Home
Problems
Submissions
Users
Contests
About
>
Status
Tips
API
Github
Log in
or
Sign up
This site works best with JavaScript enabled.
Problems
«
1
2
...
36
37
38
39
40
41
...
99
100
»
Problem search
Full text search
Has editorial
Show problem types
Category
All
---
AAC
ACC
APIO
Balkan OI
Baltic OI
BlueBook
Brazil OI
Bubble Cup
Bulgarian OI
CCC
CCO
CEOI
China NOI
Classics
COCI
CSPC
CTF
Data Structure Tests
DMOPC
DWITE
ECOO
EGOI
ESOI
FHC
Fun Math
GFSSOC
Google Code Jam
Google Hash Code
Google Kick Start
ICPC
IOI
JOI
Mock CCC
Mock CCO
MWC
Olympiads School
POI
SAC Coding Challenge
Seasonal
SIUCF
Taiwan NOI
TLE
TSOC
Uncategorized
VM7WC
WAC
Waterloo Local
Woburn Challenge
YAC
Point range
Go
Random
Hot problems
CCC '00 S1 - Slot Machines
Knapsack 4
ICPC PACNW 2016 A - Alphabet
COCI '10 Contest 4 #2 Parket
Educational DP Contest AtCoder B - Frog 2
CCC '23 S2 - Symmetric Mountains
Another Random Contest 1 P5 - A Strange Country
Problem
Category
Points
AC % ▾
Users
COCI '21 Contest 1 #2 Kamenčići
COCI
10p
30.7%
66
COCI '18 Contest 6 #5 Mobitel
COCI
20p
30.7%
20
TSOC '15 Contest 1 #5 - Giant Ants
TSOC
7p
30.7%
407
A Permutation Problem 2
Uncategorized
12
30.7%
20
COCI '18 Contest 4 #2 Wand
COCI
7p
30.6%
158
COCI '19 Contest 5 #2 Političari
COCI
7p
30.6%
92
NOI '22 P4 - Challenge NPC
China NOI
25p
30.6%
4
CCCJQR P4
Seasonal
0
30.6%
29
TLE '16 Contest 3 P4 - Gaussian Elimination
TLE
7p
30.6%
137
A Simple Game
Uncategorized
7p
30.6%
84
IOI '99 P1 - Little Shop of Flowers
IOI
10
30.6%
204
TLE '15 P6 - Rock, Paper, Scissors
TLE
20p
30.6%
56
ECOO '16 R2 P2 - CC+
ECOO
7p
30.6%
51
WC '16 Contest 4 S2 - Pawpsicles
Woburn Challenge
12p
30.6%
35
EGOI '23 P4 - Bikes vs Cars
EGOI
20p
30.6%
10
COCI '13 Contest 1 #3 Ratar
COCI
15p
30.5%
56
CCC '17 S3 - Nailed It!
CCC
7p
30.5%
1712
Back To School '16: Harambe
Seasonal
3p
30.5%
912
DMPG '19 B3 - Contact
DMOPC
3
30.5%
231
CCC '08 S2 - Pennies in the Ring
CCC
5
30.5%
1182
WC '97 P4 - Typing
Woburn Challenge
5
30.5%
248
DMPG '16 S3 - The Faster Way
DMOPC
10p
30.5%
82
CCO '08 P1 - Moving Day
CCO
7p
30.5%
106
The Cosmic Era P3 - Battle Positions
Uncategorized
7
30.4%
983
ICPC ECNA 2019 C - Cheese, If You Please
ICPC
25
30.4%
3
COCI '09 Contest 5 #5 Program
COCI
12
30.4%
96
Baltic OI '10 P1 - BEARs
Baltic OI
15
30.4%
5
COI '12 #4 Spijuni
COCI
10p
30.4%
24
COCI '08 Contest 4 #4 Slikar
COCI
17p
30.4%
129
Amplitude Hackathon '23 Problem 1 - Company Values
Uncategorized
0p
30.4%
49
UTS Open '15 #4 - Subway
Uncategorized
17p
30.4%
72
Non-space-separated
Uncategorized
10
30.4%
44
Monkey Cards
Uncategorized
12
30.4%
27
TLE '16 Contest 2 P1 - In Debt
TLE
3p
30.4%
177
COCI '07 Contest 6 #5 Princeza
COCI
15
30.4%
51
DWITE '12 R2 #1 - Sugar Rush
DWITE
3
30.4%
101
COCI '19 Contest 3 #5 Sob
COCI
15p
30.3%
34
COCI '12 Contest 5 #2 Arhipelag
COCI
7p
30.3%
33
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
DMOPC
5p
30.3%
292
Longest Balanced Subsequence
Uncategorized
15p
30.3%
28
CCO '07 P6 - Road Construction
CCO
20p
30.3%
180
BSSPC '21 S2 - Hacker Soup
Uncategorized
7p
30.3%
148
New Year's '16 P1 - Late Christmas Shopping
Seasonal
3p
30.3%
180
WC '17 Contest 1 S2 - Ride the Rocket
Woburn Challenge
10p
30.3%
29
Baltic OI '16 P6 - Swap
Baltic OI
15p
30.3%
7
WC '17 Contest 1 S3 - Crosscountry Canada
Woburn Challenge
15p
30.3%
33
MWC '15 #5 P3: French Words
MWC
5p
30.3%
120
IOI '21 P4 - Mutating DNA
IOI
12p
30.3%
73
DMOPC '15 Contest 2 P4 - Personal Assistant
DMOPC
12p
30.3%
245
Triway Cup '19 Summer Junior P2 - Thanos Knows the Most
Seasonal
5
30.2%
70
«
1
2
...
36
37
38
39
40
41
...
99
100
»