#include <iostream>

using namespace std;

ifstream cin ("evaluare.in");
ofstream cout ("evaluare.out");
const int N=100001;

char s[N];

int p;

int evaluare();
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 val=0,semn=1;
    while(s[p]=='-')
    {
        p++;
        semn*=-1;

    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;

    }
    while(s[p]>='0'&&s[p]<='9')
    {

        val=val*10+(s[p]-'0');
        p++;

    }
    return semn*val;
}
int main()
{

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