF] C. Customer Service - Codeforces Round 1002 (Div. 2)

[CF] E. Turtle vs. Rabbit Race: Optimal Trainings - Codeforces Round 929 (Div. 3) [CF] C. Match Points - Educational Codeforces Round 64 (Rated for Div. 2) [CF] C. Slay the Dragon - Educational Codeforces Round 114 (Rated for Div. 2) [CF] D. Sand Fortress - Educational Codeforces Round 44 (Rated for Div. 2) [CF] B. Getting Points - Educational Codeforces Round 159 (Rated for Div. 2) [CF] D. Scarecrow - Codeforces Round 996 (Div. 2) [LC] 3420. Count Non-Decreasing Subarrays After K Operations - Weekly Contest 432 [CF] D. Salary Changing - Educational Codeforces Round 75 (Rated for Div. 2) D. Med-imize - Codeforces Round 963 (Div. 2) D. Maximize the Root - Educational Codeforces Round 168 F. Bomb - Codeforces Round 962 (Div. 3) B. Searching Rectangles - Codeforces Round 371 (Div. 1)

[CF] A. Object Identification - Codeforces Round 1004 (Div. 1) B. Searching Rectangles - Codeforces Round 371 (Div. 1)

[CF] F. Topforces Strikes Back - Codeforces Round 570 (Div. 3)

[CF] E. Vasya and Binary String - Educational Codeforces Round 59 (Rated for Div. 2) [CF] F. Replace on Segment - Educational Codeforces Round 161 (Rated for Div. 2)

[CF] E. Special Segments of Permutation - Educational Codeforces Round 64 (Rated for Div. 2) [CF] E. Triangle Tree - Codeforces Round 1000 (Div. 2)

[CF] C. Good String - Educational Codeforces Round 92 (Rated for Div. 2)

[CF] D. AB-string - Educational Codeforces Round 74 (Rated for Div. 2) [CF] B. Binary Palindromes - Educational Codeforces Round 75 (Rated for Div. 2)

[CF] A. Object Identification - Codeforces Round 1004 (Div. 1) [CF] D. Edge Deletion - Educational Codeforces Round 54 (Rated for Div. 2) [CF] E. Graph Composition - Codeforces Round 998 (Div. 3) [算法][图论] Vizing 定理 [算法][图论] 约翰逊 Johnson 算法 全源最短路

[CF] C. Good String - Educational Codeforces Round 92 (Rated for Div. 2) [CF] F. Isomorphic Strings - Educational Codeforces Round 44 (Rated for Div. 2)

[CF] D. Cubes - Codeforces Round 295 (Div. 2)

[CF] D. 0-1-Tree - Educational Codeforces Round 64 (Rated for Div. 2)

[CF] A. Object Identification - Codeforces Round 1004 (Div. 1) [CF] D. AB-string - Educational Codeforces Round 74 (Rated for Div. 2) [CF] A. Inscribed Figures - Educational Codeforces Round 64 (Rated for Div. 2) [CF] D. Robot Queries - Educational Codeforces Round 159 (Rated for Div. 2) [CF] B. Kevin and Geometry - IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) [CF] B. Farmer John's Card Game - Codeforces Round 998 (Div. 3) [CF] A. Tricky Template - Educational Codeforces Round 161 (Rated for Div. 2) [CF] B. Find the Permutation - Codeforces Round 997 (Div. 2) [CF] C. K-Dominant Character - Educational Codeforces Round 32 [CF] D. Array Division - Educational Codeforces Round 21 [CF] D. Mysterious Crime - Codeforces Round 519 by Botan Investments [CF] B. Crafting - Codeforces Round 996 (Div. 2) [CF] B. Two Cakes - Educational Codeforces Round 35 (Rated for Div. 2)

[CF] A. Object Identification - Codeforces Round 1004 (Div. 1) [CF] C. Customer Service - Codeforces Round 1002 (Div. 2) [CF] B. Cost of the Array - Codeforces Round 1002 (Div. 2) [CF] B. Ugly Pairs - Educational Codeforces Round 64 (Rated for Div. 2) [CF] E. Swapping Characters - Educational Codeforces Round 34 (Rated for Div. 2) [CF] D. Min Cost String - Educational Codeforces Round 107 (Rated for Div. 2) [CF] C. Minimum Ties - Educational Codeforces Round 104 (Rated for Div. 2) [CF] D. Subtract Min Sort - Codeforces Round 998 (Div. 3) [CF] C. Insert and Equalize - Educational Codeforces Round 159 (Rated for Div. 2) [CF] E. Increasing Subsequences - Educational Codeforces Round 161 (Rated for Div. 2) [CF] C. Palindromic Subsequences - Codeforces Round 997 (Div. 2) [CF] B. Find the Permutation - Codeforces Round 997 (Div. 2) [CF] C. The Trail - Codeforces Round 996 (Div. 2) [CF] D. Print a 1337-string... - Educational Codeforces Round 70 (Rated for Div. 2) A. Simple Palindrome - Codeforces Round 972 (Div. 2)

[CF] D. 0-1-Tree - Educational Codeforces Round 64 (Rated for Div. 2)

[CF] H. Bro Thinks He's Him - Codeforces Round 1003 (Div. 4) [CF] D. Almost Difference - Educational Codeforces Round 34 (Rated for Div. 2) E. Decode - Codeforces Round 962 (Div. 3)

[CF] E. Vasya and Binary String - Educational Codeforces Round 59 (Rated for Div. 2)