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/*
****************************************************************
****************************************************************
-> Coded by Stavros Chryselis
-> Visit my github for more solved problems over multiple sites
-> https://github.com/StavrosChryselis
-> Feel free to email me at [email protected]
****************************************************************
****************************************************************
*/
#include <stdio.h>
#include <string>
#include <algorithm>
#include <iostream>
using namespace std;
int main()
{
string A, B;
string sum;
int T;
//freopen("input.txt","r",stdin);
scanf("%d", &T);
while(T--)
{
cin>>A>>B;
reverse(A.begin(), A.end());
reverse(B.begin(), B.end());
sum=to_string(stoi(A, nullptr, 10) + stoi(B, nullptr, 10));
reverse(sum.begin(), sum.end());
printf("%d\n", stoi(sum, nullptr, 10));
}
return 0;
}
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