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Random
Hot problems
CCC '24 S2 - Heavy-Light Composition
APIO '09 P3 - The Great ATM Robbery
COCI '11 Contest 5 #2 Eko
String Finding
ICPC PACNW 2016 A - Alphabet
Appleby Contest '19 P5 - Matrix Operation
CCO '07 P2 - Snowflakes
Problem
Category
Points
AC %
Users ▾
Path Finder 2: Electric Boogaloo
Uncategorized
15p
23.0%
26
DMOPC '20 Contest 2 P6 - Unfair Game
DMOPC
25p
16.0%
26
CPC '21 Contest 1 P6 - AQT's Break Time is Over
Uncategorized
20p
7.2%
26
Division Queries and Updates
Uncategorized
20p
22.6%
26
COCI '11 Contest 3 #1 Digitalna
COCI
3p
44.1%
26
COCI '10 Contest 5 #2 Košarka
COCI
5p
56.0%
26
COCI '11 Contest 3 #5 Plaće
COCI
12p
27.7%
26
COCI '13 Contest 5 #5 Trokuti
COCI
15p
23.3%
26
Baltic OI '10 P4 - Matching Bins
Baltic OI
7p
20.8%
26
Baltic OI '11 P1 - Growing Trees
Baltic OI
20p
23.2%
26
COCI '21 Contest 5 #2 Dijamant
COCI
10p
26.8%
26
Waterloo 2022 Fall A - Zero AAMP Currents
Waterloo Local
10
62.5%
26
ETSR '23 Onsite Round 2 Problem 1 - Bracket
Uncategorized
12p
8.4%
26
Waterloo 2023 Fall D - Reptilian Communism
Waterloo Local
7
25.4%
26
WOSS Dual Olympiad 2023 Team Round P2: Holding Eggnog
Uncategorized
7
35.3%
26
TSOC '15 Contest 1 #2 - Special Store
TSOC
7p
10.4%
25
DMPG '17 G1 - FatalWhale and Candies
DMOPC
15p
13.1%
25
Mock CCO '17 Problem 6 - Dire Consequences
Mock CCO
20
24.2%
25
COCI '08 Contest 2 #6 Cavli
COCI
25p
14.1%
25
COCI '15 Contest 5 #2 Multigram
COCI
5
39.8%
25
CCO '99 P4 - Maple Roundup
CCO
10
22.2%
25
IOI '19 P3 - Rectangles
IOI
30p
6.9%
25
CEOI '19 Practice P3 - Tower Defense
CEOI
12p
13.9%
25
VPEX P3 - Coding Club
Uncategorized
12p
4.7%
25
QCC P5 - Vaccine Delivery
Uncategorized
12
16.2%
25
CCO '20 P3 - Mountains and Valleys
CCO
35p
5.8%
25
NOI '07 P4 - Necklace Factory
China NOI
20p
10.1%
25
NOI '10 P4 - Flight Control
China NOI
20p
21.7%
25
MMM '14 B - Benergy Transfer
Uncategorized
10
40.5%
25
COCI '10 Contest 1 #4 Ljutnja
COCI
12p
8.0%
25
WC '15 Finals S4 - Server Hacking
Woburn Challenge
20p
26.8%
25
WC '99 Suicidal P1 - World
Woburn Challenge
17p
16.6%
25
WC '15 Contest 3 J3 - Red Sun Simulator
Woburn Challenge
10p
9.6%
25
WC '16 Contest 4 S1 - Parking Duty
Woburn Challenge
10p
19.3%
25
DMOJ Capture The Flag '20 R1 - Classic Java
CTF
5
69.2%
25
DMOJ Capture The Flag '20 B3 - Classic Buffer Overflow
CTF
7
10.7%
25
Baltic OI '16 P4 - Cities
Baltic OI
15p
32.1%
25
IOI '16 P2 - Roller Coaster Railroad (Standard I/O)
IOI
35p
12.5%
25
COCI '11 Contest 2 #4 KompičI
COCI
7p
15.6%
25
COCI '11 Contest 3 #4 Robot
COCI
7
39.7%
25
COCI '11 Contest 4 #4 Ograda
COCI
10p
24.5%
25
COCI '13 Contest 4 #4 Guma
COCI
12p
32.6%
25
COCI '17 Contest 7 #2 Timovi
COCI
7p
40.8%
25
COCI '11 Contest 5 #6 Popločavanje
COCI
25p
23.0%
25
BSSPC '21 S4 - Child Prodigy Chadstin
Uncategorized
17p
6.7%
25
Special Relativity
Uncategorized
10p
8.0%
25
NOI '21 P1 - Light Heavy Edges
China NOI
25p
8.7%
25
April Fools' Day Contest 1 P8 - NP-Hard
Uncategorized
0
5.7%
25
DMOPC '21 Contest 9 P5 - Chika Circle
DMOPC
20p
11.7%
25
BPC 1 S3 - Bus Stops
Uncategorized
17p
12.9%
25
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