Input(s) - any string
Output(n) - number of digits within string s
Additional test cases have been added.
How long is the longest prime diagonal?
Getting the indices from a matrice
Add two numbers
Perfect Square or not
Beginner's Problem - Squaring
Number of odd and even elements within matrix
Return area of square
Create matrix with Gray code
Mean and standard deviation of times in string
Vector of numbers divisible by 3
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