#include<stdio.h>
int main()
{
    int a,b,res;
    char o;
    scanf("%d%c%d",&a,&o,&b);
    {
        if(o=='+')
        {
            res=a+b;
        }
        else
        {
            res=a-b;
        }
    }
    printf("%d",res);
    return 0;
}
