ADDREV.cpp

#include <iostream>
using namespace std;
 
int getRevere(int a)
{
    int leng = 0;
    int p[10];
    
    while(a)
    {
        int t = a % 10;
        p[leng++] = t;
        a = a/10;
    }
 
    int x = 0;
    for(int i = 0; i < leng; i++)
        x = x * 10 + p[i]; 
 
    return x;
}
 
int main()
{
    ios::sync_with_stdio(false);
    
    // comment trước khi submit
    freopen("input.txt","r",stdin);
 
    int T = 0;
    cin >> T;
 
    for(int i = 0; i < T; i++)
    {
        int x, y;
        cin >> x >> y;
 
        int a = getRevere(x) + getRevere(y);
        cout << getRevere(a) << endl;
    }
 
    return 0;
}