#include <iostream>
#include <fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
const int N=100001;
char s[N];
int p;
int cifra();
int factor();
int termen();
int expresie();

bool cifra(char a)
{
    if(a>=48 && a<=57)
        return 1;
    return 0;
}
int factor()
{
    int val=0,semn=1;
    while(s[p]=='-')
    {
        semn=semn*(-1);
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return val*semn;
    }
    while (cifra(s[p]))
    {
        val=val*10+s[p]-'0';
        p++;
    }
    return val*semn;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}
int expresie()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int main()
{
    in>>s;
    out<<expresie();
    return 0;
}