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Random
Hot problems
Max's Anger Contest Series 2 P3 - Array Anger
Max's Anger Contest Series 2 P2 - Password Anger
SAC '22 Code Challenge 5 P2 - Querying Extensions
IOI '94 P1 - The Triangle
Cheerio Contest 1 S2 - School Expansion
CCC '24 S2 - Heavy-Light Composition
ICPC PACNW 2016 A - Alphabet
Problem
Category
Points
AC %
Users ▾
Mine and Tree
Seasonal
30p
22.7%
59
COCI '14 Contest 7 #2 Kriza
COCI
7p
18.2%
59
VM7WC '16 #6 Silver - Diana Socializes
VM7WC
7
17.1%
59
MWC '15 #2 P3: Breaking Ice
MWC
5
34.3%
59
MWC '15 #6 P2: Breadwinners
MWC
7p
27.1%
59
IOI '15 P6 - Towns
IOI
40p
15.5%
59
HCI '16 - Foodie
Uncategorized
7p
31.7%
59
New Year's '17 P2 - Peter's Escape
Seasonal
10p
12.7%
59
COCI '07 Contest 2 #5 Kemija
COCI
15p
21.8%
59
COCI '07 Regional #4 Jednakost
COCI
12p
13.9%
59
APIO '14 P1 - Palindromes
APIO
25p
18.3%
59
Mock CCC '18 Contest 3 J5/S3 - A Cookie-Cutter Problem
Mock CCC
10p
10.0%
59
CCO '18 P6 - Flop Sorting
CCO
30p
17.5%
59
COCI '19 Contest 4 #5 Nivelle
COCI
12p
44.4%
59
NOI '97 P2 - Optimal Routing
China NOI
7p
28.5%
59
NOI '00 P1 - Ceramic Necklace
China NOI
5
32.1%
59
King Graff's Defense
Uncategorized
15p
8.5%
59
A Digit Problem
Uncategorized
12p
31.8%
59
COCI '16 Contest 3 #2 Pohlepko
COCI
7p
22.2%
59
Carnival Game
Uncategorized
7
28.3%
59
COCI '22 Contest 4 #5 Vrsta
COCI
12p
35.8%
59
Max's Anger Contest Series 2 P5 - Job Anger
Seasonal
12p
27.7%
59
CCO Preparation Test 3 P3 - Arrow
Mock CCO
30p
17.8%
58
DMPG '15 G5 - ExpedColle
DMOPC
15p
10.6%
58
IOI '98 P1 - Contact
IOI
10p
8.9%
58
ECOO '17 R1 P4 - Almost Sorted
ECOO
7p
9.0%
58
COCI '08 Contest 1 #3 Mravojed
COCI
10
15.1%
58
DWITE '08 R4 #1 - Four player Pong with no players
DWITE
7
71.9%
58
DWITE '10 R1 #2 - Robot Vacuum Prototype
DWITE
3
38.1%
58
TLE '17 Contest 8 P1 - Artificial Intelligence
TLE
7p
9.1%
58
Another Contest 1 Problem 3 - Poutine
ACC
10
4.1%
58
CCO '00 P4 - Packet Routing
CCO
7
59.8%
58
COCI '19 Contest 3 #1 Preokret
COCI
5p
18.0%
58
COCI '10 Contest 3 #1 Tablica
COCI
3p
47.1%
58
William and Summation
Uncategorized
7p
27.1%
58
GFSS Christmas Challenge P4 - Coal Counting
GFSSOC
7p
26.7%
58
COCI '21 Contest 6 #1 Med
COCI
5p
40.1%
58
A Math Contest P11 - Weak Goldbach's Conjecture
Uncategorized
15
23.9%
58
DMOPC '22 Contest 3 P3 - Ina's Takodachis
DMOPC
15p
5.7%
58
EGOI '22 P1 - SubsetMex
EGOI
10p
36.8%
58
Max's Anger Contest Series 1 P5 - Slacking Subsequences
Seasonal
15p
30.9%
58
MCIPC Contest 2 P2 - Icicles
Uncategorized
3
38.8%
58
Find Dates
Uncategorized
7
8.5%
57
DMPG '16 G4 - Araxxi
DMOPC
15p
20.8%
57
ECOO '17 R2 P2 - Treasure Hunt
ECOO
10p
41.7%
57
RTE '16 J3 - Mule Wars
Uncategorized
5p
36.0%
57
IOI '17 P4 - The Big Prize
IOI
20p
10.5%
57
DWITE '09 R4 #3 - Moving at the same time
DWITE
5
31.2%
57
DMOPC '18 Contest 5 P5 - A Hat Problem
DMOPC
20p
22.3%
57
IOI '18 P3 - Werewolf
IOI
30p
24.1%
57
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