#include <fstream>

using namespace std;
ifstream f ("evaluare.in");
ofstream g ("evaluare.out");
int const NM = 1 + 1e5;
char s [NM];
int p;
int nextterm ();
int nextfact ();
int exp ();
int exp (){
    int sum = nextterm ();
    while (s [p] == '+' || s [p] == '-'){
        if (s [p] == '+')
            ++ p , sum += nextterm ();
        else
            ++ p , sum -= nextterm ();
    }
    return sum;
}
int nextterm (){
    int prod = nextfact ();
    while (s [p] == '*' || s [p] == '/'){
        if (s [p] == '*')
            ++ p , prod *= nextfact ();
        else
            ++ p , prod /= nextfact ();
    }
    return prod;
}
int nextfact (){
    int semn = 1 , val = 0;
    while (s [p] == '-')
        semn = -semn , ++ p;
    if (s [p] == '('){
        ++ p;
        val = exp ();
        ++ p;
        return semn * val;
    }
    while (isdigit (s [p]))
        val = val * 10 + (s [p] - '0') , ++ p;
    return semn * val;
}
int main()
{
    f >> s;
    f . close ();
    g << exp ();
    return 0;
}