#include<fstream>
using namespace std;
int i;
char ch[100005];
int termen();
int expresie();
int factor();
int expresie(){
    int r = termen();
    while (ch[i] == '+' || ch[i] == '-') {
        if (ch[i] == '+') {
            i++;
            r += termen();
        } else {
            i++;
            r-=termen();
        }
    }
    return r;
}
int termen(){
    int r = factor();
    while (ch[i] == '*' || ch[i] == '/') {
        if (ch[i] == '*') {
            i++;
            r *= factor();
        } else {
            i++;
            r/=factor();
        }
    }
    return r;
}

int factor(){
    int r;
    if (ch[i] == '(') {
        i++;
        r = expresie();
        i++;
    } else {
        r = 0;
        while (ch[i] >= '0' && ch[i] <= '9') {
            r = r * 10 + ch[i] - '0';
            i++;
        }
    }

    return r;
}
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int main(){
    in>>ch;
    out<<expresie();
return 0;
}