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Random
Hot problems
CCC '23 J3 - Special Event
CCC '24 S2 - Heavy-Light Composition
Problem
Category
Points
AC % ▾
Users
CCC '03 S2 - Poetry
CCC
5
17.3%
1454
APIO '10 P2 - Patrol
APIO
20p
17.3%
206
DMOPC '20 Contest 4 P2 - Beautiful Grids
DMOPC
7p
17.3%
153
CCO '09 P5 - Parade
CCO
17p
17.3%
43
Python Infinite Loop
Uncategorized
7p
17.3%
1876
IOI '17 P3 - Toy Train
IOI
30p
17.3%
40
Another Contest 3 Problem 1 - Diverse Arrays
ACC
7
17.2%
335
ECOO '15 R2 P2 - So So
ECOO
12p
17.2%
10
DMPG '18 B3 - Shimpossible
DMOPC
7p
17.2%
63
Mock CCC '14 J3 - Clock Hands
Mock CCC
5
17.2%
107
Mock CCO '17 Problem 4 - Guards
Mock CCO
15p
17.2%
52
Wesley's Anger Contest 5 Problem 4 - Prison Escape
WAC
17p
17.2%
44
Baltic OI '07 P1 - Escape
Baltic OI
20p
17.2%
39
TLE '17 Contest 7 P3 - Countless Calculator Computations
TLE
7p
17.2%
142
ACM U of T Tryouts C3 F - A Pleasant Stroll
ICPC
15
17.2%
29
COCI '17 Contest 6 #3 Mate
COCI
12p
17.2%
18
Another Contest 5 Problem 5 - Another Cheese Problem
ACC
12
17.2%
64
WC '17 Contest 3 S2 - GleamingProudChickenFunRun
Woburn Challenge
12p
17.1%
51
ECOO '20 P4 - Ring
ECOO
12p
17.1%
78
CCO '19 P3 - Winter Driving
CCO
30p
17.1%
66
JOI '22 Open P1 - Seesaw
JOI
17p
17.1%
6
VM7WC '16 #6 Silver - Diana Socializes
VM7WC
7
17.1%
59
Cheerio Contest 1 S4 - Mystery Boxes
Uncategorized
10p
17.1%
40
Mock CCC '19 Contest 1 J5 - Pusheen Designs a Sushi Boat
Mock CCC
7p
17.1%
235
COI '20 #2 Cigle
COCI
20p
17.1%
20
T-800's Escape
Uncategorized
10
17.1%
33
UTS Open '15 #2 - Secret Code
Uncategorized
10p
17.1%
26
TLE '16 Contest 6 (Mock CCC) S3 - Hyper Fax
TLE
15p
17.1%
152
CCO '01 P2 - Coke or Chocolate Milk
CCO
12
17.1%
11
BPC 1 S1 - Homework Questions
Uncategorized
5
17.1%
157
Prime Street
Uncategorized
10
17.1%
31
DMOPC '13 Contest 1 P5 - Math on Titan
DMOPC
15p
17.0%
40
TLE '16 Contest 7 P1 - Math Helper
TLE
5p
17.0%
38
CTU Open Contest 2017 - Shooting Gallery
ICPC
10
17.0%
10
Magic Maze
Uncategorized
17p
17.0%
22
TLE '16 Contest 3 P5 - LAN Party
TLE
15p
17.0%
46
TLE '15 P4 - Olympiads Homework
TLE
12p
17.0%
120
DMPG '15 S4 - Signal Hill
DMOPC
10
17.0%
176
Bank Notes
Uncategorized
7
17.0%
144
APIO '09 P1 - Digging for Oil
APIO
20p
17.0%
134
Mock CCC '23 Contest 1 J4 - String Decryption
Mock CCC
5p
17.0%
166
Google Kickstart '17 Round C Problem B - X Squared
Google Kick Start
7p
17.0%
47
THICC '17 P1 - Carol's Carnivorous Plants
Uncategorized
5p
17.0%
126
HCI '16 - Ulam Spiral
Uncategorized
5p
17.0%
34
ACM U of T Tryouts C2 F - Light Cyclin'
ICPC
20
16.9%
68
DMOPC '18 Contest 6 P2 - Enantiomers
DMOPC
7
16.9%
55
The Torture Chamber
Uncategorized
15
16.9%
239
DMOJ Capture The Flag '20 B1 - Super Secure Pseudorandom Number Generator
CTF
5
16.9%
49
Summer Institute '17 Contest 1 P1 - Ant Clans
SIUCF
20p
16.9%
30
TLE '17 Contest 6 P1 - Molecules
TLE
3p
16.9%
116
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