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2673 Card Game Again binary search data structures number theory two pointers Statement E Educational Codeforces Round 24 {818} PROGRAMMING 52991 2000
6913 Array Stabilization (GCD version) binary search constructive algorithms data structures number theory two pointers Statement F Codeforces Round 731 (Div. 3) {1547} PROGRAMMING Codeforces Round #731 (Div. 3) Editorial
11305 Integers Have Friends binary search data structures math number theory two pointers Statement B Codeforces Round 736 (Div. 1) {1548} PROGRAMMING 1000.0 Codeforces Round 736 Editorial
5313 New Year Concert binary search data structures dp greedy math number theory two pointers Statement D Codeforces Round 769 (Div. 2) {1632} PROGRAMMING 2000.0 Editorial of Codeforces Round #769
2761 MEX of LCM binary search brute force data structures implementation math number theory two pointers Statement E Codeforces Round 879 (Div. 2) {1834} PROGRAMMING 2500.0 Codeforces Round #879 Editorial
2066 Eri and Expanded Sets binary search data structures number theory two pointers Statement C Codeforces Round 969 (Div. 1) {2006} PROGRAMMING 1500.0 Tutorial