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)
13451	AtCoder KUPC2019: D. Maximin Game
13450	AtCoder KUPC2019: C. てんびんばかり
13449	AtCoder KUPC2019: B. ナップサック問題
13448	AtCoder KUPC2019: A. November Festival
13447	AtCoder KUPC2018: M. 整数と根付き木
13446	AtCoder KUPC2018: L. 凸包が映し出される平面
13445	AtCoder KUPC2018: K. 光と闇の調和
13444	AtCoder KUPC2018: J. ニム?
13443	AtCoder KUPC2018: I. League of Kyoto
13442	AtCoder KUPC2018: H. カラフル数列
13441	AtCoder KUPC2018: G. 数列を構成する問題
13440	AtCoder KUPC2018: F. カード集め
13439	AtCoder KUPC2018: E. 転倒数
13438	AtCoder KUPC2018: D. ロストテクノロジー
13437	AtCoder KUPC2018: C. 七目
13436	AtCoder KUPC2018: B. 弾幕ゲーム
13435	AtCoder KUPC2018: A. 立て看板
13434	AtCoder KUPC2017: L. Coin Game 2017
13433	AtCoder KUPC2017: K. Xor Summation Pattern
13432	AtCoder KUPC2017: J. Paint Red and Make Graph
13431	AtCoder KUPC2017: I. Activate It!!
13430	AtCoder KUPC2017: H. Make a Potion
13429	AtCoder KUPC2017: G. encode/decode 2017
13428	AtCoder KUPC2017: F. 575
13427	AtCoder KUPC2017: E. Treasure Hunt
13426	AtCoder KUPC2017: D. Sanmoku
13425	AtCoder KUPC2017: C. Best Password
13424	AtCoder KUPC2017: B. Camphor Tree
13423	AtCoder KUPC2017: A. Credits
13422	AtCoder KUPC2016: K. Hundred Eyes Monster
13421	AtCoder KUPC2016: J. Coloring
13420	AtCoder KUPC2016: I. Handing out leaflets
13419	AtCoder KUPC2016: H. WAAAAAAAAAAAAALL
13418	AtCoder KUPC2016: G. Exam
13417	AtCoder KUPC2016: F. Speed Solving
13416	AtCoder KUPC2016: E. Fences
13415	AtCoder KUPC2016: D. Long Blackboard
13414	AtCoder KUPC2016: C. Cookie Breeding Machine
13413	AtCoder KUPC2016: B. Problem Committee
13412	AtCoder KUPC2016: A. A Barricade
13411	AtCoder KUPC2015: L. コインゲーム
13410	AtCoder KUPC2015: K. SOULBLOCK
13409	AtCoder KUPC2015: J. MODクエリ
13408	AtCoder KUPC2015: I. ハウスシャッフル
13407	AtCoder KUPC2015: H. Bit Count
13406	AtCoder KUPC2015: G. ケンドー
13405	AtCoder KUPC2015: F. 逆ポーランド記法
13404	AtCoder KUPC2015: E. マッサージチェア2015
13403	AtCoder KUPC2015: D. 高橋君の旅行
13402	AtCoder KUPC2015: C. 最短経路

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

13451

AtCoder KUPC2019: D. Maximin Game

13450

AtCoder KUPC2019: C. てんびんばかり

13449

AtCoder KUPC2019: B. ナップサック問題

13448

AtCoder KUPC2019: A. November Festival

13447

AtCoder KUPC2018: M. 整数と根付き木

13446