#include<stdio.h>
#include<string.h>
int main()
{
    long long x,y;
    char c;
    scanf("%lld %s %lld",&x,&c,&y);
    if(c=='+')
        printf("%lld\n",x+y);
    else
        printf("%lld\n",x-y);
    return 0;
}
