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Problem Category Points AC % Users ▴
Baltic OI '10 P5 - Candies Baltic OI 17p 25.9% 19
COI '14 #2 Kovanice COCI 15p 12.1% 19
Spy Tree Uncategorized 15p 21.9% 19
NOI '16 P4 - Interval China NOI 20p 22.3% 19
DMOPC '22 Contest 3 P6 - Compressibility DMOPC 25p 8.0% 19
Mock CCC '23 1 S4 - Roger Says Yabe Mock CCC 15p 7.2% 19
Google Code Jam '22 Qualification Round Problem C - d1000000 Google Code Jam 5p 52.4% 19
Amplitude Hackathon '23 Problem 5 - Partition Assignment Uncategorized 7p 22.5% 19
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude! Uncategorized 5p 14.3% 19
COCI '23 Contest 4 #4 Putovanje COCI 20p 10.7% 19
CCO Preparation Test 3 P1 - Primitive Pythagorean Pairs Mock CCO 25p 13.7% 20
DMOPC '15 Contest 5 P6 - Event Horizon DMOPC 25p 11.1% 20
ICPC ECNA 2005 F - Square Count ICPC 15 39.5% 20
Facebook Hacker Cup '17 Qualifying Round P1 - Progress Pie FHC 5p 34.6% 20
ECOO '12 R2 P2 - Password Strength ECOO 5p 14.0% 20
COCI '08 Regional #5 Reljef COCI 15 52.8% 20
DWITE '11 R4 #3 - Breaking Bonds DWITE 7 45.7% 20
Ternary Search Tree Uncategorized 5 65.9% 20
Expected Value Uncategorized 15 24.5% 20
DMPG '19 G1 - Camera Calibration Challenge DMOPC 12p 7.5% 20
When GCD meets XOR Uncategorized 17 20.1% 20
COCI '18 Contest 6 #5 Mobitel COCI 20p 30.7% 20
CEOI '18 P3 - Lottery CEOI 25p 40.0% 20
Miniature Sudoku Uncategorized 7 31.9% 20
CCO '98 P2 - Message Deciphering CCO 7 51.9% 20
OCC '19 B5 - Gold Olympiads School 7 12.0% 20
A Permutation Problem 2 Uncategorized 12 30.7% 20
Mock CCC '20 Contest 1 J5 - A Prime Problem Mock CCC 12p 2.8% 20
NOI '98 P1 - Personal Income Tax China NOI 7 57.5% 20
NOI '13 P2 - Tree Count China NOI 25p 12.3% 20
NOI '13 P1 - Inner Product China NOI 20p 7.0% 20
SMAC 08/09 (Oct) #4 - Daycare Uncategorized 15p 4.5% 20
SMAC 08/09 (Nov) #1 - Befungulator Uncategorized 10 23.8% 20
WC '15 Contest 4 S3 - Coded Paper Woburn Challenge 17p 20.4% 20
The Codefather Uncategorized 15p 6.5% 20
Assembly Elves Uncategorized 10p 12.4% 20
COCI '09 Contest 6 #5 Holmes COCI 25p 28.4% 20
Secret Santa Uncategorized 15 13.0% 20
You Might be a Redneck Uncategorized 10p 8.8% 20
Baltic OI '05 P4 - Ancient Manuscript Baltic OI 12 33.3% 20
Baltic OI '05 P5 - Bus Trip Baltic OI 17 51.9% 20
JOI '16 Final P1 - Foehn Phenomena JOI 10p 65.1% 20
COCI '10 Contest 4 #3 Astro COCI 7p 39.0% 20
COCI '10 Contest 4 #5 Dugovi COCI 12p 36.0% 20
COCI '11 Contest 3 #3 Pogodak COCI 10p 36.8% 20
COCI '13 Contest 3 #3 Rečenice COCI 7p 42.6% 20
COCI '12 Contest 1 #5 Snaga COCI 12p 22.3% 20
Segment Tree Practice 4 Uncategorized 17 45.1% 20
COCI '17 Contest 7 #5 Dostavljač COCI 15 35.8% 20
Jack Needs Help Uncategorized 10p 32.0% 20