#include<bits/stdc++.h>

using namespace std;

typedef long long int ll;

int main()
{
    ll a, b, res;

    char c;

    scanf("%lld %c %lld", &a, &c, &b);

    if(c == '+') res = a + b;
    else res = a - b;

    printf("%lld\n", res);

    return 0;
}
