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Hot problems
CCC '19 S2 - Pretty Average Primes
ACSL '09 Practice P4 - Rank
IOI '06 P2 - Pyramid
Knapsack 4
UACC 1 P3 - Cheeky Checkers
IOI '94 P1 - The Triangle
COCI '12 Contest 3 #3 Malcolm
Problem
Category
Points ▴
AC %
Users
WC '18 Finals S5 - Opening Weekend
Woburn Challenge
25p
12.4%
6
WC '18 Contest 2 S4 - Car Convergence Chaos
Woburn Challenge
25p
1.6%
2
WC '16 Finals S5 - Bovine Grenadiers
Woburn Challenge
25p
10.3%
6
WC '17 Finals S5 - Crop Rectangles
Woburn Challenge
25p
1.7%
2
WC '17 Contest 4 S4 - Alpha Nerd (Hard)
Woburn Challenge
25p
33.3%
1
WC '18 Contest 4 S4 - Super Luigi Odyssey
Woburn Challenge
25p
9.2%
4
CCCHK '15 S5 - Can I pass the courses?
CCC
25p
5.4%
6
Checkerboard Cut
Uncategorized
25p
30.1%
5
DMOPC '20 Contest 1 P6 - Victor Identifies Software
DMOPC
25p
16.1%
32
Wesley's Anger Contest 5 Problem 5 - A Squirrel's Life
WAC
25p
7.6%
12
Baltic OI '17 P1 - Political Development
Baltic OI
25p
23.2%
29
Baltic OI '16 P5 - Maze
Baltic OI
25p
2.6%
6
Baltic OI '20 P3 - Joker
Baltic OI
25p
14.9%
16
Secret Room
Uncategorized
25p
8.4%
26
Dominoes
Uncategorized
25
9.1%
49
Facebook Hacker Cup '14 Final Round P4 - Tours
Uncategorized
25
21.1%
21
Anti-Fire Fox
Uncategorized
25p
6.7%
2
IOI '08 P2 - Islands
IOI
25p
10.4%
111
COCI '09 Contest 6 #5 Holmes
COCI
25p
28.4%
20
IOI '07 P3 - Sails
IOI
25p
21.5%
210
Guitar Hero
Uncategorized
25p
1.6%
1
IOI '07 P5 - Pairs
IOI
25p
10.0%
116
IOI '12 P4 - Ideal City (Standard I/O)
IOI
25p
42.9%
5
COCI '09 Contest 6 #6 Gremlini
COCI
25p
12.9%
17
IOI '07 P2 - Flood
IOI
25p
45.0%
135
Balkan OI '11 P4 - Compare
Balkan OI
25p
28.8%
17
IOI '11 P1 - Tropical Garden (Standard I/O)
IOI
25p
11.8%
166
IOI '12 P2 - Parachute Rings (Standard I/O)
IOI
25p
11.5%
111
UTS Open '21 P6 - Terra Mater
Uncategorized
25p
6.3%
15
IOI '15 P5 - Sorting (Standard I/O)
IOI
25p
18.6%
186
IOI '20 P4 - Packing Biscuits
IOI
25p
12.7%
14
DMOPC '20 Contest 2 P5 - Majority Subarrays
DMOPC
25p
6.6%
21
DMOPC '20 Contest 2 P6 - Unfair Game
DMOPC
25p
16.0%
26
ICPC NWERC 2005 A - Unequalled Consumption
ICPC
25
0.0%
0
Wesley's Anger Contest 6 Problem 7 - SantaTracker++
WAC
25p
16.1%
7
COCI '20 Contest 2 #5 Svjetlo
COCI
25p
54.5%
11
Wesley's Anger Contest Reject 3 - Christmas Carols
WAC
25p
14.4%
13
COCI '20 Contest 3 #5 Specijacija
COCI
25p
28.3%
6
DMOPC '20 Contest 3 P5 - Tower of Power
DMOPC
25p
6.6%
67
Mock CCC '21 S5 - Clique and Independent Set
Mock CCC
25p
18.3%
11
Riolku's Mock CCC S5 - Keen Keener Multiset
Mock CCC
25p
6.6%
13
COCI '16 Contest 3 #6 Meksikanac
COCI
25p
50.0%
1
COCI '16 Contest 6 #6 Gauss
COCI
25p
0.0%
0
COCI '12 Contest 2 #6 Inspektor
COCI
25p
48.0%
5
COCI '12 Contest 4 #6 Akvarij
COCI
25p
8.7%
2
COCI '17 Contest 6 #6 Vrtić
COCI
25p
4.0%
2
DMOPC '20 Contest 4 P6 - Petty Children
DMOPC
25p
20.8%
24
COCI '20 Contest 4 #3 Hop
COCI
25p
22.1%
13
COCI '11 Contest 5 #6 Popločavanje
COCI
25p
23.0%
25
JOI '20 Spring Camp Day 1 P3 - Sweeping
JOI
25p
18.2%
2
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