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
SAC '22 Code Challenge 5 P2 - Querying Extensions
CCC '24 S2 - Heavy-Light Composition
IOI '10 P3 - Quality of Living
Fibonacci Sequence
CCC '02 S4 - Bridge Crossing
Segment Tree Practice 1
IOI '94 P1 - The Triangle
Problem
Category
Points
AC % ▴
Users
ACM U of T Tryouts C0 A - Max Flow
ICPC
3
60.4%
984
Google Code Jam '22 Qualification Round Problem B - 3D Printing
Google Code Jam
5p
60.5%
15
CCC '17 J1 - Quadrant Selection
CCC
3
60.6%
5584
DMOJ Capture The Flag '20 C1 - All the bases!
CTF
3
60.8%
106
ECOO '13 R2 P4 - Breaking Rocks
ECOO
10p
60.9%
11
GFSS Christmas Challenge P2 - Height Inspection
GFSSOC
3
61.0%
76
DMOPC '19 Contest 1 P0 - Range Finding
DMOPC
3
61.0%
362
DWITE '09 R6 #5 - Air Travel Planning
DWITE
7
61.0%
118
DWITE '08 R3 #4 - Time for change
DWITE
7
61.1%
268
COCI '18 Contest 6 #2 Konj
COCI
7p
61.1%
10
CCC '24 J2 - Dusa And The Yobis
CCC
3p
61.2%
477
Mock CCC '18 Contest 3 J1 - A Sum Problem
Mock CCC
3p
61.2%
604
DWITE '09 R3 #5 - Up To Four Colours
DWITE
12
61.3%
37
Firebending
Uncategorized
3
61.3%
352
New Year's '15 P3 - Gift Wrap
Seasonal
5
61.3%
152
COCI '17 Contest 2 #1 Košnja
COCI
3
61.3%
115
Mock CCC '24 Contest 1 J1 - Lemon Bathtub
Mock CCC
3
61.3%
467
COCI '13 Contest 3 #2 Okvir
COCI
5p
61.4%
24
COCI '06 Contest 4 #2 Skener
COCI
3
61.4%
223
Pie
Uncategorized
3
61.5%
168
DWITE '09 R4 #4 - Autocomplete
DWITE
7
61.5%
45
DMOJ Capture The Flag '20 C4 - Larger Encryption
CTF
10
61.5%
8
WC '01 P3 - Back to the Future
Woburn Challenge
5
61.6%
182
COCI '15 Contest 1 #1 Karte
COCI
5
61.6%
107
DWITE '09 R5 #3 - Summary Diff
DWITE
5
61.8%
19
Wesley's Anger Contest 6 Problem 1 - Timbit Sales
WAC
3
61.8%
300
DMOPC '19 Contest 2 P0 - Roller Coaster
DMOPC
3
61.8%
312
COCI '14 Contest 3 #1 Strojopis
COCI
5p
61.9%
165
DWITE '08 R1 #4 - What is this Roman Numeral
DWITE
7
62.0%
155
TSS Club Fair 2017 Problem A
Uncategorized
3p
62.1%
267
DMOPC '19 Contest 5 P1 - Conspicuous Cryptic Checklist
DMOPC
5
62.2%
730
CCC '13 J1 - Next in line
CCC
3
62.3%
12066
COCI '09 Contest 7 #1 Spavanac
COCI
5
62.3%
201
DMOPC '17 Contest 3 P1 - An Early Christmas Present
DMOPC
3p
62.4%
449
TLE '15 P1 - Power Rankings
TLE
5p
62.4%
512
Richmond Green P2 - LOL
Uncategorized
3p
62.5%
228
Waterloo 2017 Fall D - Drama
Waterloo Local
20p
62.5%
3
Bane of Arthropods
Uncategorized
20p
62.5%
2
VPEX P2 - Darcy Parties
Uncategorized
3p
62.5%
321
Traffic Lights
Uncategorized
10p
62.5%
45
Waterloo 2022 Fall A - Zero AAMP Currents
Waterloo Local
10
62.5%
26
Google Code Jam '14 Qualification Round Problem A - Magic Trick
Google Code Jam
5p
62.5%
5
CCO '96 P5 - All Roads Lead Where?
CCO
7
62.6%
271
Hard Question
Uncategorized
5
62.6%
90
UCC Coding Competition '20 P1 - Snowstorm
Uncategorized
3
62.6%
157
COCI '17 Contest 3 #1 Aron
COCI
3
62.6%
103
Another Contest 4 Problem 5 - Prime Time Television
ACC
0
62.7%
158
BlueBook - Multiple
BlueBook
3
62.7%
1443
COCI '20 Contest 4 #1 Pizza
COCI
5p
62.8%
151
SAC '22 Code Challenge 4 Junior P1 - Obligatory DeMello Problem
SAC Coding Challenge
3
62.9%
255
«
1
2
...
95
96
97
98
99
100
»