https://www.acmicpc.net/problem/10951
참고링크
https://wanna-b.tistory.com/59
#include <stdio.h>
#include <algorithm>
using namespace std;
int main() {
int a, b;
while (scanf("%d %d", &a, &b) != EOF){
printf("%d\n", a + b);
}
return 0;
}