//Keep working hard :)
#include <bits/stdc++.h>
using namespace std;

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

const int N = 1e5+5;
int a[N];

void fileIO()
{
        #ifndef ONLINE_JUDGE
        freopen("int.txt","r",stdin);
        freopen("out.txt","w",stdout);
        #endif
}
int main()
{
	IOS;
       // fileIO();
        int a,b;
        char c;
        cin >> a >> c  >> b;
        switch(c)
        {
                case '+':
                        cout << a+b;
                        exit(0);
                case '-':
                        cout << a-b;
                        exit(0);
        }
	return 0;
}
