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  • AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
  • AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
  • AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
  • AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
  • USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
  • Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
  • AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
  • DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
  • USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
12255 AtCoder DDCC2016-QUAL: A. SDカード
12254 AtCoder DDCC2016-FINAL: E. 根付き木とクエリ
12253 AtCoder DDCC2016-FINAL: D. シャツの部屋
12252 AtCoder DDCC2016-FINAL: C. 01文字列
12251 AtCoder DDCC2016-FINAL: B. デュアルカット
12250 AtCoder DDCC2016-FINAL: A. 正方形のチップ
12249 AtCoder DDCC2020-QUAL: F. DISCOSMOS
12248 AtCoder DDCC2020-QUAL: E. Majority of Balls
12247 AtCoder DDCC2020-QUAL: D. Digit Sum Replace
12246 AtCoder DDCC2020-QUAL: C. Strawberry Cakes
12245 AtCoder DDCC2020-QUAL: B. Iron Bar Cutting
12244 AtCoder DDCC2020-QUAL: A. DDCC Finals
12243 AtCoder DDCC2020-FINAL: D. Pars/ey
12242 AtCoder DDCC2020-FINAL: C. Smaller-Suffix-Free Sequences
12241 AtCoder DDCC2020-FINAL: B. Hawker on Graph
12240 AtCoder DDCC2020-FINAL: A. Div/de
12239 AtCoder DDCC2019-MACHINE: B. 装置実装問題(決勝進出者のみ)
12238 AtCoder DDCC2019-MACHINE: A. シミュレータ問題(予選問題)
12237 AtCoder DDCC2019-FINAL: E. 飾りつけ (Decoration)
12236 AtCoder DDCC2019-FINAL: D. DISCO!
12235 AtCoder DDCC2019-FINAL: C. 光の反射 (Reflection of Light)
12234 AtCoder DDCC2019-FINAL: B. 大吉数列 (Array of Fortune)
12233 AtCoder DDCC2019-FINAL: A. レース (Race)
12232 AtCoder DDCC2019-QUAL: D. チップ・ストーリー ~黄金編~
12231 AtCoder DDCC2019-QUAL: C. チップ・ストーリー ~白銀編~
12230 AtCoder DDCC2019-QUAL: B. チップ・ストーリー ~漆黒編~
12229 AtCoder DDCC2019-QUAL: A. チップ・ストーリー ~無色編~
12228 AtCoder DDCC2017-QUAL: D. 石
12227 AtCoder DDCC2017-QUAL: C. 収納
12226 AtCoder DDCC2017-QUAL: B. 鉛筆
12225 AtCoder DDCC2017-QUAL: A. DDCC型文字列
12224 AtCoder DDCC2017-FINAL: E. 足のばし
12223 AtCoder DDCC2017-FINAL: D. なめらかな木
12222 AtCoder DDCC2017-FINAL: C. グラフいじり
12221 AtCoder DDCC2017-FINAL: B. GCDロボット
12220 AtCoder DDCC2017-FINAL: A. 正方形のチップ2
12219 AtCoder CPSCO2019-S4: F. Lost Tree
12218 AtCoder CPSCO2019-S4: E. ox Concatenation
12217 AtCoder CPSCO2019-S4: D. Boring Sequence
12216 AtCoder CPSCO2019-S4: C. Make a Team
12215 AtCoder CPSCO2019-S4: B. Meeting
12214 AtCoder CPSCO2019-S4: A. Swimming
12213 AtCoder CPSCO2019-S3: G. Grand Election
12212 AtCoder CPSCO2019-S3: F. Flexible Permutation
12211 AtCoder CPSCO2019-S3: E. Enumerate Xor Sum
12210 AtCoder CPSCO2019-S3: D. Decode RGB Sequence
12209 AtCoder CPSCO2019-S3: C. Camp Reception
12208 AtCoder CPSCO2019-S3: B. Balloons
12207 AtCoder CPSCO2019-S3: A. ASOKO
12206 AtCoder CPSCO2019-S2: G. MSTX
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