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