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1819 Earth Wind and Fire constructive algorithms greedy math sortings two pointers Statement E Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 2300
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