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)
1571 Codeforces 354E: Lucky Number Representation
1570 Codeforces 354D: Transferring Pyramid
1569 Codeforces 354C: Vasya and Beautiful Arrays
1568 Codeforces 354B: Game with Strings
1567 Codeforces 354A: Vasya and Robot
1566 Codeforces 353E: Antichain
1565 Codeforces 353D: Queue
1564 Codeforces 353C: Find Maximum
1563 Codeforces 353B: Two Heaps
1562 Codeforces 353A: Domino
1561 Codeforces 352B: Jeff and Periods
1560 Codeforces 352A: Jeff and Digits
1559 Codeforces 351E: Jeff and Permutation
1558 Codeforces 351D: Jeff and Removing Periods
1557 Codeforces 351C: Jeff and Brackets
1556 Codeforces 351B: Jeff and Furik
1555 Codeforces 351A: Jeff and Rounding
1554 Codeforces 350E: Wrong Floyd
1553 Codeforces 350D: Looking for Owls
1552 Codeforces 350C: Bombs
1551 Codeforces 350B: Resort
1550 Codeforces 350A: TL
1549 Codeforces 349B: Color the Fence
1548 Codeforces 349A: Cinema Line
1547 Codeforces 348E: Pilgrims
1546 Codeforces 348D: Turtles
1545 Codeforces 348C: Subset Sums
1544 Codeforces 348B: Apple Tree
1543 Codeforces 348A: Mafia
1542 Codeforces 347B: Fixed Points
1541 Codeforces 347A: Difference Row
1540 Codeforces 346E: Doodle Jump
1539 Codeforces 346D: Robot Control
1538 Codeforces 346C: Number Transformation II
1537 Codeforces 346B: Lucky Common Subsequence
1536 Codeforces 346A: Alice and Bob
1535 Codeforces 345G: Suffix Subgroup
1534 Codeforces 345F: Superstitions Inspection
1533 Codeforces 345E: Black Cat Rush
1532 Codeforces 345D: Chain Letter
1531 Codeforces 345C: Counting Fridays
1530 Codeforces 345B: Triskaidekaphobia
1529 Codeforces 345A: Expecting Trouble
1528 Codeforces 344B: Simple Molecules
1527 Codeforces 344A: Magnets
1526 Codeforces 343E: Pumping Stations
1525 Codeforces 343D: Water Tree
1524 Codeforces 343C: Read Time
1523 Codeforces 343B: Alternating Current
1522 Codeforces 343A: Rational Resistance
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