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
...
15
16
17
18
19
20
...
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
NOI '15 P2 - Software Package Manager
CCC '22 J3 - Harp Tuning
Knapsack 4
ECOO '17 R3 P1 - Baker Brie
CCC '08 S4 - Twenty-four
A Game
DMOPC '19 Contest 7 P5 - Soriya's Programming Project
Problem
Category
Points
AC %
▴
Users
DWITE '08 R5 #5 - Nash in Traffic
DWITE
10
25.8%
6
DWITE '07 R2 #3 - Floor Plan
DWITE
7
68.6%
124
DWITE '08 R3 #5 - Now in 3D
DWITE
7
78.7%
26
DWITE '08 R1 #2 - Simple Checksum
DWITE
3
51.0%
103
DWITE '11 R4 #5 - Comet Vomit
DWITE
12
47.6%
14
DWITE '11 R1 #2 - Penny Game
DWITE
5
24.3%
112
DWITE '11 R5 #4 - Cube World
DWITE
12
46.3%
70
DWITE '07 R1 #3 - Where's my QWERTY?
DWITE
3
41.3%
98
DWITE '12 R2 #4 - Magic Trick
DWITE
7
42.1%
212
DWITE '09 R3 #1 - Quiz Time
DWITE
3
46.1%
97
DWITE '10 R3 #1 - Integers along a line
DWITE
5
21.7%
24
DWITE '08 R2 #5 - Water damage
DWITE
7
22.4%
32
DWITE '07 R2 #1 - Not Quite Prime
DWITE
5
58.2%
320
DWITE '11 R1 #5 - Tattarrattat
DWITE
10
59.0%
147
DWITE '07 R5 #1 - I heart you
DWITE
3
31.4%
74
DWITE '09 R2 #3 - Binary Test String
DWITE
5
36.2%
38
DWITE '11 R4 #2 - Prime Time
DWITE
5
49.9%
263
DWITE '09 R3 #3 - Binary Test Strings 2
DWITE
5
73.2%
27
DWITE '09 R3 #2 - Rounding to Fibonacci
DWITE
5
63.4%
171
DWITE '11 R3 #2 - Magical Ponds
DWITE
5
30.0%
8
DWITE '09 R4 #1 - Social Media Overload
DWITE
3
65.9%
100
DWITE '12 R5 #4 - Fencing Problems
DWITE
5
15.5%
9
DWITE '11 R5 #5 - Binary Weight
DWITE
5
21.8%
34
DWITE '08 R4 #2 - Tic Tac Win
DWITE
5
43.3%
73
DWITE '09 R7 #1 - Binary Equipment
DWITE
3
43.5%
105
DWITE '10 R2 #1 - Pattern Matching
DWITE
3
40.1%
89
DWITE '12 R2 #3 - Bitstrings
DWITE
3
34.8%
117
DWITE '10 R3 #5 - E-Searching
DWITE
7
42.4%
10
DWITE '09 R5 #2 - Round to Second Prime
DWITE
5
58.5%
250
DWITE '11 R2 #2 - Scratch Card
DWITE
5
29.5%
35
DWITE '10 R4 #5 - Sleepwalking Probabilities
DWITE
5
71.4%
11
DWITE '09 R7 #3 - Oil Spill Area
DWITE
7
55.0%
79
DWITE '12 R5 #5 - Pattern Lock
DWITE
7
47.7%
21
DWITE '07 R4 #2 - And the winner is...
DWITE
5
35.3%
81
DWITE '10 R2 #4 - Fractions to Decimal
DWITE
7
37.7%
18
DWITE '10 R4 #4 - Mountain Hiking
DWITE
7
38.5%
72
DWITE '10 R3 #3 - Dominos Tiling
DWITE
10
46.3%
266
DWITE '07 R3 #5 - Portals
DWITE
7
48.9%
35
DWITE '09 R5 #4 - Kind of like OCR
DWITE
7
46.3%
18
DWITE '11 R1 #4 - C001 Numbers
DWITE
3
28.1%
85
DWITE '10 R1 #4 - Planting Trees
DWITE
7
50.0%
16
DWITE '11 R1 #3 - Take a Walk
DWITE
10
14.5%
18
DWITE '09 R2 #1 - Angles
DWITE
5
46.6%
18
DWITE '07 R3 #3 - Playlist
DWITE
7
43.8%
146
DWITE '07 R1 #2 - Cubes in a Pyramid
DWITE
3p
17.6%
344
DWITE '10 R4 #3 - Binary Weight
DWITE
5
21.3%
36
DWITE '10 R2 #2 - Seating Arrangement
DWITE
5
52.2%
8
DWITE '07 R3 #2 - There's An Essay In My Code
DWITE
5
30.2%
222
DWITE '07 R4 #4 - Shortest path around
DWITE
7
42.3%
186
DWITE '09 R6 #1 - ROT13 Encryption
DWITE
3
48.2%
95
«
1
2
...
15
16
17
18
19
20
...
99
100
»