#include <stdio.h>
int main()
{
    long long int a,c;
    char b;
    scanf("%lld %c %lld",&a,&b,&c);
    if(b=='+')
    {
        printf("%lld\n",a+c);
        printf("Since %lld+%lld=%lld, the output should be %lld.\n",a,c,a+c,a+c);
    }
    else if(b=='-')
    {
        if(c>a)
        printf("-%lld\n",c-a);
        else
        printf("%lld\n",a-c);
    }
    return 0;
}
