Resolve failed test cases

#1

For my code, test case 0 is giving wrong answer and test case 3 is giving run-error, kindly resolve.
Link to my code is - https://ide.codingblocks.com/s/192560

#2

Hey instead of directly taking (sum+n)%n
first take simple mod, then add n and take mod
sum=sum%n
sum=(sum+n)%n

#3

@7nishit we need to take mod like this to prevent negative number.
eg affer adding a number sum becomes -150 n=51
now (sum+n)%51=-48 (negative)
but using modified way
sum%n=-48
(sum+n)%n=3(positive)
If this solves your doubt mark it as resolved.

#4

Thanks , it resolved my doubt. All test cases passed.