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4648 Palindromic characteristics brute force dp hashing strings Statement D Codeforces Round 427 (Div. 2) {835} PROGRAMMING Editorial 1900
13499 Spy-string bitmasks brute force constructive algorithms dp hashing strings Statement F Codeforces Round 644 (Div. 3) {1360} PROGRAMMING Codeforces Round #644 (Div. 3) Editorial 1700
35370 Double-ended Strings brute force dp hashing strings Statement C Codeforces Round 710 (Div. 3) {1506} PROGRAMMING Editorial
16236 Erase and Extend (Easy Version) binary search brute force dp greedy hashing string suffix structures strings Statement E1 Codeforces Round 726 (Div. 2) {1537} PROGRAMMING 1250.0 Codeforces Round #726 (Div.2) Editorial
15457 Reverse String brute force dp hashing strings Statement B Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2) {1553} PROGRAMMING 500.0 Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) Editorial
4585 Masha-forgetful brute force constructive algorithms dp hashing implementation strings Statement E Codeforces Round 764 (Div. 3) {1624} PROGRAMMING Codeforces Round #764 (Div. 3) Editorial
1645 Palindrome Partition binary search brute force data structures dp hashing strings Statement C Codeforces Round 873 (Div. 1) {1827} PROGRAMMING 1500.0 Codeforces Round #873 (Div. 1 & 2) Editorial 2600
12991 Torn Lucky Ticket brute force dp hashing implementation math Statement C Educational Codeforces Round 157 (Rated for Div. 2) {1895} PROGRAMMING Educational Codeforces Round 157 Editorial
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
23267 Substring and Subsequence bitmasks brute force dp graphs greedy hashing strings trees Statement B Educational Codeforces Round 167 (Rated for Div. 2) {1989} PROGRAMMING Educational Codeforces Round 167 Editorial