#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    string s;
    cin >> s;

    int i = 1;
    while(isdigit(s[i]))
        ++ i;
    int x = stoi(s.substr(0, i));
    int y = stoi(s.substr(i+1));

    int ans;
    if(s[i] == '+')
        ans = x - y;
    else
        ans = x + y;
    cout << ans << endl;

    return 0;
}