#include <fstream>
#include <cstring>
using namespace std;
ifstream f("expresie.in");
ofstream g("expresie.out");

int expresie(),termen(),factor();
int i,lg;
char s[100100];

int expresie()
{
    int t,nr;
    if(s[i]=='(')
    {
        i++;
        t=termen();
        i++;
    }
    else
    {
        nr=0;
        while('0'<=s[i]&&s[i]<='9')
        {
            nr=nr*10+(s[i]-'0');
            i++;
        }
        t=nr;
    }
    return t;

}


int factor()
{
    int f;
    f=expresie();
    while(i<lg && (s[i]=='*'||s[i]=='/'))
    {
        i++;
        if(s[i-1]=='*')f=f*expresie();
        else f=f/expresie();
    }
    return f;
}

int termen()
{
    int t;
    t=factor();
    while(i<lg && (s[i]=='+'||s[i]=='-'))
    {
        i++;
        if(s[i-1]=='+'){t=t+factor();}
        else t=t-factor();
    }
    return t;
}

int main()
{
    f>>s;
    lg=strlen(s);
    i=0;
    g<<termen();
        return 0;
}