#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int r,i,n;
string s;

int grad1();
int grad2();
int expresie();

int expresie(){
    int r = grad1();
    while(i<n && (s[i]=='+' || s[i]=='-')){
        i++;
        if(s[i-1] == '+')
            r += grad1();
        else
            r -= grad1();
    }
    return r;
}

int grad1(){
    int r = grad2();
    while(i<n && (s[i]=='*' || s[i]=='/')){
        i++;
        if(s[i-1] == '*')
            r *= grad2();
        else
            r /= grad2();
    }
    return r;
}

int grad2(){
    int r=0;
    if(s[i] == '('){
        i++;
        r = expresie();
        i++;
    }else{
        while(i<n && s[i]>= '0' && s[i]<='9'){
            r = r*10+s[i]-'0';
            i++;
        }
    }
    return r;
}

int main()
{
    fin>>s;
    n=s.size();
    fout<<expresie();
    return 0;
}