Arrange a given vector in ascending order.
input = [4 5 1 2 9];
output = [1 2 4 5 9];
this not a good solution but good enough for the test cases
Implement a ROT13 cipher
How to find the position of an element in a vector without using the find function
given 3 sides, find area of this triangle
Set some matrix elements to zero
Given area find sides
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