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Problem Category Points AC % ▾ Users
NOI '09 P4 - Plants vs. Zombies China NOI 25p 22.3% 33
DMOPC '18 Contest 5 P5 - A Hat Problem DMOPC 20p 22.3% 57
DMOPC '19 Contest 1 P2 - Good Writing DMOPC 7 22.3% 213
CCO '00 P5 - Millikan's Oil Droplet Experiment CCO 7 22.3% 54
UCC Coding Competition '21 P3 - Long Pizza Uncategorized 5p 22.2% 391
Strict Evaluation Data Structure Tests 17 22.2% 143
SAC '21 Code Challenge P5 - Friends of Friends SAC Coding Challenge 7p 22.2% 255
ECOO '16 R3 P2 - Target Practice ECOO 10p 22.2% 15
Tootsie Rolls Classics 12p 22.2% 10
WC '98 P1 - Optical Recognition Woburn Challenge 12 22.2% 4
COCI '20 Contest 1 #3 3D Histogram COCI 30p 22.2% 5
COCI '13 Contest 5 #4 Domine COCI 12p 22.2% 44
COCI '17 Contest 3 #5 Dojave COCI 17p 22.2% 9
DMOPC '20 Contest 5 P6 - Top Row (Offline Version) DMOPC 30p 22.2% 2
DMOPC '21 Contest 4 P3 - Palindromic Presents DMOPC 12p 22.2% 164
COI '14 #3 Ogledala COCI 30p 22.2% 2
Waterloo 2023 Winter B - Laser Trap Waterloo Local 12 22.2% 13
Google Code Jam '22 Round 1C Problem B - Squary Google Code Jam 10p 22.2% 5
Google Code Jam '08 Round 1A Problem C - Numbers Google Code Jam 20p 22.2% 4
Google Code Jam '11 Round 1A Problem B - The Killer Word Google Code Jam 12p 22.2% 2
Google Code Jam '12 Round 1A Problem B - Kingdom Rush Google Code Jam 7p 22.2% 2
DMOPC '21 Contest 5 P1 - Permutations & Primes DMOPC 5p 22.2% 401
COCI '16 Contest 3 #2 Pohlepko COCI 7p 22.2% 59
Appleby Contest '20 P1 - Terrific Triangles Uncategorized 3p 22.2% 521
LKP '18 Contest 2 P5 - Political Instability Uncategorized 17 22.1% 41
TLE '16 Contest 1 P2 - Heavy-Light Decomposition TLE 5p 22.1% 73
COCI '20 Contest 5 #5 Sjeckanje COCI 20p 22.1% 35
CCO Preparation Test 4 P3 - Dynamic MST Mock CCO 25p 22.1% 49
OCC '19 B4 - Bussing Olympiads School 5 22.1% 15
WC '02 P4 - It's Party Time Woburn Challenge 5 22.1% 80
MWC '15 #2 P4: Robotics Summative MWC 5p 22.1% 28
COCI '20 Contest 4 #3 Hop COCI 25p 22.1% 13
Distinct Shapes Uncategorized 10 22.1% 37
CCOQR '16 - Data Structure CCC 15p 22.1% 177
VM7WC '15 #2 Silver - 4 Nations, 1 Secret VM7WC 10 22.1% 202
Another Contest 6 Problem 13 - Boolean (Warmup) ACC 0p 22.0% 150
COI '06 #3 Sabor COCI 20p 22.0% 36
COCI '08 Contest 5 #3 Jagoda COCI 7 22.0% 28
Hashing Uncategorized 10 22.0% 15
DMOPC '18 Contest 2 P4 - Damage Output DMOPC 7p 22.0% 423
UTS Open '18 P1 - Love Triangle Uncategorized 3p 22.0% 368
IOI '06 P4 - The Valley of Mexico IOI 15p 22.0% 214
COCI '18 Contest 2 #4 Maja COCI 15p 22.0% 22
BSSPC '21 S3 - James's Egirl Discord Status Uncategorized 7p 22.0% 157
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand Mock CCC 12p 22.0% 29
Mock CCC '14 J1 - Love Overdose Mock CCC 3 22.0% 488
DWITE '09 R7 #4 - What is this Algebra? DWITE 12 22.0% 13
COCI '16 Contest 2 #6 Burza COCI 30p 22.0% 24
Mock CCO '18 Contest 2 Problem 4 - Victor's Rectangles Mock CCO 20p 21.9% 22
COCI '09 Contest 3 #5 Patuljci COCI 17p 21.9% 109