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1007 Morse Code binary search data structures dp hashing sortings string suffix structures strings Statement C Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 1) {1129} PROGRAMMING 65520 2300
5368 Division + LCP (easy version) binary search data structures dp hashing string suffix structures strings Statement G1 Codeforces Round 943 (Div. 3) {1968} PROGRAMMING 129096 1900
2550 Division + LCP (hard version) binary search brute force data structures dp hashing math string suffix structures strings Statement G2 Codeforces Round 943 (Div. 3) {1968} PROGRAMMING 129096 2200