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