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Hot problems
CCC '19 S2 - Pretty Average Primes
IOI '06 P2 - Pyramid
Knapsack 4
UACC 1 P3 - Cheeky Checkers
ACSL '09 Practice P4 - Rank
COCI '12 Contest 3 #3 Malcolm
IOI '00 P1 - Palindrome
Problem
Category
Points
AC % ▾
Users
An Animal Contest 1 P2 - Alpaca Racing
AAC
5p
8.1%
547
IOI '04 P2 - Hermes (Hard)
IOI
20p
8.1%
9
ECOO '18 R3 P3 - Currency Exchange
ECOO
10p
8.1%
13
Mock CCC '18 Contest 1 S5 - A Palindrome Problem
Mock CCC
15p
8.1%
17
IOI '22 P1 - Catfish Farm
IOI
25p
8.1%
44
IOI '21 P5 - Dungeons Game
IOI
30p
8.1%
9
Mock CCC '24 Contest 1 J5 - Mathland
Mock CCC
10p
8.1%
34
DMOPC '22 Contest 3 P6 - Compressibility
DMOPC
25p
8.0%
19
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1450
IOI '19 P5 - Vision Program
IOI
20p
8.0%
32
SGS Programming Challenge P4 - Toy in Psychology Class
Uncategorized
17p
8.0%
14
Special Relativity
Uncategorized
10p
8.0%
25
RGPC '18 P5 - Wormhole
Uncategorized
20p
8.0%
7
Mock CCC '20 S4 - Valentine's Day Shopping
Mock CCC
20p
7.9%
15
Next Prime (Hard)
Classics
15
7.9%
159
LKP '18 Contest 2 P6 - Reconstruction
Uncategorized
25
7.9%
31
Mock CCC '22 2 S3 - Kaguya Wants to Analyze the Academy Anthem
Mock CCC
12p
7.9%
40
Least Multiple
Olympiads School
10p
7.9%
29
CCO '23 P5 - Travelling Trader
CCO
30p
7.9%
17
NOI '08 P2 - Course Design
China NOI
30p
7.9%
12
COCI '10 Contest 1 #4 Ljutnja
COCI
12p
7.9%
24
NOI '13 P6 - Fast Food Restaurant
China NOI
30p
7.9%
11
Yet Another Contest 2 P3 - Maximum Damage
YAC
10p
7.9%
62
An Animal Contest 3 P7 - Monkey Lasers
AAC
25p
7.8%
14
WC '18 Contest 3 S3 - Counterpicking
Woburn Challenge
15p
7.8%
13
Median Modulo
Uncategorized
15p
7.8%
7
TLE '17 Contest 2 P5 - Crew Selection Test
TLE
25p
7.8%
10
DMOPC '22 Contest 5 P4 - Ricochet
DMOPC
17p
7.8%
22
WC '17 Contest 3 S4 - Relevant Results
Woburn Challenge
20p
7.8%
5
DMOPC '22 Contest 1 P6 - Linear Swap
DMOPC
30p
7.8%
9
NOI '16 P1 - Good Partitions
China NOI
20p
7.8%
5
CCO '01 P4 - Breaking Level (Standard I/O)
CCO
12
7.8%
35
CCO '11 P5 - Fixing Disks
CCO
40p
7.7%
6
CCC '03 S4 - Substrings
CCC
15p
7.7%
370
Yet Another Contest 7 P6 - Arithmetic Sequence Data Structure
YAC
25p
7.7%
8
CCC '11 S4 - Blood Distribution
CCC
15p
7.7%
155
CCC '19 S4 - Tourism
CCC
20p
7.7%
248
CCO '00 P2 - Ransom Note
CCO
12p
7.7%
6
Wesley's Anger Contest 5 Problem 6 - Squirrel Cities 2
WAC
30p
7.7%
7
COCI '12 Contest 6 #6 Bakterije
COCI
15
7.7%
3
COI '13 #1 CSS
COCI
20p
7.7%
8
COCI '21 Contest 6 #5 Superozicija
COCI
25p
7.7%
8
Wesley's Anger Contest 1 Problem 7 - Arithmetic Subtrees
WAC
30p
7.7%
8
APIO '15 P2 - Jakarta Skyscrapers
APIO
20p
7.6%
105
SMAC 08/09 (Nov) #2 - Stock Market II
Uncategorized
10p
7.6%
19
NOI '20 P4 - Dish
China NOI
20p
7.6%
19
Wesley's Anger Contest 5 Problem 5 - A Squirrel's Life
WAC
25p
7.6%
12
COCI '07 Contest 5 #6 Baza
COCI
25
7.6%
61
IOI '15 P4 - Horses (Standard I/O)
IOI
15p
7.6%
162
DMPG '19 G1 - Camera Calibration Challenge
DMOPC
12p
7.5%
20
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