Ojs

[AtCoder] Beginner Contest 176 E - Bomber [AtCoder] Beginner Contest 177 E - Coprime [AtCoder] Beginner Contest 177 [AtCoder] Beginner Contest 177 F - I hate Shortest Path Problem

[CF] E. Mycraft Sand Sort - Codeforces Round 1005 (Div. 2) [CF] C. Vasya And The Mushrooms - Educational Codeforces Round 48 (Rated for Div. 2) [CF] B. Segment Occurrences - Educational Codeforces Round 48 (Rated for Div. 2) [CF] B. Variety is Discouraged - Codeforces Round 1005 (Div. 2) [CF] C. Remove the Ends - Codeforces Round 1005 (Div. 2) [CF] D. Eating - Codeforces Round 1005 (Div. 2) [CF] C. Brutality - Educational Codeforces Round 59 (Rated for Div. 2) [CF] D. Compression - Educational Codeforces Round 59 (Rated for Div. 2) [CF] E. Vasya and Binary String - Educational Codeforces Round 59 (Rated for Div. 2) [CF] A. Object Identification - Codeforces Round 1004 (Div. 1) [CF] B. Minimization - Codeforces Round 317 [AimFund Thanks-Round] (Div. 1) [CF] D. Cubes - Codeforces Round 295 (Div. 2) [CF] H. Bro Thinks He's Him - Codeforces Round 1003 (Div. 4) [CF] F. Topforces Strikes Back - Codeforces Round 570 (Div. 3) [CF] C. Good String - Educational Codeforces Round 92 (Rated for Div. 2) [CF] B. Array Walk - Educational Codeforces Round 92 (Rated for Div. 2) [CF] A. LCM Problem - Educational Codeforces Round 92 (Rated for Div. 2) [CF] D. AB-string - Educational Codeforces Round 74 (Rated for Div. 2) [CF] C. Customer Service - Codeforces Round 1002 (Div. 2) [CF] B. Cost of the Array - 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] D. 0-1-Tree - Educational Codeforces Round 64 (Rated for Div. 2) [CF] E. Special Segments of Permutation - Educational Codeforces Round 64 (Rated for Div. 2) [CF] B. Ugly Pairs - Educational Codeforces Round 64 (Rated for Div. 2) [CF] A. Inscribed Figures - Educational Codeforces Round 64 (Rated for Div. 2) [CF] F. Clear The Matrix - Educational Codeforces Round 34 (Rated for Div. 2) [CF] B. The Modcrab - Educational Codeforces Round 34 (Rated for Div. 2) [CF] B. Alice, Bob, Two Teams - Educational Codeforces Round 9 [CF] B. Cat Cycle - Educational Codeforces Round 104 (Rated for Div. 2) [CF] E. Cheap Dinner - Educational Codeforces Round 104 (Rated for Div. 2) [CF] E. Swapping Characters - Educational Codeforces Round 34 (Rated for Div. 2) [CF] D. Almost Difference - Educational Codeforces Round 34 (Rated for Div. 2) [CF] C. Boxes Packing - Educational Codeforces Round 34 (Rated for Div. 2) [CF] C. Slay the Dragon - Educational Codeforces Round 114 (Rated for Div. 2) [CF] A. Chess Placing - Educational Codeforces Round 44 (Rated for Div. 2) [CF] B. Switches and Lamps - Educational Codeforces Round 44 (Rated for Div. 2) [CF] D. Sand Fortress - Educational Codeforces Round 44 (Rated for Div. 2) [CF] E. Pencils and Boxes - Educational Codeforces Round 44 (Rated for Div. 2) [CF] C. Yet Another Card Deck - Educational Codeforces Round 107 (Rated for Div. 2) [CF] D. Min Cost String - Educational Codeforces Round 107 (Rated for Div. 2) [CF] D. Edge Deletion - Educational Codeforces Round 54 (Rated for Div. 2) [CF] D. Merge Equals - Educational Codeforces Round 42 (Rated for Div. 2) [CF] C. Make a Square - Educational Codeforces Round 42 (Rated for Div. 2) [CF] B. Students in Railway Carriage - Educational Codeforces Round 42 (Rated for Div. 2) [CF] D. Pythagorean Triples - Educational Codeforces Round 104 (Rated for Div. 2) [CF] C. Minimum Ties - Educational Codeforces Round 104 (Rated for Div. 2) [CF] E. Triangle Tree - Codeforces Round 1000 (Div. 2) [CF] F. Isomorphic Strings - Educational Codeforces Round 44 (Rated for Div. 2) [CF] D. Turtle Tenacity: Continual Mods - Codeforces Round 929 (Div. 3) …more

[LC] 3420. Count Non-Decreasing Subarrays After K Operations - Weekly Contest 432 [LeetCode] 值得一做的题目列表 [LeetCode] LCP 21. 追逐游戏 [LeetCode] 1575. Count All Possible Routes

[Luogu] P4588 [TJOI2018]数学计算