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1211 Ann and Half-Palindrome data structures dp graphs string suffix structures strings trees Statement E Codeforces Round 311 (Div. 2) {557} PROGRAMMING Codeforces Round #311 (Div.2) Editorial 2700
3349 Spy Syndrome 2 data structures dp hashing implementation sortings string suffix structures strings Statement C Manthan, Codefest 16 {633} PROGRAMMING Manthan, Codefest 16: Editorials 1900
1009 String Journey data structures dp string suffix structures Statement F Codeforces Round 516 (Div. 1, by Moscow Team Olympiad) {1063} PROGRAMMING Editorial 3000
1000 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
632 Keyboard Design bitmasks data structures dp string suffix structures strings Statement F Educational Codeforces Round 136 (Rated for Div. 2) {1739} PROGRAMMING Educational Codeforces Round 136 Editorial
5268 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
2494 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
192 Fuzzy Concatenation (Hard version) binary search data structures dp greedy string suffix structures Statement E2 Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 1000.0 Tutorial