Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points ▾ AC % Users
APIO '09 P3 - The Great ATM Robbery APIO 20p 7.5% 126
CCO '09 P1 - Invasion of the Boxes CCO 20p 12.8% 22
CCO '09 P2 - Dinner CCO 20p 9.8% 50
CCO '09 P4 - Bottle Caps CCO 20p 14.2% 37
Fast Matrix Multiplication Classics 20p 0.0% 0
VPEX P5 - Points Redistribution Uncategorized 20p 24.4% 54
CCO '19 P2 - Sirtet CCO 20p 24.3% 81
CCO '19 P6 - Bad Codes CCO 20p 25.4% 68
Bane of Arthropods Uncategorized 20p 62.5% 2
APIO '19 P1 - Strange Device APIO 20 21.1% 50
Educational DP Contest AtCoder V - Subtree Uncategorized 20 29.5% 97
Educational DP Contest AtCoder W - Intervals Uncategorized 20 49.4% 76
Back To School '19: FFT Fun Seasonal 20p 14.6% 16
APIO '17 P2 - Travelling Merchant APIO 20p 23.2% 46
APIO '08 P2 - Roads APIO 20p 16.1% 82
IOI '05 P3 - Mountain IOI 20p 13.5% 295
CEOI '16 P2 - Kangaroo CEOI 20p 43.3% 64
IOI '19 P5 - Vision Program IOI 20p 8.0% 32
CEOI '19 P5 - Magic Tree CEOI 20p 9.3% 34
CEOI '19 P3 - Cubeword CEOI 20p 40.5% 13
DMOPC '19 Contest 2 P6 - Two Roots DMOPC 20p 11.8% 22
CERC '07 E - Gates of Logic ICPC 20p 26.8% 6
Baltic OI '13 P6 - Vim Baltic OI 20p 17.6% 3
Baltic OI '19 P6 - Olympiads Baltic OI 20p 20.3% 34
DMOPC '19 Contest 2 P5 - Connections DMOPC 20 6.9% 12
Palindrome Path Olympiads School 20p 12.8% 9
Angie and Functions Uncategorized 20p 23.6% 15
Wesley's Anger Contest 2 Problem 4 - The Ninth Triangle of the Underworld WAC 20 14.1% 11
DMOPC '19 Contest 7 P4 - Bob and Continued Fractions DMOPC 20p 20.9% 108
Educational DP Contest AtCoder X - Tower Uncategorized 20 49.3% 67
COCI '19 Contest 1 #3 Džumbus COCI 20p 20.9% 29
GlobeX Cup '19 S5 - Alien Navigation Uncategorized 20p 7.4% 16
DMOPC '19 Contest 3 P5 - Festival DMOPC 20 11.5% 23
COCI '19 Contest 2 #4 Popcount COCI 20p 12.0% 3
COCI '19 Contest 2 #5 Zvijezda COCI 20p 24.0% 31
Art Academy III: Sabotage Uncategorized 20p 11.0% 7
Educational DP Contest AtCoder Z - Frog 3 Uncategorized 20 38.3% 158
Figurines Uncategorized 20 21.1% 29
Mock CCC '20 S4 - Valentine's Day Shopping Mock CCC 20p 7.9% 15
Mock CCC '20 Contest 2 S5 - Sticks Mock CCC 20p 1.9% 3
DMOPC '19 Contest 5 P6 - Cecilia's Computational Crisis DMOPC 20p 8.2% 26
PIB '20 P6 - Rotational Top Trees Uncategorized 20p 35.3% 15
COCI '19 Contest 6 #3 Konstrukcija COCI 20p 21.4% 2
ICPC NEERC 2018 J - JS Minification ICPC 20 32.4% 4
JOI '18 Spring Camp Day 1 P3 - Tents JOI 20p 71.1% 28
Grid 3 Uncategorized 20 38.5% 16
DMOPC '19 Contest 7 P5 - Soriya's Programming Project DMOPC 20p 17.6% 116
JOI '16 Open P2 - Selling RNA Strands JOI 20 15.2% 15
COCI '15 Contest 7 #6 Prokletnik COCI 20 21.6% 15
COCI '17 Contest 1 #6 Plahte COCI 20 35.5% 15