HackerEarth Addition ain't simple problem solution

In this HackerEarth Addition ain't simple problem solution Jack is awesome. his friends call him little Einstein. To test him, his friends gave him a string. They told him to add the string with its reverse string and follow these rules:

1. Every ith character of the string will be added to every ith character of the reverse string.
2. Both strings will contain only lower case alphabets(a-z).
3. Eg:- a+a=b,a+c=d,z+a=a (Refer to sample test cases for more details)

HackerEarth Addition ain't simple problem solution.

#include <iostream>
using namespace std;

int main()
{
    int n; cin>>n; 
    while(n--){
        string s; cin>>s; int sum=0;
        for(int i=0;i<s.length();i++){
            sum=s[i]+s[s.length()-i-1]-192;
            if(sum>26) sum-=26;
            printf("%c",sum+96);
        }
        cout<<"\n";
    }
    return 0;
}