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Random
Hot problems
CEOI '16 P2 - Kangaroo
DWITE '10 R3 #3 - Dominos Tiling
COCI '08 Contest 3 #6 Najkraci
CCC '24 J3 - Bronze Count
CCC '24 S4 - Painting Roads
COCI '08 Contest 3 #2 Kemija
CCC '23 J3 - Special Event
Problem
Category
Points
AC %
Users ▴
COCI '17 Contest 1 #3 Lozinke Hard
COCI
7
25.3%
57
CCO Preparation Test 3 P3 - Arrow
Mock CCO
30p
17.7%
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
DWITE '08 R4 #1 - Four player Pong with no players
DWITE
7
71.9%
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
17.8%
58
William and Summation
Uncategorized
7p
27.1%
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
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
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
COCI '08 Contest 1 #3 Mravojed
COCI
10
15.1%
59
DWITE '10 R1 #2 - Robot Vacuum Prototype
DWITE
3
38.5%
59
APIO '14 P1 - Palindromes
APIO
25p
18.2%
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
17.4%
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
NOI '05 P4 - CongCong and KoKo
China NOI
15p
19.9%
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
MCIPC Contest 2 P2 - Icicles
Uncategorized
3
39.1%
59
COCI '22 Contest 4 #5 Vrsta
COCI
12p
35.8%
59
UTS Open '15 #5 - Distribution Channel
Uncategorized
20p
6.0%
60
HCI '16 - Foodie
Uncategorized
7p
31.7%
60
Mock CCO '17 Problem 1 - Fast Fuhrer Transform
Mock CCO
10p
25.4%
60
DMOPC '18 Contest 6 P5 - Quadrat Sampling
DMOPC
20p
15.2%
60
APIO '07 P3 - Zoo
APIO
20p
32.3%
60
OCC '19 S1 - Floor Planning
Uncategorized
3p
32.6%
60
CCO '20 P5 - Interval Collection
CCO
25p
16.0%
60
NOI '12 P1 - Random Number Generator
China NOI
15p
24.8%
60
Skyscrapers
Uncategorized
15p
18.3%
60
IOI '13 P3 - Wombats (Standard I/O)
IOI
40p
9.5%
60
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