#include<stdio.h>
int main()
{
    int reactant1,reactant2,totalmass;
    scanf("d",&reactant1);
    scanf("d",&reactant2);
    if(reactant1<=1||reactant2<=1)
    {
        printf("Invalid input");
    }
    else
    {
        totalmass=reactant1+reactant2;
        printf("%d",totalmass);
    }
    return 0;
}