#include <fstream>

using namespace std;

ifstream input("evaluare.in");
ofstream output("evaluare.out");

char s[100000],*p;
int nr;

int eval();
int termen();
int factor();

int eval()
{
    int r = termen();
    while((*p=='+') || (*p=='-'))
    {
        if (*p=='+') {p++;r+=termen();}
        if (*p=='-') {p++;r-=termen();}
    }
    return r;

}
int termen()
{
    int r = factor();
    while ((*p=='*')|| (*p=='/'))
    {
        if (*p=='*') {p++;r*=factor();}
        if (*p=='/') {p++;r/=factor();}
    }
    return r;
}
int factor()
{
    int r;
    r=0;
    if(*p=='(')
    {
        p++;r=eval();p++;
    }
    else
    {
        while('0'<=*p && *p<='9')
        {
            r*=10;
            r+=(int)*p-'0';
            p++;
        }
    }
    return r;
}

int main()
{
    input.get(s,100000);
    p = s;
    nr = eval();
    output << nr;
    return 0;
}