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)
1671 Codeforces 379D: New Year Letter
1670 Codeforces 379C: New Year Ratings Change
1669 Codeforces 379B: New Year Present
1668 Codeforces 379A: New Year Candles
1667 Codeforces 378B: Semifinals
1666 Codeforces 378A: Playing with Dice
1665 Codeforces 377E: Cookie Clicker
1664 Codeforces 377D: Developing Game
1663 Codeforces 377C: Captains Mode
1662 Codeforces 377B: Preparing for the Contest
1661 Codeforces 377A: Maze
1660 Codeforces 376B: I.O.U.
1659 Codeforces 376A: Lever
1658 Codeforces 375E: Red and Black Tree
1657 Codeforces 375D: Tree and Queries
1656 Codeforces 375C: Circling Round Treasures
1655 Codeforces 375B: Maximum Submatrix 2
1654 Codeforces 375A: Divisible by Seven
1653 Codeforces 374E: Inna and Babies
1652 Codeforces 374D: Inna and Sequence
1651 Codeforces 374C: Inna and Dima
1650 Codeforces 374B: Inna and Nine
1649 Codeforces 374A: Inna and Pink Pony
1648 Codeforces 373B: Making Sequences is Fun
1647 Codeforces 373A: Collecting Beats is Fun
1646 Codeforces 372E: Drawing Circles is Fun
1645 Codeforces 372D: Choosing Subtree is Fun
1644 Codeforces 372C: Watching Fireworks is Fun
1643 Codeforces 372B: Counting Rectangles is Fun
1642 Codeforces 372A: Counting Kangaroos is Fun
1641 Codeforces 371E: Subway Innovation
1640 Codeforces 371D: Vessels
1639 Codeforces 371C: Hamburgers
1638 Codeforces 371B: Fox Dividing Cheese
1637 Codeforces 371A: K-Periodic Array
1636 Codeforces 370E: Summer Reading
1635 Codeforces 370D: Broken Monitor
1634 Codeforces 370C: Mittens
1633 Codeforces 370B: Berland Bingo
1632 Codeforces 370A: Rook, Bishop and King
1631 Codeforces 369E: Valera and Queries
1630 Codeforces 369D: Valera and Fools
1629 Codeforces 369C: Valera and Elections
1628 Codeforces 369B: Valera and Contest
1627 Codeforces 369A: Valera and Plates
1626 Codeforces 368B: Sereja and Suffixes
1625 Codeforces 368A: Sereja and Coat Rack
1624 Codeforces 367E: Sereja and Intervals
1623 Codeforces 367D: Sereja and Sets
1622 Codeforces 367C: Sereja and the Arrangement of Numbers
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