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)
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
6801 Codeforces 1499B: Binary Removals
6800 Codeforces 1499A: Domino on Windowsill
6799 Codeforces 1498F: Christmas Game
6798 Codeforces 1498E: Two Houses
6797 Codeforces 1498D: Bananas in a Microwave
6796 Codeforces 1498C: Planar Reflections
6795 Codeforces 1498B: Box Fitting
6794 Codeforces 1498A: GCD Sum
6793 Codeforces 1497E2: Square-free division (hard version)
6792 Codeforces 1497E1: Square-Free Division (easy version)
6791 Codeforces 1497D: Genius
6790 Codeforces 1497C2: k-LCM (hard version)
6789 Codeforces 1497C1: k-LCM (easy version)
6788 Codeforces 1497B: M-arrays
6787 Codeforces 1497A: Meximization
6786 Codeforces 1496B: Max and Mex
6785 Codeforces 1496A: Split it!
6784 Codeforces 1495F: Squares
6783 Codeforces 1495E: Qingshan and Daniel
6782 Codeforces 1495D: BFS Trees
6781 Codeforces 1495C: Garden of the Sun
6780 Codeforces 1495B: Let's Go Hiking
6779 Codeforces 1495A: Diamond Miner
6778 Codeforces 1494F: Delete The Edges
6777 Codeforces 1494E: A-Z Graph
6776 Codeforces 1494D: Dogeforces
6775 Codeforces 1494C: 1D Sokoban
6774 Codeforces 1494B: Berland Crossword
6773 Codeforces 1494A: ABC String
6772 Codeforces 1493F: Enchanted Matrix
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