#include <bits/stdc++.h>

using namespace std;

ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");

char *p, s[100005];

int eval()
{
    int rez=termen();
    while (*p=='+'||*p=='-')
    {
        if (*p=='+')
        {
            p++;
            rez+=termen();
        }
        else
        {
            p++;
            rez-=termen();
        }
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while (*p=='*'||*p=='/')
    {
        if (*p=='*')
        {
            p++;
            rez*=factor();
        }
        else
        {
            p++;
            rez/=factor();
        }
    }
    return rez;
}
int factor()
{
    int rez=0;
    if (*p=='(')
    {
        p++;
        rez=eval();
        p++;
    }
    else
    {
        while (*p<='9'&&*p>='0')
        {
            rez=rez*10+*p-'0';
            p++;
        }
    }
    return rez;
}
int main()
{
    cin.getline(s,100000);
    p=s;
    cout << eval();
    return 0;
}