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4197 Dasha and Very Difficult Problem binary search brute force constructive algorithms greedy sortings Statement D Codeforces Round 394 (Div. 2) {761} PROGRAMMING Codeforces Round #394 (Div. 2) [Editorial] 1700
1785 PermutationForces II binary search brute force combinatorics constructive algorithms greedy sortings Statement E Codeforces Round 803 (Div. 2) {1698} PROGRAMMING 2000.0 Codeforces Round #803 (Div. 2) Editorial