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13720 Soldier and Number Game constructive algorithms dp math number theory Statement D Codeforces Round 304 (Div. 2) {546} PROGRAMMING Codeforces Round #304 (Div.2) editorial 1700
1443 Vulnerable Kerbals constructive algorithms dp graphs math number theory Statement C VK Cup 2017 - Round 2 {772} PROGRAMMING VK Cup Round 2 + Codeforces Round #409 Tutorial 2400
2946 Sum of Digits brute force constructive algorithms dp greedy math number theory Statement E Educational Codeforces Round 90 (Rated for Div. 2) {1373} PROGRAMMING Educational Codeforces Round 90 Editorial
152 Xor-quiz constructive algorithms dp interactive math number theory Statement H Codeforces Global Round 16 {1566} PROGRAMMING 3750.0 Codeforces Global Round 16 Editorial
2088 Modular Sequence constructive algorithms dp greedy implementation math number theory Statement E Codeforces Round 924 (Div. 2) {1928} PROGRAMMING 2250.0 Codeforces Round 924 Editorial
14807 Gellyfish and Flaming Peony brute force constructive algorithms dp greedy math number theory shortest paths Statement A Codeforces Round 1028 (Div. 1) {2115} PROGRAMMING 500.0 Codeforces Round 1028 (Div.1, Div.2) Editorial