#include<stdio.h>
#include<math.h>
int main()
{
    long long int a,b;
    char sign;
    scanf("%d%c%d",&a,&sign,&b);
    if(sign=='+')
    {
        printf("%d\n",a+b);
    }
    else if(sign=='-')
    {
        printf("%d\n",a-b);
    }
}
