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
...
98
99
100
101
102
103
»
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 '25 J3 - Product Codes
CCC '25 J5 - Connecting Territories
CCC '25 J4 - Sunny Days
DWITE '08 R3 #4 - Time for change
COCI '15 Contest 2 #1 Marko
CCC '25 S2 - Cryptogram Cracking Club
COCI '06 Regional #1 Bard
Problem
Category
Points
AC %
Users
WOSS Dual Olympiad 2023 S2: Geese Attack
Uncategorized
10
12.3%
40
WOSS Dual Olympiad 2023 S3: Flying
Uncategorized
15p
25.0%
19
WOSS Dual Olympiad 2023 Team Round P1: Combining Candy Canes
Uncategorized
5
33.7%
54
WOSS Dual Olympiad 2023 Team Round P2: Holding Eggnog
Uncategorized
7
35.8%
33
WOSS Dual Olympiad 2023 Team Round P3: Choosing Edges
Uncategorized
12
8.9%
11
William and Summation
Uncategorized
7p
26.7%
64
X Diagonal
Uncategorized
5p
30.1%
12
A Very Coordinated Christmas
Uncategorized
7p
34.4%
120
XOR
Uncategorized
7
41.8%
369
XOR Minimum
Uncategorized
17p
36.4%
156
XOR Sum
Uncategorized
10
46.0%
247
James' XOR Update
Uncategorized
12p
28.3%
34
Crosswords
Uncategorized
15p
17.4%
4
Yet Another Contest 1 P1 - Mixed Doubles
YAC
7p
16.8%
231
Yet Another Contest 1 P2 - A Boring Problem
YAC
10p
13.2%
91
Yet Another Contest 1 P3 - Fluke
YAC
10p
17.0%
104
Yet Another Contest 1 P4 - No More Searching
YAC
12p
19.1%
54
Yet Another Contest 1 P5 - Hopping Kangaroos
YAC
17p
12.1%
19
Yet Another Contest 1 P6 - Alchemy
YAC
20p
15.8%
15
Yet Another Contest 2 P1 - Betting
YAC
5p
21.0%
265
Yet Another Contest 2 P2 - Secret Sequence
YAC
7p
26.6%
139
Yet Another Contest 2 P3 - Maximum Damage
YAC
10p
7.9%
63
Yet Another Contest 2 P4 - No More Arithmetic
YAC
15p
15.2%
52
Yet Another Contest 2 P5 - Mirror Maze
YAC
17p
28.9%
46
Yet Another Contest 2 P6 - Travel Budget
YAC
20p
15.0%
39
Yet Another Contest 3 P1 - Shell Swap Scam
YAC
5p
24.1%
194
Yet Another Contest 3 P2 - Work Experience
YAC
10p
22.4%
72
Yet Another Contest 3 P3 - Topography
YAC
15p
2.4%
17
Yet Another Contest 3 P4 - Rumour
YAC
15p
27.3%
80
Yet Another Contest 3 P5 - No More Thieves
YAC
25p
12.6%
7
Yet Another Contest 4 P1 - Snap
YAC
5p
46.8%
270
Yet Another Contest 4 P2 - Alchemy 2
YAC
7p
26.2%
164
Yet Another Contest 4 P3 - Canadian Cactus Competition
YAC
12p
10.1%
54
Yet Another Contest 4 P4 - Even The Odds
YAC
20p
3.9%
12
Yet Another Contest 4 P5 - Signpost
YAC
20p
19.5%
25
Yet Another Contest 4 P6 - No More Solitaire
YAC
20p
6.7%
24
Yet Another Contest 5 P1 - Number Pyramid
YAC
7p
19.6%
196
Yet Another Contest 5 P2 - Big Score
YAC
10p
13.6%
102
Yet Another Contest 5 P3 - Potted Plants
YAC
12p
16.1%
70
Yet Another Contest 5 P4 - Nils++
YAC
17p
2.5%
7
Yet Another Contest 5 P5 - No More Concerts
YAC
20p
11.0%
12
Yet Another Contest 6 P1 - No More Separation
YAC
5p
33.8%
330
Yet Another Contest 6 P2 - No More Telemarketers
YAC
7p
16.3%
129
Yet Another Contest 6 P3 - No More Cell Phone Messaging
YAC
10p
13.4%
114
Yet Another Contest 6 P4 - No More Nails!
YAC
12p
11.4%
54
Yet Another Contest 6 P5 - No More Coyotes
YAC
15p
22.5%
25
Yet Another Contest 6 P6 - No More Snakes and Ladders
YAC
17p
18.0%
22
Yet Another Contest 7 P1 - Page Turning
YAC
5p
19.6%
287
Yet Another Contest 7 P2 - Coprime Grid
YAC
10p
22.4%
213
Yet Another Contest 7 P3 - No More Math Homework
YAC
12p
16.3%
90
«
1
2
...
98
99
100
101
102
103
»