
A + B Problem
Compute 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. The input will be terminated by EOF.
Output
For each pair of input integers A and B, you must output the sum of A and B in one line.
Constraints
 -1000 ≤ A, B ≤ 1000
Sample Input
1 2
10 5
100 20
Output for the Sample Input
3
15
120
Sample Program
#include<stdio.h>
int main(){
    int a, b;
    while( scanf("%d %d", &a, &b) != EOF ){
        printf("%d\n", a + b);
    }
    return 0;
}
