Your task is to Calculate a + b.

Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.

1 5

10 20

0 0

6

30

#include <iostream>

using namespace std;  

int main()

{

    int i,j;

    while ( cin >> i >> j && (i || j )!=)

        cout << (i + j) << endl;  

    return ;

}