#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define dbg(x) cout << #x << '=' << x << '\n';
#define ll long long
#define sz size()
#define x first
#define y second
#define pi pair <int, int>
#define pii pair <pi, pi>
#define vi vector <int>
const ll mod = 1e9 + 7;
ll ans;
string s;
int i;

ll termen();
ll factor();

ll eval(){
    ll r=termen();
    while(s[i]=='+' || s[i]=='-'){
        if(s[i]=='+'){
            i++;
            r+=termen();
        }
        else if(s[i]='-'){
            i++;
            r-=termen();
        }
    }
    return r;
}

ll termen(){
    ll r=factor();
    while(s[i]=='*' || s[i]=='/'){
        if(s[i]=='*'){
            i++;
            r*=factor();
        }
        else if(s[i]=='/'){
            i++;
            r/=factor();
        }
    }
    return r;
}

ll factor(){
    ll r=0;
    if(s[i]=='('){
        i++;
        r=eval();
        i++;
       }
    while(s[i]>='0' && s[i]<='9'){
        r=r*10+s[i]-'0';
        i++;
    }
    return r;
}

int32_t main(){
    ios_base :: sync_with_stdio(0); cin.tie(); cout.tie();
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    cin>>s;
    cout<<eval();
}