Starlight: List of Problems

Over 20,000 problems available. AMC 8/10/12 and AIME problems from 2010-2023; USAJMO/USAMO problems from 2002-2023 available. USACO problems from 2014 to 2023 (all divisions). Codeforces, AtCoder, DMOJ problems are added daily around 04:00 AM UTC, which may cause disruptions.

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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)
13201	AtCoder JOISC2017: B. 港湾設備 (Port Facility)
13200	AtCoder JOISC2017: A. 開拓 (Cultivation)
13199	AtCoder JOISC2016: L. 最悪の記者2
13198	AtCoder JOISC2016: K. 雪降る道路
13197	AtCoder JOISC2016: J. 危険なスケート
13196	AtCoder JOISC2016: I. 電報
13195	AtCoder JOISC2016: H. 回転寿司
13194	AtCoder JOISC2016: G. ダンジョン2
13193	AtCoder JOISC2016: F. トイレ
13192	AtCoder JOISC2016: E. サンドイッチ
13191	AtCoder JOISC2016: D. 雇用計画
13190	AtCoder JOISC2016: C. ソリティア
13189	AtCoder JOISC2016: B. 神経衰弱
13188	AtCoder JOISC2016: A. マトリョーシカ人形
13187	AtCoder JOISC2015: M. 防壁
13186	AtCoder JOISC2015: L. 記憶縛り
13185	AtCoder JOISC2015: K. 遺産相続
13184	AtCoder JOISC2015: J. 道案内
13183	AtCoder JOISC2015: I. とてもたのしいカードゲーム
13182	AtCoder JOISC2015: H. AAQQZ
13181	AtCoder JOISC2015: G. 道路整備
13180	AtCoder JOISC2015: F. 合鍵
13179	AtCoder JOISC2015: E. ビルの飾りつけ 3
13178	AtCoder JOISC2015: D. IOIOI カード占い
13177	AtCoder JOISC2015: C. たのしいたのしい家庭菜園
13176	AtCoder JOISC2015: B. 愉快なロゴデザイン
13175	AtCoder JOISC2015: A. コピー&ペースト 2
13174	AtCoder JOISC2014: M. ストラップ
13173	AtCoder JOISC2014: L. 漢字しりとり
13172	AtCoder JOISC2014: K. 二人の星座
13171	AtCoder JOISC2014: J. 電圧
13170	AtCoder JOISC2014: I. かかし
13169	AtCoder JOISC2014: H. JOIOJI
13168	AtCoder JOISC2014: G. スタンプラリー
13167	AtCoder JOISC2014: F. 友だちをつくろう
13166	AtCoder JOISC2014: E. 水筒
13165	AtCoder JOISC2014: D. ラーメンの食べ比べ
13164	AtCoder JOISC2014: C. 歴史の研究
13163	AtCoder JOISC2014: B. たのしい家庭菜園
13162	AtCoder JOISC2014: A. バス通学
13161	AtCoder JOISC2013-DAY2: 3. スパイ (Spy)
13160	AtCoder JOISC2013-DAY4: 3. 宇宙船 (Spaceships)
13159	AtCoder JOISC2013-DAY4: 2. プレゼント (Presents)
13158	AtCoder JOISC2013-DAY3: 3. 山岳救助隊 (Mountain Rescue Team)
13157	AtCoder JOISC2013-DAY4: 1. メッセンジャー (Messenger)
13156	AtCoder JOISC2013-DAY2: 2. マスコットの片付け (Mascots)
13155	AtCoder JOISC2013-DAY3: 2. コアラ (Koala)
13154	AtCoder JOISC2013-DAY1: 4. JOIポスター (JOI Poster)
13153	AtCoder JOISC2013-DAY2: 1. 建設事業 (Construction Project)
13152	AtCoder JOISC2013-DAY1: 3. 通信妨害 (Communication Jamming)

Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)

13201

AtCoder JOISC2017: B. 港湾設備 (Port Facility)

13200

AtCoder JOISC2017: A. 開拓 (Cultivation)

13199

AtCoder JOISC2016: L. 最悪の記者2

13198

AtCoder JOISC2016: K. 雪降る道路

13197

AtCoder JOISC2016: J. 危険なスケート

13196