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972 Tricky and Clever Password binary search constructive algorithms data structures greedy hashing strings Statement E Codeforces Beta Round 30 (Codeforces format) {30} PROGRAMMING Codeforces Beta Round #30. Tutorial for problem A 2700
2150 Beaver data structures dp greedy hashing strings two pointers Statement C Codeforces Beta Round 71 {79} PROGRAMMING Codeforces Beta Round #71 Editorial 1800
651 The Next Good String data structures greedy hashing strings Statement D Codeforces Round 124 (Div. 1) {196} PROGRAMMING Codeforces Round #124 — editorial 2600
791 Have You Ever Heard About the Word? greedy hashing string suffix structures strings Statement D Codeforces Round 189 (Div. 1) {319} PROGRAMMING Codeforces Round #189 — Editorial 2700
646 And Yet Another Bracket Sequence data structures greedy hashing string suffix structures strings Statement F VK Cup 2015 - Round 1 {524} PROGRAMMING VK Cup Round 1 (+ online mirror) editorial 2700
16611 Vitaliy and Pie greedy hashing strings Statement A Codeforces Round 297 (Div. 2) {525} PROGRAMMING Codeforces Round #297 (Div.2) Editorial 1200
2455 Correcting Mistakes constructive algorithms dp greedy hashing strings two pointers Statement E VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) {533} PROGRAMMING Разбор VK Cup Round 2 1800
4885 Tavas and Malekas greedy hashing string suffix structures strings Statement D Codeforces Round 299 (Div. 2) {535} PROGRAMMING Codeforces Round #299 Editorial 2100
7154 Camp Schedule greedy hashing strings Statement B Codeforces Round 545 (Div. 1) {1137} PROGRAMMING Codeforces Round #545 – Editorial 1700
12181 Prefix-Suffix Palindrome (Hard version) greedy hashing string suffix structures strings Statement D2 Codeforces Global Round 7 {1326} PROGRAMMING 1000.0 74961 1800
17457 String Equality dp greedy hashing implementation strings Statement C Codeforces Round 685 (Div. 2) {1451} PROGRAMMING 1250.0 Editorial — Codeforces Round #685
16977 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
6376 Erase and Extend (Hard Version) binary search data structures greedy hashing string suffix structures strings Statement E2 Codeforces Round 726 (Div. 2) {1537} PROGRAMMING 1750.0 Codeforces Round #726 (Div.2) Editorial
30306 Remove Two Letters data structures greedy hashing strings Statement D Codeforces Round 855 (Div. 3) {1800} PROGRAMMING Codeforces Round 855 (Div. 3) Editorial
4611 No Palindromes brute force constructive algorithms greedy hashing implementation strings Statement E Codeforces Global Round 25 {1951} PROGRAMMING 2250.0 Codeforces Global Round 25 Editorial
7977 Fixing a Binary String bitmasks brute force constructive algorithms greedy hashing strings Statement D Codeforces Round 951 (Div. 2) {1979} PROGRAMMING 2000.0 Codeforces Round 951 (Div. 2) Editorial
23653 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
1403 C+K+S brute force constructive algorithms dfs and similar graphs greedy hashing math strings Statement C Codeforces Round 980 (Div. 1) {2023} PROGRAMMING 1500.0 135341
2058 Permutations Harmony brute force combinatorics constructive algorithms greedy hashing implementation math Statement E Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2) {2034} PROGRAMMING 2000.0 Rayan 2024 Selection Round Editorial
229 Naive String Splits brute force greedy hashing strings Statement G Good Bye 2024: 2025 is NEAR {2053} PROGRAMMING 4250.0 Good Bye 2024: 2025 is NEAR Editorial
7239 Palindrome Shuffle binary search greedy hashing strings two pointers Statement D Educational Codeforces Round 174 (Rated for Div. 2) {2069} PROGRAMMING 139774
772 String Cutting binary search brute force greedy hashing string suffix structures strings Statement F Educational Codeforces Round 189 (Rated for Div. 2) {2225} PROGRAMMING Tutorial