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)
18751	DMOJ NOI '99 P3 - Birthday Cake
18750	DMOJ NOI '99 P2 - Nails and Ball
18749	DMOJ NOI '99 P1 - 01 Sequence
18748	DMOJ NOI '98 P6 - Parallel Computing
18747	DMOJ NOI '98 P5 - SERNET Simulation
18746	DMOJ NOI '98 P4 - Scarf Cutting
18745	DMOJ NOI '98 P3 - Software Installation Disk
18744	DMOJ NOI '98 P2 - Free Pizza
18743	DMOJ NOI '98 P1 - Personal Income Tax
18742	DMOJ NOI '97 P6 - Satellite Coverage
18741	DMOJ NOI '97 P5 - Building Game
18740	DMOJ NOI '97 P4 - Perfect Tour
18739	DMOJ NOI '97 P3 - File Matching
18738	DMOJ NOI '97 P2 - Optimal Routing
18737	DMOJ NOI '97 P1 - Competition Ranking
18736	DMOJ NOI '23 P6 - Merge the Books
18735	DMOJ NOI '23 P5 - String
18734	DMOJ NOI '23 P4 - Trade
18733	DMOJ NOI '23 P3 - Depth First Search
18732	DMOJ NOI '23 P2 - Osmanthus Tree
18731	DMOJ NOI '23 P1 - Square Coloring
18730	DMOJ NOI '22 P6: Quadratic Integer Program
18729	DMOJ NOI '22 P4: Challenge NPC
18728	DMOJ NOI '22 P3: Count
18727	DMOJ NOI '22 P2 - Stone
18726	DMOJ NOI '22 P1 - Major
18725	DMOJ NOI '21 P6 - Robot Game
18724	DMOJ NOI '21 P5 - The Locked Box
18723	DMOJ NOI '21 P4 - Quantum Communication
18722	DMOJ NOI '21 P3 - Celebration
18721	DMOJ NOI '21 P2 - Intersecting Paths
18720	DMOJ NOI '21 P1 - Light Heavy Edges
18719	DMOJ NOI '20 P6 - Road
18718	DMOJ NOI '20 P5 - Surreal
18717	DMOJ NOI '20 P4 - Dish
18716	DMOJ NOI '20 P3 - Tears
18715	DMOJ NOI '20 P2 - Destiny
18714	DMOJ NOI '20 P1 - Delicacy
18713	DMOJ NOI '19 P6 - Explore
18712	DMOJ NOI '19 P5 - Landlords
18711	DMOJ NOI '19 P4 - Jump
18710	DMOJ NOI '19 P3 - Sequence
18709	DMOJ NOI '19 P2 - Robot
18708	DMOJ NOI '19 P1 - Route
18707	DMOJ NOI '17 P6 - Magic
18706	DMOJ NOI '17 P5 - Vegetables
18705	DMOJ NOI '17 P3 - Pool
18704	DMOJ NOI '17 P2 - Queue
18703	DMOJ NOI '17 P1 - Integers
18702	DMOJ NOI '16 P6 - Computation

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

18751

DMOJ NOI '99 P3 - Birthday Cake

18750

DMOJ NOI '99 P2 - Nails and Ball

18749

DMOJ NOI '99 P1 - 01 Sequence

18748

DMOJ NOI '98 P6 - Parallel Computing

18747

DMOJ NOI '98 P5 - SERNET Simulation

18746