#include <fstream>
using namespace std;
int expresie();
int termen();
int factor();
char c[100100];
int i;
ifstream fin ("evaluare.in");
ofstream fout("evaluare.out");
int expresie() {
    int sol=termen();
    while (c[i]=='+'||c[i]=='-') {
        if (c[i]=='+') {
            i++;
            sol+=termen();
        }
        else {
            i++;
            sol-=termen();
        }
    }
    return sol;
}

int termen() {
    int sol=factor();
    while (c[i]=='*'||c[i]=='/') {
        if (c[i]=='*') {
            i++;
            sol*=factor();
        }
        else {
            i++;
            sol/=factor();
        }
    }
    return sol;
}

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

int main () {
    fin>>c;
    i=0;
    fout<<expresie();
    return 0;
}