#include <fstream>
#include <cstring>
#define DIM 100005
using namespace std;
char s[DIM],v[DIM];int i;
int expresie();
int factor() {
   int ret=0;
   if (s[i]=='(') {
        i++;
        ret=expresie();
        ++i;
        return ret;
   }
   while (s[i]>='0' && s[i]<='9') {
       ret=ret*10+s[i]-'0';
       ++i;
   }
   return ret;
}
int termen() {
   int ret=factor();
   while (s[i]=='*' || s[i]=='/') {
       if (s[i]=='*') {
           i++;
           ret=ret*factor();
       }
       else {
         i++;
         ret=ret/factor();
       }
   }
   return ret;
}
int expresie() {
    int ret=termen();
   while (s[i]=='+' || s[i]=='-') {
        if (s[i]=='+') {
            i++;
            ret+=termen();
        }
        else {
            i++;
            ret-=termen();
        }
   }
   return ret;
}
int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f.get(s,DIM);f.get();

    g<<expresie();
    return 0;
}