#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
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

void vprint(vector<ll> A){
    ll L = A.size();
    FOR(i, 0, L){
        if(i) cout << ' ';
        cout << A[i];
    }
    cout << endl;
}

// 構文解析セット
typedef string::const_iterator State;
class ParseError {};
ll number(State &begin) {
    ll ret = 0;
    while (isdigit(*begin)) {
        ret *= 10;
        ret += *begin - '0';
        begin++;
    }
    return ret;
}
ll term(State &begin) {
    ll ret = number(begin);
    for (;;) {
        if (*begin == '*') {
            begin++;
            ret *= number(begin);
        } else if (*begin == '/') {
            begin++;
            ret /= number(begin);
        } else {
            break;
        }
    }
    return ret;
}
ll expression(State &begin) {
    ll ret = term(begin);
    for (;;) {
        if (*begin == '+') {
            begin++;
            ret += term(begin);
        } else if (*begin == '-') {
            begin++;
            ret -= term(begin);
        } else {
            break;
        }
    }
    return ret;
}
// 構文解析セットおわり

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

    // input
    string s; cin >> s;
    State it = s.begin();
    ll value = expression(it);
    p(value);
    
    return 0;
}