http://acm.hdu.edu.cn/showproblem.php?pid=1095

 
Problem Description
Your task is to Calculate a + b.

Input
The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.

Output
For each pair of input integers a and b you should output the sum of a and b, and followed by a blank line.

Sample Input

1 5
10 20


Sample Output

6
 
30
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1 #include <iostream>
2 using namespace std;
3 int main()
4 {
5     int a,b;
6     while (cin >> a >> b)
7         cout << a+b << endl << endl;
8     return 0;
9 }