#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
string s;
int i;
int prod(), elem();
int ecuatie()
{
    int sum=prod();
    while(s[i]=='+' || s[i]=='-')
    {
        ++i;
        if(s[i-1]=='+')
            sum+=prod();
        else sum-=prod();

    }
    return sum;
}
int prod()
{
    int a=elem();
    while(s[i]=='*' || s[i]=='/')
    {
        ++i;
        if(s[i-1]=='*')
            a*=elem();
        else a/=elem();

    }
    return a;
}
int elem()
{
    int semn=1, b=0;
    if(s[i]=='-')
    {
        semn*=-1;
        ++i;
    }

    if(s[i]=='(')
    {
        ++i;
        b=ecuatie();
        ++i;
    }

    while(s[i]>='0' && s[i]<='9')
    {
        b=b*10+s[i]-'0';
        ++i;
    }
    return semn*b;
}

int main()
{
    fin>>s;
    i=0;
    fout<<ecuatie();

    return 0;
}