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)
6851 Codeforces 1510D: Digits
6850 Codeforces 1510C: Cactus Not Enough
6849 Codeforces 1510B: Button Lock
6848 Codeforces 1510A: ASCII Automata Art
6847 Codeforces 1509C: The Sports Festival
6846 Codeforces 1509B: TMT Document
6845 Codeforces 1509A: Average Height
6844 Codeforces 1508F: Optimal Encoding
6843 Codeforces 1508E: Tree Calendar
6842 Codeforces 1508D: Swap Pass
6841 Codeforces 1508C: Complete the MST
6840 Codeforces 1508B: Almost Sorted
6839 Codeforces 1508A: Binary Literature
6838 Codeforces 1506G: Maximize the Remaining String
6837 Codeforces 1506F: Triangular Paths
6836 Codeforces 1506E: Restoring the Permutation
6835 Codeforces 1506D: Epic Transformation
6834 Codeforces 1506C: Double-ended Strings
6833 Codeforces 1506B: Partial Replacement
6832 Codeforces 1506A: Strange Table
6831 Codeforces 1505I: Mysterious language again, seriously?
6830 Codeforces 1505H: L BREAK into program
6829 Codeforces 1505G: Encoded message
6828 Codeforces 1505F: Math
6827 Codeforces 1505E: Cakewalk
6826 Codeforces 1505D: Xenolith? Hippodrome?
6825 Codeforces 1505C: Fibonacci Words
6824 Codeforces 1505B: DMCA
6823 Codeforces 1505A: Is it rated - 2
6822 Codeforces 1504B: Flip the Bits
6821 Codeforces 1504A: Déjà Vu
6820 Codeforces 1503F: Balance the Cards
6819 Codeforces 1503E: 2-Coloring
6818 Codeforces 1503D: Flip the Cards
6817 Codeforces 1503C: Travelling Salesman Problem
6816 Codeforces 1503B: 3-Coloring
6815 Codeforces 1503A: Balance the Bits
6814 Codeforces 1501B: Napoleon Cake
6813 Codeforces 1501A: Alexey and Train
6812 Codeforces 1500F: Cupboards Jumps
6811 Codeforces 1500E: Subset Trick
6810 Codeforces 1500D: Tiles for Bathroom
6809 Codeforces 1500C: Matrix Sorting
6808 Codeforces 1500B: Two chandeliers
6807 Codeforces 1500A: Going Home
6806 Codeforces 1499G: Graph Coloring
6805 Codeforces 1499F: Diameter Cuts
6804 Codeforces 1499E: Chaotic Merge
6803 Codeforces 1499D: The Number of Pairs
6802 Codeforces 1499C: Minimum Grid Path
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