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.
First N Perfect Squares
Triangle Numbers Below N
find radius of cone
Sum of Two Numbers
Four digit number ABCD reversal
Number of o rderd pairs of integers (I,J) that can be formed.
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