C :

# include <stdio.h>
int main()
{
  int a, b, c, d ;
  scanf("%d %d\n%d %d\n",&a,&b,&c,&d);
  printf("%d\n%d\n",a+b,c+d);
  return 0;
}
  

C++ :

#include<stdio.h>
int main()
{
	int a,b;
	while (scanf("%d%d",&a,&b)!=EOF)
	{
		printf("%d\n",a+b);
	}
	return 0;
}