#include<stdio.h>
int main()
{
    int r1,r2,t;
    scanf("%d %d",&r1,&r2);
    if (r1<=0) || r2<=0)
    {
        printf("Invalid input");
    }
    else
    {
        t=r1+r2;
        printf("%d",t);
    }
    return 0;
}