Prasad, I enjoyed thinking through the pattern to solve this problem and the related problem. One suggestion for both is to add more test cases so that solvers cannot simply write their codes to return the answer to the single test case.
Needs more test cases.
Which doors are open?
How to find the position of an element in a vector without using the find function
Sum of diagonal of a square matrix
Make a random, non-repeating vector.
Area of an Isoceles Triangle
Four digit number ABCD reversal
Number of o rderd pairs of integers (I,J) that can be formed.
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