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Problem
Category
Points
AC % ▾
Users
Days To Break
CBOJ
3
77.8%
14
ECOO 2016 R2 P1 - Palindrome Panic
ECOO
12
73.3%
4
WAC - Triangle: The Root of All Evil
WAC
15p
71.4%
3
CBOJ 2023 Welcome Contest Problem 2 - Algebra Homework
CBOJ
3
71.4%
10
ECOO 2015 R1 P4 - Neanderthal Numbers
ECOO
12
68.2%
7
CBOJ 2022 Welcome Contest Problem 3 - Suspicious Cells
Club
5
68.2%
11
CCC '20 S3 Easy - Searching for Strings
CCC
12p
64.0%
12
Placing Kings
Club
10p
61.9%
12
Menorah
CBOJ
5
57.9%
11
A Plus B
CBOJ
5p
55.0%
48
WAC - Snow Day Predictor
WAC
3
53.2%
21
CCC '21 S3 - Lunch Concert
CCC
10p
52.6%
9
CBOJ 2023 Welcome Contest Problem 1 - Soccer League
CBOJ
3
52.4%
11
Fibonacci 1
Club
5
50.9%
27
CBOJ Winter Contest Problem 1 - Cyclic Isomers
CBOJ
7p
47.7%
19
CBOJ 2022 Welcome Contest Problem 1 - Kernel Bye Computer Science Lovers
Club
3
46.7%
18
Graph Theory: Intro
Club
5
46.3%
20
CCC '21 S1 - Crazy Fencing
CCC
5
45.8%
25
CCC '15 J5 - π-day
CCC
15p
44.2%
18
CBOJ 2023 Welcome Contest Problem 3 - Finding "Amis"
CBOJ
5
44.0%
10
CBOJ 2022 Spring Contest Problem 5 - Draw me a Mountain Range
CBOJ
17p
43.8%
3
Zeyu and Addition
CBOJ
5
42.9%
13
Mountain, Valley And Repeat
CBOJ
17
42.3%
2
CBOJ Welcome Contest Problem 2 - Eating Candies
CBOJ
5p
41.9%
27
CCC '21 S5 - Math Homework
CCC
12p
41.7%
7
CCC '19 J5 - Rule of Three
CCC
15p
40.0%
8
Palindrome 1 - Check Palindrome
CBOJ
3
39.3%
31
Public Service Announcement
Club
7p
38.1%
17
CBOJ Exec Selection Contest 2 Problem 1 - Vowels
Club
3
37.2%
12
A Difference Array Problem
Club
7p
37.0%
9
Graph Theory: Shortest Path
Club
10
36.9%
19
ECOO 2018 R2 P3 - Factorial
ECOO
12
36.8%
5
CBOJ 2022 Spring Contest Problem 1 - KMP
CBOJ
3
35.7%
18
CCC '03 S5 - Trucking Troubles
CCC
15p
35.0%
7
Graph Theory: Connectivity
Club
10
34.5%
20
A CCC Preparation Problem
CBOJ
1
32.9%
19
CCC '21 S2 - Modern Art
CCC
7p
31.7%
13
CBOJ Fall Contest Problem 1 - Rule of Four
CBOJ
7p
31.1%
17
Allen's Graph
Club
7
30.8%
11
The Perfect Gift
CBOJ
7p
30.6%
5
A Math Problem (Easy)
Club
7
30.2%
18
CBOJ Welcome Contest Problem 1 - Symmetric Encryption
CBOJ
5p
30.0%
24
CBOJ 2022 Spring Contest Problem 3 - Martin's Monochromatic Marbles
CBOJ
7p
29.8%
6
CBOJ Fall Contest Problem 4 - Taking an L
CBOJ
12p
29.3%
7
CBOJ 2022 Welcome Contest Problem 2 - First Day of School
Club
5
28.9%
10
Making a Necklace
Club
10p
28.6%
7
Fibonacci 2
Club
7
28.5%
18
Zeyu and Prefixes
CBOJ
5
28.4%
12
CBOJ Fall Contest Problem 2 - Raking Leaves
CBOJ
7p
27.5%
20
CBOJ Exec Selection Contest Problem 1 - Networking
CBOJ
12p
27.1%
12
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