Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
ACM U of T Tryouts C2 C - Homemade Asteroids ICPC 10 19.5% 27
NOI '97 P6 - Satellite Coverage China NOI 12p 39.5% 27
Bulgarian OI '09 P5 - Special Sequence Bulgarian OI 30p 14.0% 27
COCI '09 Contest 4 #5 Kaboom COCI 12 40.2% 27
ACSL '09 Practice P7 - Cube Uncategorized 15 16.1% 27
WC '99 P7 - The Rock Woburn Challenge 15 23.5% 27
Baltic OI '17 P5 - Plus Minus Baltic OI 15p 38.5% 27
Bus Stops Uncategorized 10 24.0% 27
COCI '11 Contest 1 #2 Matrix COCI 7p 32.2% 27
COCI '16 Contest 7 #4 Poklon COCI 15p 16.7% 27
COCI '17 Contest 6 #1 Davor COCI 5 52.8% 27
COCI '20 Contest 5 #3 Magenta COCI 12p 9.7% 27
Monkey Cards Uncategorized 12 30.4% 27
Baltic OI '07 P6 - Sequence Baltic OI 12p 27.2% 27
COI '17 #1 Paprike COCI 12p 52.9% 27
DMOPC '21 Contest 10 P6 - Median Replace DMOPC 25p 18.9% 27
Mock CCC '23 1 S3 - Richard The Penguin Mock CCC 10p 5.9% 27
Amplitude Hackathon '23 Practice Problem 5 - What is Spenser's Last Name? Uncategorized 0p 42.4% 27
STNBD P5 - Fianna Ray Ordesia Uncategorized 10p 12.0% 26
New Year's '15 P6 - Tiles Seasonal 20p 23.8% 26
UTS Open '15 #2 - Secret Code Uncategorized 10p 17.1% 26
Linked List Uncategorized 20p 6.9% 26
DMOPC '16 Contest 2 P6 - Console Simulator 2017 DMOPC 12p 12.0% 26
ICPC ECNA 2016 E - Red Rover ICPC 7 49.0% 26
TLE '16 Contest 5 P2 - Playing Piano TLE 10p 15.6% 26
TLE '16 Contest 6 (Mock CCC) S5 - Toll Routes TLE 20p 3.9% 26
DMPG '17 G1 - FatalWhale and Candies DMOPC 15p 13.2% 26
ECOO '17 R2 P3 - Lunch Time ECOO 12p 16.0% 26
ECOO '14 R3 P3 - Future City ECOO 10p 26.9% 26
TLE '17 Contest 1 P5 - Cake TLE 15p 15.0% 26
DWITE '09 R5 #5 - Weak Passwords DWITE 5 38.5% 26
DWITE '08 R3 #5 - Now in 3D DWITE 7 78.7% 26
ICHB Selection Contest '17 Problem 2 - Black Star's Visit Uncategorized 7p 8.5% 26
DMPG '18 G4 - Variation DMOPC 15p 31.5% 26
JOI '18 Open P1 - Bubble Sort 2 JOI 20p 5.2% 26
Triway Cup '19 Summer B - Cameras Seasonal 5 28.9% 26
Triway Cup '19 Summer E - Solar Power Seasonal 5 21.1% 26
Another Contest 5 Problem 4 - Tudor Interacts With Poop ACC 15p 16.1% 26
IOI '19 P2 - Split the Attractions IOI 40p 5.1% 26
DMOPC '19 Contest 5 P6 - Cecilia's Computational Crisis DMOPC 20p 8.2% 26
COCI '19 Contest 2 #3 Checker COCI 12p 28.7% 26
ACM U of T Tryouts C1 F - Foxic Expressions ICPC 15 15.1% 26
NOI '01 P6 - Secret of the Meteorite China NOI 15p 27.4% 26
Good Celebration Uncategorized 12 13.2% 26
IOI '95 P1 - Packing Rectangles IOI 15p 45.3% 26
WC '17 Contest 4 S1 - Wakandan Sabotage Woburn Challenge 10p 19.1% 26
WC '16 Contest 2 J2 - EHC Woburn Challenge 7p 11.1% 26
Secret Room Uncategorized 25p 8.4% 26
Path Finder 2: Electric Boogaloo Uncategorized 15p 23.0% 26
DMOPC '20 Contest 2 P6 - Unfair Game DMOPC 25p 16.0% 26