#include <bits/stdc++.h>

using namespace std;

int p;
char s[100002];
int expresie();
int termen();
int factor();

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

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

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

int main()
{
    cin>>s;
    cout<<expresie();
    return 0;
}