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