#include<stdio.h>

int main()
{
    long int b,d;
    char s;

    scanf("%ld %c %ld",&b,&s,&d);


    switch(s)
    {
    case '+':
        printf("%ld\n",b+d);
        break;
    default :
        printf("%ld\n",b-d);
    }

    return 0;

}
