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)
24135 DMOJ Waterloo 2023 Fall E - Loose Goose
24134 DMOJ Waterloo 2023 Fall D - Reptilian Communism
24133 DMOJ Waterloo 2023 Fall C - Whitewater Rafting
24132 DMOJ Waterloo 2023 Fall B - Orb Tent
24131 DMOJ Waterloo 2023 Fall A - Black Frame
24130 DMOJ NOI '17 P4 - Game
23972 DMOJ APIO '22 P3 - Permutation
23908 DMOJ IOI '23 P6 - Robot Contest
23907 DMOJ IOI '23 P5 - Overtaking
23906 DMOJ IOI '23 P4 - Beech Tree
23884 DMOJ IOI '23 P3 - Soccer Stadium
23883 DMOJ IOI '23 P2 - Longest Trip
23882 DMOJ IOI '23 P1 - Closing Time
23831 DMOJ NOI '22 P6 - Quadratic Integer Program
23830 DMOJ NOI '22 P5 - Bubble Sort
23829 DMOJ NOI '22 P4 - Challenge NPC
23828 DMOJ NOI '22 P3 - Count
23818 DMOJ Yet Another Contest 7 P6 - Arithmetic Sequence Data Structure
23817 DMOJ Yet Another Contest 7 P5 - Egg Dropping
23816 DMOJ Yet Another Contest 7 P4 - Paparazzi
23815 DMOJ Yet Another Contest 7 P3 - No More Math Homework
23814 DMOJ Yet Another Contest 7 P2 - Coprime Grid
23813 DMOJ Yet Another Contest 7 P1 - Page Turning
23806 DMOJ NOIP '08 P3 - Message Passing
23805 DMOJ NOIP '08 P2 - Expression by Matches
23804 DMOJ NOIP '08 P1 - Silly Monkey
23803 DMOJ NOIP '07 P4 - Core of a Tree Net
23802 DMOJ NOIP '07 P3 - Removing Numbers from Matrix
23801 DMOJ NOIP '07 P2 - Expanding Strings
23800 DMOJ NOIP '07 P1 - Counting Numbers
23799 DMOJ IOI '04 P3 - Polygon
19827 DMOJ New Year's '19 P8 - Best Hat in Town II
19826 DMOJ New Year's '19 P7 - The Order of the Fox
19825 DMOJ New Year's '19 P6 - Buffer Zone
19824 DMOJ New Year's '19 P5 - Best Hat in Town
19823 DMOJ New Year's '19 P4 - A Button Challenge
19822 DMOJ New Year's '19 P3 - Santa's Journey
19821 DMOJ New Year's '19 P2 - Ball Sculpture
19820 DMOJ New Year's '19 P1 - Snowball Fight
19819 DMOJ New Year's '18 P8 - Snowy Streets
19818 DMOJ New Year's '18 P7 - Tree of Life
19817 DMOJ New Year's '18 P6 - Old Christmas Lights II
19816 DMOJ New Year's '18 P5 - Hanoi Heuristics
19815 DMOJ New Year's '18 P4 - The Polar Express
19814 DMOJ New Year's '18 P3 - World Domination Fun
19813 DMOJ New Year's '18 P2 - Mimi and Christmas Cake
19812 DMOJ New Year's '18 P1 - Happy New Year!
19811 DMOJ New Year's '17 P8 - Boxen in Boxen
19810 DMOJ New Year's '17 P7 - Santa's Deliveries
19809 DMOJ New Year's '17 P6 - Christmas Cards
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