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Random
Hot problems
CCC '24 J3 - Bronze Count
CCC '19 S2 - Pretty Average Primes
CCC '00 S1 - Slot Machines
Problem
Category
Points
AC %
Users ▾
Prime Bag
Uncategorized
20p
6.9%
17
COCI '09 Contest 6 #6 Gremlini
COCI
25p
12.9%
17
Balkan OI '11 P4 - Compare
Balkan OI
25p
28.8%
17
ICPC SWERC 2017 D - Candy Chain
ICPC
15
27.8%
17
IOI '20 P1 - Comparing Plants
IOI
40p
6.4%
17
JOI '16 Final P2 - Semiexpress
JOI
12
54.8%
17
Riolku's Mock CCC S2 - Keen Keener Sequence (Hard Version)
Mock CCC
12
10.7%
17
Riddle Troll
Uncategorized
10
27.3%
17
NOI '20 P5 - Surreal
China NOI
17p
10.2%
17
NOI '21 P2 - Intersecting Paths
China NOI
25p
22.9%
17
NOIP '18 P4 - Travel
China NOI
10p
17.7%
17
DMOPC '21 Contest 4 P5 - Graph Generator
DMOPC
20p
16.0%
17
Wesley's Anger Contest 6 Problem 6 (Hard Version) - Santa's Candy Factory
WAC
20p
5.8%
17
COI '19 #4 Zagrade
COCI
15p
21.5%
17
MALD Contest 1 P5 - Scratch Cat and Desktop Backgrounds
Uncategorized
17p
9.9%
17
COI '10 #2 Telka
COCI
12p
37.5%
17
Yet Another Contest 3 P3 - Topography
YAC
15p
2.4%
17
DMOPC '21 Contest 8 P4 - Grid Operations
DMOPC
25p
15.9%
17
Baltic OI '03 P5 - Lamps
Baltic OI
15p
29.9%
17
Another Contest 9 Problem 5 - Satellite
ACC
12
16.7%
17
An Animal Contest 7 P4 - Squirrel Shenanigans
AAC
20
19.2%
17
Purple Lemon
Uncategorized
7p
21.4%
17
MCIPC Contest 1 P5 - Rainwater
Uncategorized
7
23.0%
17
COCI '22 Contest 3 #5 Skrivača
COCI
20p
20.2%
17
Google Code Jam '18 Qualification Round Problem B - Trouble Sort
Google Code Jam
7p
17.8%
17
APIO '23 P2 - Sequence
APIO
25p
7.9%
17
DMOPC '22 Contest 5 P5 - Twos and Threes
DMOPC
25
18.0%
17
CCO '23 P5 - Travelling Trader
CCO
30p
7.9%
17
EGOI '23 P3 - Find the Box
EGOI
17p
16.4%
17
COCI '23 Contest 3 #5 Slučajna Cesta
COCI
15p
36.5%
17
CCO Preparation Test 7 P2 - XOR Path
Mock CCO
20p
13.5%
16
DMPG '16 G2 - Kabane Apocalypse
DMOPC
20p
26.5%
16
IOI '97 P1 - Mars Explorer
IOI
20p
12.8%
16
ICPC ECNA 2005 C - The Game of Efil
ICPC
12
51.4%
16
ECOO '15 R2 P4 - Rectangle Roundup
ECOO
12p
33.3%
16
ECOO '14 R2 P3 - EasySweeper
ECOO
10p
42.3%
16
COCI '08 Contest 3 #4 Matrica
COCI
20p
10.5%
16
IOI '17 P5 - Simurgh
IOI
40p
12.1%
16
DWITE '08 R5 #3 - Working Directory
DWITE
7
45.9%
16
DWITE '10 R1 #4 - Planting Trees
DWITE
7
50.0%
16
DWITE '11 R4 #1 - Crossword Count
DWITE
5
54.8%
16
TLE '17 Contest 6 P4 - Willson and Travelling
TLE
15p
10.7%
16
TLE '17 Contest 6 P6 - 6 Friends
TLE
15p
31.9%
16
IOI '11 P6 - Parrots
IOI
20p
3.6%
16
COCI '17 Contest 2 #5 Usmjeri
COCI
17
21.6%
16
CEOI '17 P3 - Mousetrap
CEOI
25p
14.4%
16
CCO '99 P1 - You Can't Get There From Here
CCO
7
26.5%
16
Mock CCO '19 Contest 1 Problem 6 - A Geometry Problem
Mock CCO
15p
27.2%
16
CCO '02 P3 - Return To Blind Man's Bluff
CCO
12
12.2%
16
Back To School '19: FFT Fun
Seasonal
20p
14.6%
16
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