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4152 Points on Plane constructive algorithms divide and conquer geometry greedy sortings Statement C Codeforces Round 319 (Div. 1) {576} PROGRAMMING Editorial Codeforces Round #319 2300
38252 Mahmoud and a Triangle constructive algorithms geometry greedy math number theory sortings Statement B Codeforces Round 396 (Div. 2) {766} PROGRAMMING Codeforces round #396 editorial 1100
2581 Nezzar and Nice Beatmap constructive algorithms geometry greedy sortings Statement C Codeforces Round 698 (Div. 1) {1477} PROGRAMMING 1500.0 87294 2200