#include <bits/stdc++.h>
#define mod 1000000000
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int i;
char s[100005];

int expresie();
int termen();
int factor();
int constanta();

int expresie()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
        if(s[i]=='+')
        {
            i++;
            r+=termen();
        }
        else
        {
            i++;
            r-=termen();
        }
    return r;
}
int termen()
{
    int r=factor();
    while(s[i]=='*' || s[i]=='/')
    {
        i++;
        if(s[i-1]=='*')
            r*=factor();
        else
            r/=factor();
    }
    return r;
}
int factor()
{
    int r;
    if(s[i]=='(')
    {
        i++;
        r=expresie();
        i++;
    }
    else
        r=constanta();
    return r;
}
int constanta()
{
    int r=0;
    while(s[i]>='0' && s[i]<='9')
        {
            r=r*10+s[i]-'0';
            i++;
        }
    return r;
}
int main()
{
    fin>>s;
    i=0;
    fout<<expresie();
    return 0;
}