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)
5721 Codeforces 1287A: Angry Students
5720 Codeforces 1286F: Harry The Potter
5719 Codeforces 1286E: Fedya the Potter Strikes Back
5718 Codeforces 1286D: LCC
5717 Codeforces 1286C2: Madhouse (Hard version)
5716 Codeforces 1286C1: Madhouse (Easy version)
5715 Codeforces 1286B: Numbers on Tree
5714 Codeforces 1286A: Garland
5713 Codeforces 1285F: Classical?
5712 Codeforces 1285E: Delete a Segment
5711 Codeforces 1285D: Dr. Evil Underscores
5710 Codeforces 1285C: Fadi and LCM
5709 Codeforces 1285B: Just Eat It!
5708 Codeforces 1285A: Mezo Playing Zoma
5707 Codeforces 1284G: Seollal
5706 Codeforces 1284F: New Year and Social Network
5705 Codeforces 1284E: New Year and Castle Construction
5704 Codeforces 1284D: New Year and Conference
5703 Codeforces 1284C: New Year and Permutation
5702 Codeforces 1284B: New Year and Ascent Sequence
5701 Codeforces 1284A: New Year and Naming
5700 Codeforces 1283F: DIY Garland
5699 Codeforces 1283E: New Year Parties
5698 Codeforces 1283D: Christmas Trees
5697 Codeforces 1283C: Friends and Gifts
5696 Codeforces 1283B: Candies Division
5695 Codeforces 1283A: Minutes Before the New Year
5694 Codeforces 1282E: The Cake Is a Lie
5693 Codeforces 1282D: Enchanted Artifact
5692 Codeforces 1282C: Petya and Exam
5691 Codeforces 1282B2: K for the Price of One (Hard Version)
5690 Codeforces 1282B1: K for the Price of One (Easy Version)
5689 Codeforces 1282A: Temporarily unavailable
5688 Codeforces 1281B: Azamon Web Services
5687 Codeforces 1281A: Suffix Three
5686 Codeforces 1280F: Intergalactic Sliding Puzzle
5685 Codeforces 1280E: Kirchhoff's Current Loss
5684 Codeforces 1280D: Miss Punyverse
5683 Codeforces 1280C: Jeremy Bearimy
5682 Codeforces 1280B: Beingawesomeism
5681 Codeforces 1280A: Cut and Paste
5680 Codeforces 1279F: New Year and Handle Change
5679 Codeforces 1279E: New Year Permutations
5678 Codeforces 1279D: Santa's Bot
5677 Codeforces 1279C: Stack of Presents
5676 Codeforces 1279B: Verse For Santa
5675 Codeforces 1279A: New Year Garland
5674 Codeforces 1278F: Cards
5673 Codeforces 1278E: Tests for problem D
5672 Codeforces 1278D: Segment Tree
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