#include <bits/stdc++.h>

using namespace std;
ifstream fin ("evaluare.in" );
ofstream fout ("evaluare.out");
int i;
char s[100005];
int evaluare();
int termen();
int factor();
int evaluare() {
    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]=='/') {
        if (s[i]=='*') {
            i++;
            r*=factor();
        }
        else {
            i++;
            r/=factor();
        }
    }
    return r;
}
int factor ()
{
    int r=0;
    if (s[i]=='(') {
        i++;
        r=evaluare();
        i++;
    }
    else {
        while(isdigit(s[i])==true) {
            r=r*10+s[i]-'0';
            i++;
        }
    }
    return r;
}
int main()
{
    fin>>s;
    fout<<evaluare ();
    return 0;
}