Distance walked 1D
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Find out total non zero element of matrix
Append two matrix as shown below example
Square a Number
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Find the area of the four walls
Convert a number to its Roman representation
Find the square of the sum of the digits of a number
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