Codeforces problemset search & solutions
Exclude tags.

Review the problem statement from Codeforces (link will open a new tab). When you've matched your problem, go to the solutions.

Search on plain tags, ratings, names, and problem text. Example: brute force or binary search

< 1 2 3

Solved
Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
8685 Red Light, Green Light (Easy version) brute force dfs and similar dp graphs implementation Statement D1 Codeforces Round 1030 (Div. 2) {2118} PROGRAMMING 1250.0 Codeforces Round 1030 (Div. 2) Editorial
4465 1-1-1, Free Tree! data structures dfs and similar graphs trees Statement F Codeforces Round 1037 (Div. 3) {2126} PROGRAMMING 144845
2690 23 Rises Again brute force data structures dfs and similar dp flows graphs implementation probabilities trees Statement H Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} PROGRAMMING 4000.0 Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial
8295 Root was Built by Love, Broken by Destiny combinatorics dfs and similar graphs trees Statement D Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} PROGRAMMING 2000.0 Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial
2978 Rada and the Chamomile Valley dfs and similar graphs shortest paths Statement F Codeforces Round 1043 (Div. 3) {2132} PROGRAMMING Codeforces Round 1043 (Div. 3) Editorial
6421 By the Assignment bitmasks dfs and similar dsu graphs Statement C Codeforces Round 1046 (Div. 1) {2135} PROGRAMMING 1750.0 Codeforces Round 1046 (Div. 1, Div. 2) Editorial
2031 Cry Me a River dfs and similar dp games graphs Statement G Codeforces Round 1047 (Div. 3) {2137} PROGRAMMING Codeforces Round 1047 (Div. 3) Editorial
5753 Maple and Tree Beauty (Easy Version) dfs and similar dp graphs trees Statement C1 Codeforces Round 1048 (Div. 1) {2138} PROGRAMMING 1250.0 Codeforces Round 1048 (Div. 1, Div. 2) Editorial
85 Merging Vertices in a Graph *special dfs and similar dsu graphs Statement H Kotlin Heroes: Episode 13 {2141} PROGRAMMING Kotlin Heroes 13 Editorial
15108 Max Tree dfs and similar graphs greedy Statement C Codeforces Round 1051 (Div. 2) {2143} PROGRAMMING 1500.0 Codeforces Round 1051 (Div. 2) Editorial
1073 Long Journey dfs and similar dp graphs matrices number theory shortest paths Statement F Educational Codeforces Round 183 (Rated for Div. 2) {2145} PROGRAMMING Educational Codeforces Round 183 Editorial
5133 Catshock constructive algorithms dfs and similar graphs trees Statement D Codeforces Round 1060 (Div. 2) {2154} PROGRAMMING 1750.0 Codeforces Round 1060 (Div. 2) Editorial
757 Juan's Colorful Tree data structures data structures dfs and similar dfs and similar dsu graphs graphs trees Statement F Codeforces Round 1056 (Div. 2) {2155} PROGRAMMING 3000.0 Codeforces Round 1056 (Div. 2) Editorial
4768 Journey dfs and similar dsu graphs greedy Statement E Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} PROGRAMMING 2250.0 Codeforces Global Round 30 Editorial
4367 Cherry Tree dfs and similar dp graphs trees Statement F Codeforces Round 1072 (Div. 3) {2184} PROGRAMMING Codeforces Round 1072 (Div. 3) Editorial
1514 Jerry and Tom data structures dfs and similar games graphs greedy trees Statement C Codeforces Round 1077 (Div. 1) {2187} PROGRAMMING 1750.0 Codeforces Round 1077 (Div. 1, Div. 2) Editorial
2322 Swap to Rearrange constructive algorithms dfs and similar graph matchings graphs greedy strings Statement E Codeforces Round 1081 (Div. 2) {2192} PROGRAMMING 2250.0 Codeforces Round 1081 (Div. 2) Editorial
3952 Interactive Graph (Simple Version) combinatorics dfs and similar dp graphs interactive Statement C1 Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 750.0 Tutorial
2791 Interactive Graph (Hard Version) combinatorics dfs and similar dp graphs interactive Statement C2 Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 750.0 Tutorial
10260 Alternating Path dfs and similar graphs Statement D Educational Codeforces Round 188 (Rated for Div. 2) {2204} PROGRAMMING Educational Codeforces Round 188 Editorial
4887 Tree Orientation (Easy Version) constructive algorithms dfs and similar dsu graphs greedy trees Statement D1 Codeforces Round 1086 (Div. 2) {2208} PROGRAMMING 1250.0 Tutorial
2127 Tree Orientation (Hard Version) data structures dfs and similar dsu graphs greedy matrices sortings trees Statement D2 Codeforces Round 1086 (Div. 2) {2208} PROGRAMMING 1250.0 Tutorial
229 Statistics on Tree binary search brute force dfs and similar divide and conquer graphs trees Statement G Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2) {2222} PROGRAMMING 3500.0 Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2) Editorial
1191 Graph Cutting dfs and similar dp trees Statement E Codeforces Round 1099 (Div. 2) {2231} PROGRAMMING 2500.0
1236 Diameter Intersections brute force dfs and similar fft graphs trees Statement E Educational Codeforces Round 193 (Rated for Div. 2) {2253} PROGRAMMING 155813
10435 Spying on the Beaver dfs and similar dsu graphs trees Statement C Codeforces Round 1117 (Div. 2) {2257} PROGRAMMING 1250.0 Codeforces Round 1117 (Div. 2) Editorial
83 Plus Minus Tree dfs and similar dp graphs trees Statement F Codeforces Round 1118 (Div. 2) {2258} PROGRAMMING 3000.0 Codeforces Round 1118 (Div. 2) Editorial