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)
14401	AtCoder TESSOKU-BOOK: B09. Papers
14400	AtCoder TESSOKU-BOOK: B08. Counting Points
14399	AtCoder TESSOKU-BOOK: B06. Lottery
14398	AtCoder TESSOKU-BOOK: B04. Binary Representation 2
14397	AtCoder TESSOKU-BOOK: B03. Supermarket 1
14396	AtCoder TESSOKU-BOOK: B02. Divisor Check
14395	AtCoder TESSOKU-BOOK: A03. Two Cards
14394	AtCoder TESSOKU-BOOK: B01. A+B Problem
14393	AtCoder TESSOKU-BOOK: A76. River Crossing
14392	AtCoder TESSOKU-BOOK: A75. Examination
14391	AtCoder TESSOKU-BOOK: A74. Board Game
14390	AtCoder TESSOKU-BOOK: A73. Marathon Route
14389	AtCoder TESSOKU-BOOK: A72. Tile Painting
14388	AtCoder TESSOKU-BOOK: A71. Homework
14387	AtCoder TESSOKU-BOOK: A70. Lanterns
14386	AtCoder TESSOKU-BOOK: A69. Bipartite Matching
14385	AtCoder TESSOKU-BOOK: A68. Maximum Flow
14384	AtCoder TESSOKU-BOOK: A67. MST (Minimum Spanning Tree)
14383	AtCoder TESSOKU-BOOK: A66. Connect Query
14382	AtCoder TESSOKU-BOOK: A65. Road to Promotion
14381	AtCoder TESSOKU-BOOK: A64. Shortest Path 2
14380	AtCoder TESSOKU-BOOK: A61. Adjacent Vertices
14379	AtCoder TESSOKU-BOOK: A60. Stock Price
14378	AtCoder TESSOKU-BOOK: A59. RSQ (Range Sum Queries)
14377	AtCoder TESSOKU-BOOK: A58. RMQ (Range Maximum Queries)
14376	AtCoder TESSOKU-BOOK: A57. Doubling
14375	AtCoder TESSOKU-BOOK: A56. String Hash
14374	AtCoder TESSOKU-BOOK: A55. Set
14373	AtCoder TESSOKU-BOOK: A54. Map
14372	AtCoder TESSOKU-BOOK: A53. Priority Queue
14371	AtCoder TESSOKU-BOOK: A02. Linear Search
14370	AtCoder TESSOKU-BOOK: A52. Queue
14369	AtCoder TESSOKU-BOOK: A51. Stack
14368	AtCoder TESSOKU-BOOK: A49. Heuristic 2
14367	AtCoder TESSOKU-BOOK: A46. Heuristic 1
14366	AtCoder TESSOKU-BOOK: A45. Card Elimination
14365	AtCoder TESSOKU-BOOK: A44. Change and Reverse
14364	AtCoder TESSOKU-BOOK: A43. Travel 3
14363	AtCoder TESSOKU-BOOK: A42. Soccer
14362	AtCoder TESSOKU-BOOK: A41. Tile Coloring
14361	AtCoder TESSOKU-BOOK: A40. Triangle
14360	AtCoder TESSOKU-BOOK: A38. Black Company 1
14359	AtCoder TESSOKU-BOOK: A37. Travel 2
14358	AtCoder TESSOKU-BOOK: A36. Travel
14357	AtCoder TESSOKU-BOOK: A35. Game 4
14356	AtCoder TESSOKU-BOOK: A34. Game 3
14355	AtCoder TESSOKU-BOOK: A33. Game 2
14354	AtCoder TESSOKU-BOOK: A32. Game 1
14353	AtCoder TESSOKU-BOOK: A31. Divisors
14352	AtCoder TESSOKU-BOOK: A30. Combination

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

14401

AtCoder TESSOKU-BOOK: B09. Papers

14400

AtCoder TESSOKU-BOOK: B08. Counting Points

14399

AtCoder TESSOKU-BOOK: B06. Lottery

14398

AtCoder TESSOKU-BOOK: B04. Binary Representation 2

14397

AtCoder TESSOKU-BOOK: B03. Supermarket 1

14396