#include <fstream>
using namespace std;

ifstream f("evaluare.in");
ofstream g("evaluare.out");
int expresie();
int factor();
int term();
char s[100002];
int i=0;
int expresie()
{
    int r=term();
    while(s[i]=='+'||s[i]=='-')
    {
        if(s[i]=='+'){i++;r+=term();}
        else {i++;r-=term();}
    }
    return r;
}
int term()
{
    int r=factor();
    while(s[i]=='*'||s[i]=='/')
    {
        if(s[i]=='*'){i++;r*=factor();}
        else {i++;r/=factor();}
    }
    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()
{
     f>>s;
     g<<expresie();
     return 0;
}