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Random
Hot problems
COCI '08 Contest 4 #6 Periodni
CCC '24 J4 - Troublesome Keys
CCC '24 S2 - Heavy-Light Composition
COCI '23 Contest 5 #4 Rolete
APIO '09 P1 - Digging for Oil
COCI '23 Contest 5 #1 Zlagalica
COCI '22 Contest 4 #1 7Krokods
Problem
Category
Points ▾
AC %
Users
COCI '17 Contest 7 #6 Priglavci
COCI
20p
31.3%
5
COCI '11 Contest 5 #5 Blokovi
COCI
20p
16.0%
3
COCI '12 Contest 5 #6 Mnogomet
COCI
20p
0.0%
0
JOI '20 Spring Camp Day 4 P1 - Capital City
JOI
20
47.1%
13
Canada Day Contest 2021 - 0-1
Seasonal
20p
48.7%
61
DMOPC '20 Contest 5 P5 - Slacking Off Again
DMOPC
20p
17.6%
32
COI '20 #2 Cigle
COCI
20p
16.6%
19
COI '20 #4 MalnaRISC
COCI
20p
2.9%
8
CCO '21 P5 - Bread First Search
CCO
20p
23.0%
62
DMOPC '21 Contest 3 P5 - Crowded Travels
DMOPC
20p
21.2%
18
DMOPC '20 Contest 7 P3 - Senpai and Art
DMOPC
20p
10.7%
28
DMOPC '20 Contest 7 P5 - Mayors and Tolls
DMOPC
20
40.3%
39
Bob's Farm
Uncategorized
20p
31.7%
8
CPC '21 Contest 1 P7 - AQT and Quarantine
Uncategorized
20p
15.5%
15
DMOPC '21 Contest 1 P4 - Uneven Forest
DMOPC
20
27.7%
48
An Animal Contest 4 P6 - Cozy Cottages
AAC
20
16.8%
21
NOI '20 P4 - Dish
China NOI
20p
7.6%
19
DMOPC '21 Contest 3 P4 - Sorting Subsequences
DMOPC
20p
14.2%
32
Mock CCC '22 1 S4 - Berkeley Math Tournament Statistics
Mock CCC
20p
8.7%
31
NOIP '18 P5 - Grid-filling Game
China NOI
20p
15.4%
5
NOIP '21 P2 - Sequence
China NOI
20p
28.6%
59
NOIP '21 P3 - Variance
China NOI
20p
12.0%
35
NOIP '21 P4 - Chess
China NOI
20p
20.8%
7
Baltic OI '09 P5 - Triangulation
Baltic OI
20p
36.5%
9
COCI '21 Contest 2 #3 Hiperkocka
COCI
20p
23.3%
16
COCI '21 Contest 2 #5 Osumnjičeni
COCI
20p
23.8%
47
DMOPC '21 Contest 4 P5 - Graph Generator
DMOPC
20p
16.0%
17
Baltic OI '08 P3 - Magical Stones
Baltic OI
20p
0.0%
0
CCO '05 P3 - That's News To Me
CCO
20
0.0%
0
Yet Another Contest 1 P6 - Alchemy
YAC
20p
15.8%
14
An Animal Contest 6 P5 - Rock Painting
AAC
20p
12.3%
18
Baltic OI '11 P1 - Growing Trees
Baltic OI
20p
23.2%
26
Wesley's Anger Contest 6 Problem 6 (Hard Version) - Santa's Candy Factory
WAC
20p
5.8%
17
COCI '09 Contest 7 #6 Restoran
COCI
20p
16.4%
4
An Animal Contest 6 P4 - Buffet
AAC
20p
7.4%
29
COI '19 #3 Semafor
COCI
20p
16.7%
1
COI '17 #2 Pick
COCI
20p
0.0%
0
Baltic OI '15 P1 - Bowling
Baltic OI
20p
50.0%
3
Yet Another Contest 2 P6 - Travel Budget
YAC
20p
15.0%
37
COCI '21 Contest 5 #5 Usmjeravanje
COCI
20p
19.4%
14
COI '13 #1 CSS
COCI
20p
6.8%
7
Baltic OI '15 P4 - File Paths
Baltic OI
20p
53.3%
4
Baltic OI '15 P6 - Tug of War
Baltic OI
20p
11.1%
4
COI '11 #1 Kampanja
COCI
20p
25.9%
19
COI '12 #1 Hiperprostor
COCI
20p
11.1%
1
COI '13 #4 Nizovi
COCI
20p
9.5%
10
DMOPC '21 Contest 9 P5 - Chika Circle
DMOPC
20p
6.9%
14
DMOPC '21 Contest 9 P4 - Ace of Diamonds
DMOPC
20p
20.1%
39
Yet Another Contest 4 P4 - Even The Odds
YAC
20p
3.8%
11
Yet Another Contest 4 P6 - No More Solitaire
YAC
20p
6.6%
23
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