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
...
95
96
97
98
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 '19 S2 - Pretty Average Primes
COCI '14 Contest 6 #4 Kratki
ACSL '09 Practice P4 - Rank
IOI '06 P2 - Pyramid
Knapsack 4
UACC 1 P3 - Cheeky Checkers
DMOPC '14 Contest 4 P3 - Golden Lily
Problem
Category
Points ▾
AC %
Users
SAC '22 Code Challenge 4 P1 - Obligatory Car Problem
SAC Coding Challenge
3
36.0%
210
Olympic Scoring
Uncategorized
3
13.5%
127
Another Contest 8 Problem 1 - Trash Push
ACC
3
47.1%
332
Another Contest 8 Problem 2 - Unnecessary Trash Push
ACC
3
47.0%
267
UCRPC F21 B - Lost in the Shuffle
ICPC
3
68.7%
87
Spring Coding Bowl '22 P1 - Student Numbers
Uncategorized
3
18.9%
77
SAC '22 Code Challenge 5 P1 - Querying Plants
SAC Coding Challenge
3
65.6%
227
MALD Contest 1 P1 - Scratch Cat and DDoS
Uncategorized
3
24.3%
144
WOSS Dual Olympiad 2021 J1: Water Classification
Seasonal
3
49.7%
273
WOSS Dual Olympiad 2021 J2/S1: Secret Formula
Seasonal
3
64.1%
263
GFSS Christmas Challenge P1 - Arithmetic Operators
GFSSOC
3
70.8%
168
GFSS Christmas Challenge P2 - Height Inspection
GFSSOC
3
60.1%
73
Divide and Mod
Uncategorized
3
29.8%
69
SAC '22 Code Challenge 3 Junior P1 - Normal Problem
SAC Coding Challenge
3p
66.3%
331
SAC '22 Code Challenge 3 Junior P2 - Normal Lines
SAC Coding Challenge
3p
67.4%
283
SAC '22 Code Challenge 3 Junior P3 - Normal Probabilities
SAC Coding Challenge
3p
68.7%
251
Mock CCC '22 Contest 1 J1 - Square Root Decomposition
Mock CCC
3
40.9%
657
Mock CCC '22 Contest 1 J2 - Biking and Hiking
Mock CCC
3
34.9%
539
An Animal Contest 5 P1 - Bamboo Cookies
AAC
3p
47.1%
587
Mock CCC '22 Contest 2 J1 - Opening Ceremony
Mock CCC
3
48.2%
702
Mock CCC '22 Contest 2 J2 - Snowboarding Championship
Mock CCC
3
35.7%
565
CCC '22 J1 - Cupcake Party
CCC
3
55.4%
2910
CCC '22 J2 - Fergusonball Ratings
CCC
3
47.7%
2657
Mock CCC '24 Contest 1 J2 - Simple Elo Rating System
Mock CCC
3
34.9%
223
SAC '22 Code Challenge 4 Junior P1 - Obligatory DeMello Problem
SAC Coding Challenge
3
62.9%
255
SAC '22 Code Challenge 4 Junior P2 - Obligatory Geometry Problem
SAC Coding Challenge
3p
51.6%
209
BPC 1 J1 - Facial Recognition
Uncategorized
3
58.9%
430
Another Contest 9 Problem 1 - Black Room Boy
ACC
3
53.1%
165
SAC '22 Code Challenge 5 Junior P1 - Monkey, Type!
SAC Coding Challenge
3
68.3%
252
Cheerio Contest 1 J1 - Pronounceable Words
Uncategorized
3
38.3%
198
SAC '22 Code Challenge 5 Junior P2 - Badminton Scoring
SAC Coding Challenge
3
72.8%
289
Max's Anger Contest Series 1 P1 - Hunger Bar
Seasonal
3p
59.7%
299
Cheerio Contest 1 J2 - Phys Ed Class
Uncategorized
3
39.5%
135
Pie
Uncategorized
3
61.5%
168
BPC 1 J2 - Cake
Uncategorized
3
34.7%
207
An Animal Contest 7 P1 - Squirrnect 4
AAC
3
21.7%
452
NOIP '18 Junior P1 - Title Statistics
China NOI
3p
66.7%
52
MCIPC Contest 1 P1 - Factoring
Uncategorized
3
25.7%
79
MCIPC Contest 1 P2 - Infinite Chessboard
Uncategorized
3
49.1%
74
BSSPC '22 P2 - Rhyming Numbers
Uncategorized
3
45.1%
403
BSSPC '22 P1 - Bubble Tea Tracker
Uncategorized
3
68.4%
540
Cheerio Contest 2 P1 - Cow Pasture
Uncategorized
3p
36.1%
41
Cheerio Contest 2 P2 - Cereal Boxes
Uncategorized
3
13.0%
25
MCIPC Contest 2 P2 - Icicles
Uncategorized
3
38.8%
58
MCIPC Contest 2 P1 - Super Mega Snowball
Uncategorized
3
37.0%
43
WOSS Dual Olympiad 2022 J1: Holiday Gifting
Seasonal
3
56.7%
245
WOSS Dual Olympiad 2022 J2: Counting Christmas Trees
Seasonal
3
37.8%
200
WOSS Dual Olympiad 2022 Team Round P1: Bobby and His Calculus Test
Seasonal
3p
60.0%
74
NOIP '07 P1 - Counting Numbers
China NOI
3p
51.5%
47
Mock CCC '23 Contest 1 J1 - Final Velocity
Mock CCC
3
66.3%
739
«
1
2
...
95
96
97
98
99
100
»