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)
12601	AtCoder JAG2015SUMMER-DAY2: G. Escape
12600	AtCoder JAG2015SUMMER-DAY2: F. ほぼ周期文字列
12599	AtCoder JAG2015SUMMER-DAY2: E. 坑道数式
12598	AtCoder JAG2015SUMMER-DAY2: D. 真っ暗な部屋
12597	AtCoder JAG2015SUMMER-DAY2: C. ABC Gene
12596	AtCoder JAG2015SUMMER-DAY2: B. 監獄
12595	AtCoder JAG2015SUMMER-DAY2: A. 幾何問題を解こう
12594	AtCoder JAG2015SPRING: L. Wall Making Game
12593	AtCoder JAG2015SPRING: K. Runner and Sniper
12592	AtCoder JAG2015SPRING: J. New Game AI
12591	AtCoder JAG2015SPRING: I. Midpoint
12590	AtCoder JAG2015SPRING: H. Kimagure Cleaner
12589	AtCoder JAG2015SPRING: G. JAG-channel II
12588	AtCoder JAG2015SPRING: F. ICPC Teams
12587	AtCoder JAG2015SPRING: E. Cost Performance Flow
12586	AtCoder JAG2015SPRING: D. Content Delivery
12585	AtCoder JAG2015SPRING: C. Casino
12584	AtCoder JAG2015SPRING: B. Card Game Strategy
12583	AtCoder JAG2015SPRING: A. Balanced Paths
12582	AtCoder JAG2015AUTUMN: K. Optimal Tournament
12581	AtCoder JAG2015AUTUMN: J. Longest Shortest Path
12580	AtCoder JAG2015AUTUMN: I. Shortest Bridge
12579	AtCoder JAG2015AUTUMN: H. Donut Decoration
12578	AtCoder JAG2015AUTUMN: G. Cube Dividing
12577	AtCoder JAG2015AUTUMN: F. Modern Announce Network
12576	AtCoder JAG2015AUTUMN: E. Shifting a Matrix
12575	AtCoder JAG2015AUTUMN: D. Line Gimmick
12574	AtCoder JAG2015AUTUMN: C. Delete Files
12573	AtCoder JAG2015AUTUMN: B. Change a Password
12572	AtCoder JAG2015AUTUMN: A. M and A
12571	AtCoder JAG2014SUMMER-DAY4: J. Vongress
12570	AtCoder JAG2014SUMMER-DAY4: I. 首都
12569	AtCoder JAG2014SUMMER-DAY4: H. トーナメント
12568	AtCoder JAG2014SUMMER-DAY4: G. リサイクル
12567	AtCoder JAG2014SUMMER-DAY4: F. Longest Match
12566	AtCoder JAG2014SUMMER-DAY4: E. AI
12565	AtCoder JAG2014SUMMER-DAY4: D. 夕食
12564	AtCoder JAG2014SUMMER-DAY4: C. Magic Bullet
12563	AtCoder JAG2014SUMMER-DAY4: B. 不審者
12562	AtCoder JAG2014SUMMER-DAY4: A. 山手線
12561	AtCoder JAG2014SUMMER-DAY2: J. Hyperrectangle
12560	AtCoder JAG2014SUMMER-DAY2: I. Substring Pairs
12559	AtCoder JAG2014SUMMER-DAY2: H. Distance Sum
12558	AtCoder JAG2014SUMMER-DAY2: G. Snake
12557	AtCoder JAG2014SUMMER-DAY2: F. Directions
12556	AtCoder JAG2014SUMMER-DAY2: E. Cellular Automaton
12555	AtCoder JAG2014SUMMER-DAY2: D. Dense Amidakuji
12554	AtCoder JAG2014SUMMER-DAY2: C. Clique Coloring
12553	AtCoder JAG2014SUMMER-DAY2: B. Dictionary
12552	AtCoder JAG2014SUMMER-DAY2: A. Manhattan

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

12601

AtCoder JAG2015SUMMER-DAY2: G. Escape

12600

AtCoder JAG2015SUMMER-DAY2: F. ほぼ周期文字列

12599

AtCoder JAG2015SUMMER-DAY2: E. 坑道数式

12598

AtCoder JAG2015SUMMER-DAY2: D. 真っ暗な部屋

12597

AtCoder JAG2015SUMMER-DAY2: C. ABC Gene

12596