#include<fstream>
#include<cctype>
using namespace std;
ifstream fi("evaluare.in");
ofstream fo("evaluare.out");

char s[100005];
int i=0;

int expresie();

int factor(){
    int x=0;
    if (s[i]=='('){
                   i++;
                   x=expresie();
                   i++;
                  }
    else while (isdigit(s[i])) {
                                x=x*10+s[i]-48;
                                i++;
                               } 
    return x;
}

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

int expresie(){
    int z;
    z=termen();
    while (s[i]=='+' || s[i]=='-') if (s[i]=='+') {
                                                   i++;
                                                   z+=termen();
                                                  }
                                   else {
                                         i++;
                                         z-=termen();
                                        }
    return z;
}
int main(){
    fi>>s;

    fo<<expresie();
    fi.close();
    fo.close();
    return 0;
}