#include<stdio.h>
void main()
{
    int freaction, sreaction, total;
    scanf("%d",&freaction);
    scanf("%d",&sreaction);
    if(freaction<0 || sreaction<0 || freaction != %f || sreaction != %f)
    {
        printf("Invalid input");
    }
    else
    {
        total=freaction+sreaction;
        printf("%d",total);
    }
}