Starlight: List of Problems

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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AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID	Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
16601	DMOJ COCI '21 Contest 1 #2 Kamenčići
16600	DMOJ COCI '21 Contest 1 #1 Ljeto
16599	DMOJ COCI '20 Contest 6 #5 Index
16598	DMOJ COCI '20 Contest 6 #4 Geometrija
16597	DMOJ COCI '20 Contest 6 #3 Anagramistica
16596	DMOJ COCI '20 Contest 6 #2 Alias
16595	DMOJ COCI '20 Contest 6 #1 Bold
16594	DMOJ COCI '20 Contest 5 #5 Sjeckanje
16593	DMOJ COCI '20 Contest 5 #4 Planine
16592	DMOJ COCI '20 Contest 5 #3 Magenta
16591	DMOJ COCI '20 Contest 5 #2 Po
16590	DMOJ COCI '20 Contest 5 #1 Šifra
16589	DMOJ COCI '20 Contest 4 #5 Patkice II
16588	DMOJ COCI '20 Contest 4 #4 Janjetina
16587	DMOJ COCI '20 Contest 4 #3 Hop
16586	DMOJ COCI '20 Contest 4 #2 Vepar
16585	DMOJ COCI '20 Contest 4 #1 Pizza
16584	DMOJ COCI '20 Contest 3 #5 Specijacija
16583	DMOJ COCI '20 Contest 3 #4 Selotejp
16582	DMOJ COCI '20 Contest 3 #3 Sateliti
16581	DMOJ COCI '20 Contest 3 #2 Vlak
16580	DMOJ COCI '20 Contest 3 #1 Knjige
16579	DMOJ COCI '20 Contest 2 #5 Svjetlo
16578	DMOJ COCI '20 Contest 2 #4 Sjekira
16577	DMOJ COCI '20 Contest 2 #3 Euklid
16576	DMOJ COCI '20 Contest 2 #2 Odašiljači
16575	DMOJ COCI '20 Contest 2 #1 Crtanje
16574	DMOJ COCI '20 Contest 1 #5 Tenis
16573	DMOJ COCI '20 Contest 1 #4 Papričice
16572	DMOJ COCI '20 Contest 1 #3 3D Histogram
16571	DMOJ COCI '20 Contest 1 #2 Bajka
16570	DMOJ COCI '20 Contest 1 #1 Patkice
16569	DMOJ COCI '19 Contest 6 #5 Trener
16568	DMOJ COCI '19 Contest 6 #4 Skandi
16567	DMOJ COCI '19 Contest 6 #3 Konstrukcija
16566	DMOJ COCI '19 Contest 6 #2 Birmingham
16565	DMOJ COCI '19 Contest 6 #1 Datum
16564	DMOJ COCI '19 Contest 5 #5 Zapina
16563	DMOJ COCI '19 Contest 5 #4 Putovanje
16562	DMOJ COCI '19 Contest 5 #3 Matching
16561	DMOJ COCI '19 Contest 5 #2 Političari
16560	DMOJ COCI '19 Contest 5 #1 Emacs
16559	DMOJ COCI '19 Contest 4 #5 Nivelle
16558	DMOJ COCI '19 Contest 4 #4 Klasika
16557	DMOJ COCI '19 Contest 4 #3 Holding
16556	DMOJ COCI '19 Contest 4 #2 Spiderman
16555	DMOJ COCI '19 Contest 3 #5 Sob
16554	DMOJ COCI '19 Contest 3 #4 Lampice
16553	DMOJ COCI '19 Contest 3 #3 Drvca
16552	DMOJ COCI '19 Contest 3 #2 Grudanje

Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)

16601

DMOJ COCI '21 Contest 1 #2 Kamenčići

16600

DMOJ COCI '21 Contest 1 #1 Ljeto

16599

DMOJ COCI '20 Contest 6 #5 Index

16598

DMOJ COCI '20 Contest 6 #4 Geometrija

16597

DMOJ COCI '20 Contest 6 #3 Anagramistica

16596