#include <iostream>
#include <fstream>

using namespace std;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

char s[100000];
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]=='-') {
        semn=-semn;
        p++;
    }
    if (s[p]=='(') {
            p++;
            val=expresie();
            p++;
            return val*semn;
    }
    while (s[p]>='0' && s[p]<='9') {
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}

int main()
{
    f.get(s,100000);
    g<<expresie();
}