#include<iostream>
#include<cstdio>

using namespace std;

int main()
{   
    char op = '+';
    int a , b ;
    scanf("%d %c %d",&a,&op,&b);

    if(op == '+')
        printf("%d\n",a + b);
    else
        printf("%d\n",a - b);

    return 0;
}