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Random
Hot problems
CCC '24 S2 - Heavy-Light Composition
Max's Anger Contest Series 2 P2 - Password Anger
Max's Anger Contest Series 2 P3 - Array Anger
CCC '12 S2 - Aromatic Numbers
The Cosmic Era P2 - Uneven Sand
CCC '20 J4 - Cyclic Shifts
Cheerio Contest 1 S2 - School Expansion
Problem
Category
Points
AC %
Users ▾
Literature Club
Uncategorized
5p
48.2%
45
DMPG '18 S3 - Black and White IV
DMOPC
7p
12.7%
45
Baltic OI '18 P5 - Genetics
Baltic OI
25p
14.5%
45
Inaho IX
Uncategorized
20p
27.8%
45
COCI '17 Contest 2 #4 San
COCI
12p
16.4%
45
DMOPC '19 Contest 1 P3 - Simple Math
DMOPC
12
18.2%
45
Grid 1.5
Uncategorized
10p
9.9%
45
ACM U of T Tryouts C3 D - A Frightening Evening
ICPC
5
21.1%
45
NOI '09 P3 - Modified Treap
China NOI
20p
28.2%
45
WC '17 Contest 4 S2 - Strange Travels
Woburn Challenge
12p
40.2%
45
DMOJ Capture The Flag '20 G3 - Git Gud
CTF
5
24.2%
45
Traffic Lights
Uncategorized
10p
62.5%
45
Monkey Country
Uncategorized
10
20.7%
45
COCI '13 Contest 6 #1 Vjeko
COCI
3p
22.0%
45
CPC '21 Contest 1 P5 - AQT and Modern Art
Uncategorized
15p
15.8%
45
Another Random Contest 1 P5 - A Strange Country
Uncategorized
15p
14.9%
45
Baltic OI '14 P2 - Three Friends
Baltic OI
7p
19.3%
45
DMPG '16 B6 - Counting Money
DMOPC
7p
15.3%
44
Back To School '16: Contest Practice
Seasonal
20p
42.0%
44
TLE '16 Contest 1 P5 - Battle Plan
TLE
17p
21.6%
44
ICPC ECNA 2005 E - Reliable Nets
ICPC
15
21.5%
44
COCI '06 Contest 6 #4 Kamen
COCI
15p
13.2%
44
COI '07 #4 Umnožak
COCI
25p
11.9%
44
COCI '08 Contest 3 #3 Cross
COCI
10
33.7%
44
DWITE '12 R1 #2 - Candybar Graphs
DWITE
5
59.6%
44
DWITE '11 R3 #1 - Weighted Presents
DWITE
3
56.0%
44
Mock CCO '18 Contest 2 Problem 1 - Victor Runs
Mock CCO
15p
16.5%
44
NOI '15 P2 - Software Package Manager
China NOI
20p
28.0%
44
APIO '18 P3 - Duathlon
APIO
30
28.4%
44
Another Contest 1 Problem 1 - Binary String Operations
ACC
25
12.1%
44
APIO '11 P2 - Find the Path
APIO
20p
25.3%
44
Another Contest 4 Problem 7 - A Sack of Creatures
ACC
0
39.6%
44
COCI '06 Contest 5 #4 Liga
COCI
12p
12.4%
44
WC '16 Contest 4 J2 - You're Dead!
Woburn Challenge
7p
31.5%
44
WC '17 Finals J2 - Redundant Formations
Woburn Challenge
7p
23.2%
44
WC '99 P1 - The Matrix
Woburn Challenge
7
33.9%
44
WC '02 P8 - Deploying Troops
Woburn Challenge
7
18.0%
44
Wesley's Anger Contest 5 Problem 4 - Prison Escape
WAC
17p
17.2%
44
Non-space-separated
Uncategorized
10
30.4%
44
An Animal Contest 4 P5 - Neighbourly Neighbourhoods
AAC
12p
10.9%
44
Yet Another Contest 2 P5 - Mirror Maze
YAC
17p
30.1%
44
IOI '22 P1 - Catfish Farm
IOI
25p
8.1%
44
NOIP '04 P2 - Combine Fruit
China NOI
5
31.9%
44
ETSR '23 Online Round 2 Problem 3 - Stone Game
Uncategorized
15p
5.1%
44
UACC 1 P6 - Labyrinth Treasure
Uncategorized
12p
31.0%
44
GCC '16 P3 - Hang Gliding Fun
Uncategorized
25p
12.5%
43
MNYC '17: Removing Christmas Trees
Seasonal
15p
21.6%
43
RGPC '17 P3 - Intercept
Uncategorized
7
19.8%
43
DWITE '09 R4 #2 - Verifying Distributed Work
DWITE
3
31.1%
43
Valentine's Day '18 S4 - Coastal California Cities
Mock CCC
7p
45.6%
43
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