#include <iostream>
#include <fstream>
using namespace std;
ifstream    fin ("evaluare.in");
ofstream fout("evaluare.out");
int i;
int expresie() , termen() , factor();
char s[1000001];
int expresie()
{
    int r;
    r=termen();
    while (s[i]=='+'||s[i]=='-')
    {
        if(s[i]=='+')
        {
            i++;
            r+=termen();
        } else {
            i++;
            r-=termen();
        }
    }
    return r;
}
int termen()
{
    int r;
    r=factor();
    while(s[i]=='*'||s[i]=='/')
    {
        if(s[i]=='*')
        {
            i++;
            r*=termen();
        }
        else
        {
            i++;
            r/=termen();
        }
    }
    return r;
}
int factor (){
    int r;
if(s[i]=='(')
{
    i++;
   r= expresie();
   i++;
}
else
{
    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();

}