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Problem Category Points AC % Users ▴
COCI '19 Contest 2 #1 ACM COCI 5p 52.4% 10
Tootsie Rolls Classics 12p 22.2% 10
NOI '00 P2 - Program Parser China NOI 12p 11.5% 10
NOI '08 P5 - Candy Rain China NOI 30p 14.7% 10
NOI '11 P2 - Intelligent Car Racing China NOI 25p 12.2% 10
NOI '12 P3 - Magic Chessboard China NOI 40p 6.2% 10
NOI '12 P4 - Lost in the Park China NOI 20p 10.9% 10
IOI '95 Practice Task 1 - Fence Factory IOI 15p 21.7% 10
IOI '99 P2 - Hidden Codes IOI 20p 14.4% 10
NOI '19 P6 - Explore China NOI 25p 2.6% 10
COCI '12 Contest 1 #3 Koncert COCI 7 25.4% 10
WC '17 Contest 2 S4 - One Does Not Simply Walk Into Mordor Woburn Challenge 17p 16.5% 10
WC '01 Suicidal P5 - The Mole Woburn Challenge 15p 15.1% 10
WC '97 P1 - Searching Quickly Woburn Challenge 10 30.0% 10
WC '01 Suicidal P6 - Blind Date Woburn Challenge 20p 32.8% 10
Maximum Independent Subset Uncategorized 15p 12.6% 10
WCIPEG 2018 ECOO Qualifier P3 - Shattering Shadows 2 ECOO 7p 19.4% 10
WCIPEG 2018 ECOO Qualifier P4 - IOI tour ECOO 10p 24.4% 10
UTS Open '21 P7 - April Fools Uncategorized 30p 8.6% 10
COCI '13 Contest 3 #4 Kolinje COCI 10p 32.5% 10
COCI '12 Contest 3 #5 Herkabe COCI 12p 21.3% 10
COCI '12 Contest 5 #3 Totem COCI 10p 13.8% 10
Spring Coding Bowl '22 P4 - Circle Game Uncategorized 15p 6.7% 10
DMOPC '21 Contest 2 P6 - Strange Function DMOPC 30p 13.2% 10
Number Theoretic Transform Uncategorized 12 25.3% 10
COI '16 #4 Zagrade COCI 25p 25.0% 10
BPC 1 S5 - Temple Uncategorized 25p 7.2% 10
DMOPC '21 Contest 9 P6 - Shortest Paths DMOPC 30p 33.3% 10
Baltic OI '13 P4 - Brunhilda's Birthday Baltic OI 15p 27.0% 10
NOIP '20 P2 - String Matching China NOI 12p 13.5% 10
IOI '12 P4 - Ideal City IOI 25p 25.0% 10
Yet Another Contest 8 P5 - Hidden Tree YAC 20p 5.0% 10
Mock CCC '23 1 S5 - The Obligatory Data Structures Problem Mock CCC 25p 14.0% 10
Google Code Jam '12 Qualification Round Problem A - Speaking in Tongues Google Code Jam 3p 36.8% 10
Google Code Jam '15 Qualification Round Problem A - Standing Ovation Google Code Jam 3p 55.6% 10
EGOI '23 P4 - Bikes vs Cars EGOI 20p 30.6% 10
NOI '17 P1 - Integers China NOI 20p 29.1% 10
NOI '23 P1 - Square Coloring China NOI 17p 52.6% 10
COCI '23 Contest 1 #5 Mostovi COCI 30p 32.8% 10
WOSS Dual Olympiad 2023 Team Round P3: Choosing Edges Uncategorized 12 8.7% 10
DMPG '16 G3 - Guerrilla Warfare DMOPC 20p 16.3% 11
DMPG '16 S6 - Black and White II DMOPC 15p 24.4% 11
New Year's '17 P8 - Boxen in Boxen Seasonal 25 6.5% 11
TLE '16 Contest 6 (Mock CCC) S4 - Bubble Sort TLE 25p 6.4% 11
Waterloo 2017 Winter E - Vera and Love Triangles Waterloo Local 25 37.8% 11
DMPG '17 G4 - Timeline DMOPC 20p 20.3% 11
ECOO '13 R2 P4 - Breaking Rocks ECOO 10p 60.9% 11
Waterloo 2017 Fall B - Biology Waterloo Local 5p 48.6% 11
DWITE '10 R4 #5 - Sleepwalking Probabilities DWITE 5 71.4% 11
DWITE '09 R6 #3 - Bill Amendments DWITE 5 25.5% 11