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12997 Unforgivable Curse (hard version) brute force constructive algorithms constructive algorithms ds graphs greedy Statement E2 Codeforces Round 855 (Div. 3) {1800} PROGRAMMING Codeforces Round 855 (Div. 3) Editorial
12983 Unforgivable Curse (easy version) brute force constructive algorithms ds graphs greedy Statement E1 Codeforces Round 855 (Div. 3) {1800} PROGRAMMING Codeforces Round 855 (Div. 3) Editorial