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)
6621 Codeforces 1467D: Sum of Paths
6620 Codeforces 1467C: Three Bags
6619 Codeforces 1467B: Hills And Valleys
6618 Codeforces 1467A: Wizard of Orz
6617 Codeforces 1466I: The Riddle of the Sphinx
6616 Codeforces 1466H: Finding satisfactory solutions
6615 Codeforces 1466G: Song of the Sirens
6614 Codeforces 1466F: Euclid's nightmare
6613 Codeforces 1466E: Apollo versus Pan
6612 Codeforces 1466D: 13th Labour of Heracles
6611 Codeforces 1466C: Canine poetry
6610 Codeforces 1466B: Last minute enhancements
6609 Codeforces 1466A: Bovine Dilemma
6608 Codeforces 1464F: My Beautiful Madness
6607 Codeforces 1463F: Max Correct Set
6606 Codeforces 1463E: Plan of Lectures
6605 Codeforces 1463D: Pairs
6604 Codeforces 1463C: Busy Robot
6603 Codeforces 1463B: Find The Array
6602 Codeforces 1463A: Dungeon
6601 Codeforces 1462F: The Treasure of The Segments
6600 Codeforces 1462E2: Close Tuples (hard version)
6599 Codeforces 1462E1: Close Tuples (easy version)
6598 Codeforces 1462D: Add to Neighbour and Remove
6597 Codeforces 1462C: Unique Number
6596 Codeforces 1462B: Last Year's Substring
6595 Codeforces 1462A: Favorite Sequence
6594 Codeforces 1461F: Mathematical Expression
6593 Codeforces 1461E: Water Level
6592 Codeforces 1461D: Divide and Summarize
6591 Codeforces 1461C: Random Events
6590 Codeforces 1461B: Find the Spruce
6589 Codeforces 1461A: String Generation
6588 Codeforces 1459B: Move and Turn
6587 Codeforces 1459A: Red-Blue Shuffle
6586 Codeforces 1458F: Range Diameter Sum
6585 Codeforces 1458E: Nim Shortcuts
6584 Codeforces 1458D: Flip and Reverse
6583 Codeforces 1458C: Latin Square
6582 Codeforces 1458B: Glass Half Spilled
6581 Codeforces 1458A: Row GCD
6580 Codeforces 1456E: XOR-ranges
6579 Codeforces 1455G: Forbidden Value
6578 Codeforces 1455F: String and Operations
6577 Codeforces 1455E: Four Points
6576 Codeforces 1455D: Sequence and Swaps
6575 Codeforces 1455C: Ping-pong
6574 Codeforces 1455B: Jumps
6573 Codeforces 1455A: Strange Functions
6572 Codeforces 1454F: Array Partition
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