#include<bits/stdc++.h>
using namespace std;
using ll = long long;

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    string s; cin >> s;
    ll L = s.size();

    ll left, right;
    char op;
    FOR(i, 1, L){
        if(s[i]=='+' || s[i]=='-'){
            op = s[i];
            left = stoi(s.substr(0, i));
            right = stoi(s.substr(i+1));
            break;
        }
    }

    ll ans;
    if(op=='+'){
        ans = left - right;    
    }else{
        ans = left + right;
    }
    p(ans);
    
    return 0;
}