#include<stdio.h>
int main()
int a,b;
if(scanf("%d %d",&a,&b)!=2){
    printf("Invalid input");
    return 0;
}
if (a<0 || b<0 || a>1000 || b>1000);{
    printf("Invalid input");
}
else{
    int total mass = a+b;
    printf("%d",totalmass);
  }
return 0;
}