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.

Need help searching? Click for format/examples of problems

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)
16101	DMOJ COCI '07 Contest 4 #6 Kocke
16100	DMOJ COCI '07 Contest 4 #5 Poklon
16099	DMOJ COCI '07 Contest 4 #4 Muzicari
16098	DMOJ COCI '07 Contest 4 #3 Lektira
16097	DMOJ COCI '07 Contest 4 #2 Veci
16096	DMOJ COCI '07 Contest 4 #1 Vauvau
16095	DMOJ COCI '07 Contest 3 #6 Redoks
16094	DMOJ COCI '07 Contest 3 #5 Cudak
16093	DMOJ COCI '07 Contest 3 #4 Dejavu
16092	DMOJ COCI '07 Contest 3 #3 Tajna
16091	DMOJ COCI '07 Contest 3 #2 Oktalni
16090	DMOJ COCI '07 Contest 3 #1 Cetiri
16089	DMOJ COCI '07 Contest 2 #6 Pravokutni
16088	DMOJ COCI '07 Contest 2 #5 Kemija
16087	DMOJ COCI '07 Contest 2 #4 Turbo
16086	DMOJ COCI '07 Contest 2 #3 Prva
16085	DMOJ COCI '07 Contest 2 #2 Crne
16084	DMOJ COCI '07 Contest 2 #1 Bijele
16083	DMOJ COCI '07 Contest 1 #6 Staza
16082	DMOJ COCI '07 Contest 1 #5 Srednji
16081	DMOJ COCI '07 Contest 1 #4 Zapis
16080	DMOJ COCI '07 Contest 1 #3 Prinova
16079	DMOJ COCI '07 Contest 1 #2 PEG
16078	DMOJ COCI '07 Contest 1 #1 Cetvrta
16077	DMOJ COCI '06 Contest 6 #6 Prostor
16076	DMOJ COCI '06 Contest 6 #5 V
16075	DMOJ COCI '06 Contest 6 #4 Kamen
16074	DMOJ COCI '06 Contest 6 #3 Maraton
16073	DMOJ COCI '06 Contest 6 #2 Magija
16072	DMOJ COCI '06 Contest 6 #1 Prase
16071	DMOJ COCI '06 Contest 5 #6 Dvaput
16070	DMOJ COCI '06 Contest 5 #5 Ivana
16069	DMOJ COCI '06 Contest 5 #4 Liga
16068	DMOJ COCI '06 Contest 5 #3 Tenis
16067	DMOJ COCI '06 Contest 5 #2 Natrij
16066	DMOJ COCI '06 Contest 5 #1 Trik
16065	DMOJ COCI '06 Contest 4 #6 Ispiti
16064	DMOJ COCI '06 Contest 4 #5 Jogurt
16063	DMOJ COCI '06 Contest 4 #4 Zbrka
16062	DMOJ COCI '06 Contest 4 #3 Prsteni
16061	DMOJ COCI '06 Contest 4 #2 Skener
16060	DMOJ COCI '06 Contest 4 #1 Sibice
16059	DMOJ COCI '06 Contest 3 #6 Lista
16058	DMOJ COCI '06 Contest 3 #5 Bicikli
16057	DMOJ COCI '06 Contest 3 #4 Tenkici
16056	DMOJ COCI '06 Contest 3 #3 Trojke
16055	DMOJ COCI '06 Contest 3 #2 N-puzzle
16054	DMOJ COCI '06 Contest 3 #1 Patuljci
16053	DMOJ COCI '06 Contest 2 #6 Straža
16052	DMOJ COCI '06 Contest 2 #5 Stol

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

16101

DMOJ COCI '07 Contest 4 #6 Kocke

16100

DMOJ COCI '07 Contest 4 #5 Poklon

16099

DMOJ COCI '07 Contest 4 #4 Muzicari

16098

DMOJ COCI '07 Contest 4 #3 Lektira

16097

DMOJ COCI '07 Contest 4 #2 Veci

16096