Not passing all test cases

#1

Problem;-https://hack.codingblocks.com/app/practice/1/245/problem
https://ide.codingblocks.com/s/394250

#2

Have debugged your code here, also have added comments for you so that you can know why it wasn’t passing a test case. Now it’s giving 100% result.

#3

Thank you , i forget to declare long long.

#4

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