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Hot problems
WC '95 P4 - Wildcard
Pick It
Max's Anger Contest Series 2 P3 - Array Anger
Cheerio Contest 1 S2 - School Expansion
SAC '22 Code Challenge 5 P2 - Querying Extensions
Appleby Contest '19 P5 - Matrix Operation
Max's Anger Contest Series 2 P2 - Password Anger
Problem
Category
Points ▾
AC %
Users
Waterloo 2013 Fall A - Compressed Words?
Waterloo Local
5
44.4%
6
Waterloo 2003 Spring B - Persistent Numbers
Waterloo Local
5
57.1%
4
Waterloo 2001 Fall 1 C - Babelfish
Waterloo Local
5
28.9%
12
Waterloo 2005 Winter E - Traditional BINGO
Waterloo Local
5
66.7%
4
UACC 1 P2 - Puzzling Parks
Uncategorized
5
27.8%
207
DMOPC '22 Contest 5 P1 - Triple Triplets
DMOPC
5p
23.7%
227
Geography Class
Uncategorized
5p
14.1%
67
Singularity Cup P1 - Maximum Permutation Product
Uncategorized
5p
15.7%
285
COCI '23 Contest 1 #1 Sudoku
COCI
5p
47.9%
64
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles
Mock CCC
5p
11.6%
255
Amplitude Hackathon '23 Problem 3 - Dedupe
Uncategorized
5p
53.3%
38
DMOPC '23 Contest 1 P1 - Peak Grid
DMOPC
5p
54.8%
364
WOSS Dual Olympiad 2023 Team Round P1: Combining Candy Canes
Uncategorized
5
32.0%
47
X Diagonal
Uncategorized
5p
34.0%
8
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude!
Uncategorized
5p
14.3%
19
Amplitude Hackathon '23 Practice Problem 3 - Demo Day Demos
Uncategorized
5p
31.2%
24
COCI '23 Contest 2 #1 Pahuljice
COCI
5p
43.2%
60
WOSS Dual Olympiad 2023 J2: 3 Numbers
Uncategorized
5
33.4%
125
HHPC1 P1 - Yielding the Longest Substring
Uncategorized
5
22.9%
213
OTHS Coding Competition 1 (Mock CCC) J3 - Explosion
Uncategorized
5p
35.7%
248
Mock CCC '24 Contest 1 J3 - RGB Words
Mock CCC
5p
13.3%
187
UHCC1 P3 - Busy Elevator
Uncategorized
5
10.3%
55
UHCC1 P2 - String
Uncategorized
5
46.2%
106
The Contest Contest 1 P1 - A Typical Codeforces Problem
Uncategorized
5
23.6%
314
COCI '23 Contest 3 #1 Eurokod
COCI
5p
60.0%
39
COCI '23 Contest 4 #1 Bingo
COCI
5p
67.0%
65
CCC '24 S2 - Heavy-Light Composition
CCC
5p
54.6%
439
CCC '24 J3 - Bronze Count
CCC
5p
47.2%
475
CCC '24 J4 - Troublesome Keys
CCC
5p
22.0%
303
Guessing Game
Uncategorized
5p
37.8%
9
COCI '23 Contest 5 #1 Zlagalica
COCI
5p
53.2%
28
Capture The Flag
Uncategorized
5
29.7%
71
A Plus B
Uncategorized
3p
48.7%
8036
Hello, World!
Uncategorized
3
56.1%
12227
CCC '14 J1 - Triangle Times
CCC
3
32.9%
7480
CCC '14 J2 - Vote Count
CCC
3
44.5%
5371
CCC '14 J3 - Double Dice
CCC
3
56.3%
4487
List Minimum
Uncategorized
3
49.8%
3285
CCC '09 J1 - ISBN
CCC
3
47.3%
3691
CCC '13 J1 - Next in line
CCC
3
62.3%
12072
CCC '13 J2 - Rotating letters
CCC
3
45.0%
4837
CCC '12 J1 - Speed fines are not fine!
CCC
3
30.8%
5786
CCC '12 J2 - Sounds fishy!
CCC
3
33.8%
4588
CCC '12 J3 - Icon Scaling
CCC
3
51.3%
2881
CCC '12 J4 - Big Bang Secrets
CCC
3
59.3%
2404
Boolean
Uncategorized
3
50.4%
2352
Infinity
Uncategorized
3
35.6%
547
Unique Elements
Classics
3p
51.4%
1384
Pulse
Uncategorized
3
38.3%
378
Guess the Sequence
Uncategorized
3p
5.9%
187
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