Starlight: List of Problems

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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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ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
1071 Codeforces 231C: To Add or Not to Add
1070 Codeforces 231B: Magic, Wizardry and Wonders
1069 Codeforces 231A: Team
1068 Codeforces 230B: T-primes
1067 Codeforces 230A: Dragons
1066 Codeforces 229E: Gifts
1065 Codeforces 229D: Towers
1064 Codeforces 229C: Triangles
1063 Codeforces 229B: Planets
1062 Codeforces 229A: Shifts
1061 Codeforces 228E: The Road to Berland is Paved With Good Intentions
1060 Codeforces 228D: Zigzag
1059 Codeforces 228C: Fractal Detector
1058 Codeforces 228B: Two Tables
1057 Codeforces 228A: Is your horseshoe on the other hoof?
1056 Codeforces 227B: Effective Approach
1055 Codeforces 227A: Where do I Turn?
1054 Codeforces 226E: Noble Knight's Path
1053 Codeforces 226D: The table
1052 Codeforces 226C: Anniversary
1051 Codeforces 226B: Naughty Stone Piles
1050 Codeforces 226A: Flying Saucer Segments
1049 Codeforces 225E: Unsolvable
1048 Codeforces 225D: Snake
1047 Codeforces 225C: Barcode
1046 Codeforces 225B: Well-known Numbers
1045 Codeforces 225A: Dice Tower
1044 Codeforces 224B: Array
1043 Codeforces 224A: Parallelepiped
1042 Codeforces 223E: Planar Graph
1041 Codeforces 223D: Spider
1040 Codeforces 223C: Partial Sums
1039 Codeforces 223B: Two Strings
1038 Codeforces 223A: Bracket Sequence
1037 Codeforces 222E: Decoding Genome
1036 Codeforces 222D: Olympiad
1035 Codeforces 222C: Reducing Fractions
1034 Codeforces 222B: Cosmic Tables
1033 Codeforces 222A: Shooshuns and Sequence
1032 Codeforces 221B: Little Elephant and Numbers
1031 Codeforces 221A: Little Elephant and Function
1030 Codeforces 220E: Little Elephant and Inversions
1029 Codeforces 220D: Little Elephant and Triangle
1028 Codeforces 220C: Little Elephant and Shifts
1027 Codeforces 220B: Little Elephant and Array
1026 Codeforces 220A: Little Elephant and Problem
1025 Codeforces 219E: Parking Lot
1024 Codeforces 219D: Choosing Capital for Treeland
1023 Codeforces 219C: Color Stripe
1022 Codeforces 219B: Special Offer! Super Price 999 Bourles!
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