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1577 Madhouse (Easy version) brute force constructive algorithms interactive math Statement C1 Codeforces Round 612 (Div. 1) {1286} PROGRAMMING Codeforces Round #612 - Editorial 2400
744 Madhouse (Hard version) brute force constructive algorithms hashing interactive math Statement C2 Codeforces Round 612 (Div. 1) {1286} PROGRAMMING Codeforces Round #612 - Editorial 2900
2502 Integer Game brute force constructive algorithms games interactive math Statement F Codeforces Global Round 9 {1375} PROGRAMMING 2000.0 79731
2781 In Search of Truth (Easy Version) brute force constructive algorithms interactive math probabilities Statement G1 Codeforces Round 878 (Div. 3) {1840} PROGRAMMING Codeforces Round #878 (Div.3) Editorial
1565 Interactive Game with Coloring brute force constructive algorithms graphs implementation interactive math trees Statement E Educational Codeforces Round 155 (Rated for Div. 2) {1879} PROGRAMMING 120773 2400
986 From the Unknown (Hard Version) binary search brute force constructive algorithms interactive math Statement D2 Codeforces Round 1046 (Div. 1) {2135} PROGRAMMING 1250.0 Codeforces Round 1046 (Div. 1, Div. 2) Editorial
2757 Monotone Subsequence brute force constructive algorithms dp graphs interactive math Statement E Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} PROGRAMMING 3000.0 Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial
402 Isaac's Queries brute force constructive algorithms dfs and similar divide and conquer greedy interactive math probabilities Statement G Codeforces Round 1066 (Div. 1 + Div. 2) {2157} PROGRAMMING 3000.0 Codeforces Round 1066 (Div. 1 + Div. 2) Editorial