HDU 1090 A+B for Input-Output Practice (II)

#include <cstdio>
int main()
{
  int n,a,b;
  scanf("%d",&n);
  for (int i=; i<=n; i++)
  {
    scanf("%d%d",&a,&b);
    printf("%d\n",a+b);
  }
  return ;
}