#include <bits/stdc++.h>

using namespace std;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

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

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

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

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