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2263 Kyoya and Permutation binary search combinatorics constructive algorithms greedy implementation math Statement B Codeforces Round 309 (Div. 1) {553} PROGRAMMING Codeforces Round #309 Editorial 2200
10157 Sanatorium binary search constructive algorithms greedy implementation math Statement C Codeforces Round 377 (Div. 2) {732} PROGRAMMING Codeforces Round #377 (Div. 2) Editorial 1300
8308 The Party and Sweets binary search constructive algorithms greedy implementation math sortings two pointers Statement A Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 1500
7006 Different Rules binary search constructive algorithms greedy implementation math Statement B Codeforces Round 622 (Div. 2) {1313} PROGRAMMING 1000.0 Editorial 1700
2332 Red-Blue Operations (Hard Version) binary search constructive algorithms greedy implementation math Statement D2 Educational Codeforces Round 148 (Rated for Div. 2) {1832} PROGRAMMING 116454 2400
2251 Removal of a Sequence (Hard Version) binary search constructive algorithms divide and conquer greedy implementation math number theory probabilities Statement D2 Educational Codeforces Round 184 (Rated for Div. 2) {2169} PROGRAMMING Educational Codeforces Round 184 Editorial