Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
IOI '23 P3 - Soccer Stadium IOI 30p 5.3% 21
IOI '23 P4 - Beech Tree IOI 35p 2.2% 5
IOI '23 P5 - Overtaking IOI 25p 5.4% 17
IOI '23 P6 - Robot Contest IOI 40p 5.9% 8
IOI '24 P1 - Nile IOI 15p 11.6% 76
IOI '24 P2 - Message IOI 40p 8.5% 30
IOI '24 P3 - Tree IOI 30p 4.3% 13
IOI '24 P4 - Hieroglyphs IOI 35p 3.9% 6
IOI '24 P5 - Mosaic IOI 20p 6.1% 22
IOI '24 P6 - Sphinx's Riddle IOI 25p 5.6% 8
IOI '25 P1 - Souvenirs IOI 25p 9.7% 37
IOI '25 P2 - Triple Peaks IOI 35p 2.0% 4
IOI '25 P3 - World Map IOI 30p 6.3% 13
IOI '25 P4 - Festival IOI 30p 4.0% 14
IOI '25 P5 - Migrations IOI 40p 3.8% 4
IOI '25 P6 - Obstacles IOI 35p 2.8% 4
IOI '94 P1 - The Triangle IOI 7p 56.9% 1633
IOI '94 P2 - The Castle IOI 10 18.9% 133
IOI '94 P4 - The Clocks IOI 10 27.0% 127
IOI '95 P1 - Packing Rectangles IOI 15p 44.2% 29
IOI '95 P2 - Shopping Offers IOI 15p 27.9% 43
IOI '95 P4 - Letter Game IOI 15p 26.7% 36
IOI '95 P5 - Street Race IOI 15p 23.3% 41
IOI '95 Practice Task 1 - Fence Factory IOI 15p 24.5% 12
IOI '95 Practice Task 2 - Word Chains IOI 12 43.2% 57
IOI '95 Practice Task 3 - Bar Codes IOI 12p 37.2% 24
IOI '96 P1 - A Game IOI 10 39.7% 298
IOI '96 P2 - Job Processing IOI 20p 29.6% 58
IOI '96 P3 - Network of Schools IOI 12p 24.4% 87
IOI '96 P4 - Sorting a Three-Valued Sequence IOI 10 28.1% 163
IOI '96 P5 - Longest Prefix IOI 12 20.9% 114
IOI '97 P1 - Mars Explorer IOI 20p 14.1% 18
IOI '97 P3 - The Toxic iShongololo IOI 20p 42.8% 8
IOI '97 P4 - Map Labelling IOI 20p 45.5% 6
IOI '98 P1 - Contact IOI 10p 9.5% 64
IOI '98 P2 - Starry Night IOI 15 32.7% 34
IOI '98 P3 - Party Lamps IOI 12p 33.9% 198
IOI '98 P4 - Picture IOI 15p 31.8% 251
IOI '98 P5 - Camelot IOI 15p 36.4% 52
IOI '98 P6 - Polygon IOI 15 32.5% 65
IOI '99 P1 - Little Shop of Flowers IOI 10 32.6% 259
IOI '99 P2 - Hidden Codes IOI 20p 14.9% 13
IOI '99 P4 - Traffic Lights IOI 15 31.5% 32
IOI '99 P5 - Flatten IOI 15p 22.4% 18
IOI '99 P6 - A Strip of Land IOI 20p 14.3% 39
IOIQR P5 - Some Game Seasonal 25 3.4% 3
Jack Needs Help Uncategorized 10p 33.9% 24
JOI '05 Final Round P1 - Questionnaire JOI 3p 29.5% 210
JOI '05 Final Round P2 - String JOI 5p 65.1% 235
JOI '05 Final Round P3 - Square JOI 5p 41.9% 162