#include <fstream>

using namespace std;

const int N = 100000;

char s[N+1];
int p;
int expresie();
int termen();
int factor();

int expresie()
{
    int sum = termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}

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

int factor()
{
    int semn = 1, val = 0;
    while(s[p]=='-')
    {
        p++;
        semn = -semn;
    }
    if(s[p]=='(')
    {
        p++;
        val = expresie();
        p++;
        return semn * val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val = val*10 + (s[p]-'0');
        p++;
    }
    return semn * val;
}

int main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    in >> s;
    in.close();
    out << expresie();
    out.close();
    return 0;
}