#include <fstream>
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
char s[1000001];
int i;
int constanta();
int factor();
int termen();
int expresie();
int expresie() {
    int r=termen();
    while(s[i]=='+' || s[i]=='-'){
        if (s[i]=='+'){
            i++;
        r +=termen();
        }
        if(s[i]=='-'){
            i++;
        r-=termen();
        }
    }
    return r;
}
int termen(){
    int r=factor();
    while(s[i] == '*' || s[i] == '/'){
        if (s[i]=='*'){
            i++;
        r *= factor();
        }
        if(s[i]=='/'){
            i++;
        r /= factor();
        }
    }
    return r;
}
int factor(){
    int r;
    if (s[i]=='('){
        i++;
        r=expresie();
    i++;
    }else
        r=constanta();
    return r;
}
int constanta() {
    int r=0;
    while(s[i]>='0' && s[i]<='9'){
        r=r*10+s[i]-'0';
    i++;
    }
return r;
}
int main(){
    fin>>s;
    i=0;
    fout<<expresie();
}