Duplicate all elements in the array
The solution to this problem doesn't make any sense!!!
If you are using the word "duplicate" to mean multiply by 2, then the correct answer is [2,4,6], not [1,4,6]
Back and Forth Rows
Sum of first n terms of a harmonic progression
Find the nearest integer
Delete 2nd and 5th column of Given 6*6 matrix
Sum of series II
Converts numbers into characters
Find the max element of the array
the average value of the elements
to the 2 all elements
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