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
...
74
75
76
77
78
79
...
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 '24 J3 - Bronze Count
COCI '08 Contest 4 #6 Periodni
COCI '23 Contest 5 #4 Rolete
COCI '23 Contest 5 #1 Zlagalica
APIO '09 P1 - Digging for Oil
CCC '24 J5 - Harvest Waterloo
CCC '24 J4 - Troublesome Keys
Problem
Category
Points
AC % ▴
Users
COCI '06 Regional #3 Firefly
COCI
10
38.0%
205
DWITE '06 R5 #3 - UPC Check Digit
DWITE
5
38.0%
100
MWC '15 #7 P2: Thief in the Night
MWC
5p
38.1%
183
CCC '23 J3 - Special Event
CCC
5p
38.1%
1237
Hardcore Grinding
Uncategorized
5
38.1%
465
Polynomial Time Boolean Satisfiability
Uncategorized
15p
38.1%
49
Wesley's Anger Contest 3 Bonus Problem - Game of Death
WAC
7p
38.1%
13
DMOJ Capture The Flag '20 F4 - Wire on Shark
CTF
10
38.1%
7
COCI '12 Contest 2 #6 Inspektor
COCI
25p
38.1%
4
COCI '17 Contest 6 #4 Cover
COCI
15
38.1%
39
COCI '10 Contest 1 #2 Profesor
COCI
5p
38.1%
74
CCCHK '08 J1 - Best fish
CCC
3
38.2%
797
CEOI '18 P4 - Fibonacci Representations
CEOI
40p
38.2%
8
DWITE '08 R4 #3 - Secret party
DWITE
7
38.2%
53
WOSS Dual Olympiad 2023 J3/S1: Moving Sand
Uncategorized
7
38.2%
114
Inaho X
Uncategorized
7p
38.2%
11
Pulse
Uncategorized
3
38.3%
374
Willie's Fan Club
Uncategorized
7
38.3%
41
ECOO '14 R1 P4 - Fischer Random Chess
ECOO
5p
38.3%
35
COCI '11 Contest 3 #2 D'hondt
COCI
5p
38.3%
12
VM7WC '15 #1 Bronze - Goon
VM7WC
3
38.3%
530
ECOO '13 R2 P1 - Upsetris
ECOO
5p
38.4%
32
DWITE '09 R1 #4 - My First True Letter
DWITE
3
38.4%
103
NOIP '08 P1 - Silly Monkey
China NOI
5p
38.4%
29
Baltic OI '16 P4 - Cities
Baltic OI
15p
38.4%
25
QCC P6 - Freedom!
Uncategorized
7p
38.4%
70
DWITE '09 R5 #5 - Weak Passwords
DWITE
5
38.5%
26
DWITE '10 R4 #4 - Mountain Hiking
DWITE
7
38.5%
72
CTU Open Contest 2018 - Moving Furniture
ICPC
20
38.5%
4
WC '01 P2 - The Island Of Dr. Strangelove
Woburn Challenge
10
38.5%
8
Baltic OI '17 P5 - Plus Minus
Baltic OI
15p
38.5%
27
TTC
Uncategorized
3
38.5%
104
COCI '11 Contest 2 #6 Raspored
COCI
15p
38.5%
5
COCI '23 Contest 5 #3 Piratski Kod
COCI
15p
38.5%
5
CCO '17 P1 - Vera and Trail Building
CCO
7p
38.5%
412
CCO '18 P1 - Geese vs. Hawks
CCO
10p
38.5%
541
SAC '22 Code Challenge 4 P3 - Obligatory Math Problem
SAC Coding Challenge
5
38.5%
205
DMOJLand Series: Fake Judges
Olympiads School
7p
38.5%
159
COCI '16 Contest 6 #3 Turnir
COCI
7
38.5%
48
DMOPC '14 Contest 2 P2 - Cutting Logs
DMOPC
5p
38.5%
539
Grid 3
Uncategorized
20
38.5%
16
DMPG '15 S1 - Collecting Dust
DMOPC
5
38.5%
272
Mock CCC '23 Contest 1 J2 - Healthy Schedule
Mock CCC
3
38.6%
556
COCI '12 Contest 4 #4 Razlika
COCI
12p
38.6%
21
Educational DP Contest AtCoder Z - Frog 3
Uncategorized
20
38.6%
156
DWITE '08 R2 #3 - My drink is made of cubes
DWITE
5
38.6%
20
NOIP '15 P5 - Substring
China NOI
12p
38.6%
11
CCC '01 S3 - Strategic Bombing
CCC
7
38.6%
1448
DWITE '02 R2 #5 - Now I know my ABCs
DWITE
5
38.6%
131
Binary Search Tree Test
Data Structure Tests
15
38.6%
194
«
1
2
...
74
75
76
77
78
79
...
99
100
»