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)
3521 Codeforces 827B: High Load
3520 Codeforces 827A: String Reconstruction
3519 Codeforces 825G: Tree Queries
3518 Codeforces 825F: String Compression
3517 Codeforces 825E: Minimal Labels
3516 Codeforces 825D: Suitable Replacement
3515 Codeforces 825C: Multi-judge Solving
3514 Codeforces 825B: Five-In-a-Row
3513 Codeforces 825A: Binary Protocol
3512 Codeforces 822F: Madness
3511 Codeforces 822E: Liar
3510 Codeforces 822D: My pretty girl Noora
3509 Codeforces 822C: Hacker, pack your bags!
3508 Codeforces 822B: Crossword solving
3507 Codeforces 822A: I'm bored with life
3506 Codeforces 821E: Okabe and El Psy Kongroo
3505 Codeforces 821D: Okabe and City
3504 Codeforces 821C: Okabe and Boxes
3503 Codeforces 821B: Okabe and Banana Trees
3502 Codeforces 821A: Okabe and Future Gadget Laboratory
3501 Codeforces 820B: Mister B and Angle in Polygon
3500 Codeforces 820A: Mister B and Book Reading
3499 Codeforces 819E: Mister B and Flight to the Moon
3498 Codeforces 819D: Mister B and Astronomers
3497 Codeforces 819C: Mister B and Beacons on Field
3496 Codeforces 819B: Mister B and PR Shifts
3495 Codeforces 819A: Mister B and Boring Game
3494 Codeforces 818G: Four Melodies
3493 Codeforces 818F: Level Generation
3492 Codeforces 818E: Card Game Again
3491 Codeforces 818D: Multicolored Cars
3490 Codeforces 818C: Sofa Thief
3489 Codeforces 818B: Permutation Game
3488 Codeforces 818A: Diplomas and Certificates
3487 Codeforces 817F: MEX Queries
3486 Codeforces 817E: Choosing The Commander
3485 Codeforces 817D: Imbalanced Array
3484 Codeforces 817C: Really Big Numbers
3483 Codeforces 817B: Makes And The Product
3482 Codeforces 817A: Treasure Hunt
3481 Codeforces 816B: Karen and Coffee
3480 Codeforces 816A: Karen and Morning
3479 Codeforces 815E: Karen and Neighborhood
3478 Codeforces 815D: Karen and Cards
3477 Codeforces 815C: Karen and Supermarket
3476 Codeforces 815B: Karen and Test
3475 Codeforces 815A: Karen and Game
3474 Codeforces 814E: An unavoidable detour for home
3473 Codeforces 814D: An overnight dance in discotheque
3472 Codeforces 814C: An impassioned circulation of affection
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