#include<fstream>
#include<string>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
const int NMAX = 100009;
string s;
int p = 0;

long eval();
long termen();
long factor();

long eval()
{

    long r = termen();
    while(s[p] == '+' || s[p] == '-'){
        if(s[p] == '+'){
            ++p;
            r+=termen();
        }
        else if(s[p] == '-'){
            ++p;
            r-=termen();
        }
    }
    return r;
}

long termen()
{

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

long factor()
{

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

int main()
{

    in>>s;
    out<<eval();
    return 0;
}