#include<stdio.h>
int main()
{
    long long int a,b,sum;
    char op;
    scanf("%d %c %d",&a,&op,&b);

    if(op=='+')
    {
        sum= a + b;
    }
    else if(op=='-')
    {
        sum= a - b;
    }
    printf("%lld\n",sum);

    return 0;
}
