#include <fstream>
#include <deque>
#include <cstring>

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

char s[100001];
int lg;

deque <int> val;
deque <char> op;

void Read()
{
   fin>>s;
   lg=strlen(s);

   fin.close();
}

int getNumber(int &cursor)
{
  int nr=0;

  while(isdigit(s[cursor]))
  {
    nr*=10;
    nr+=s[cursor]-'0';

    ++cursor;
  }

  --cursor;

  return nr;
}

bool Operator(char x)
{
   if(strchr("+-*/",x)) return 1;
   else return 0;
}

int Prioritate(char x)
{
  if(x=='(') return 0;
  if(x=='+' || x=='-') return 1;
  if(x=='*' || x=='/') return 2;
}

void Do()
{
   int A,B;
   int rez;
   char operatie;
   int prior;
   int NR;

   for(int i=0; i<lg; ++i)
   {
     if(isdigit(s[i]))
     {
       NR=getNumber(i);

       val.push_back(NR);
     }
     if(s[i]=='(') op.push_back(s[i]);

     if(s[i]==')')
     {
       while(op.back()!='(')
        {
          B=val.back(); val.pop_back();
          A=val.back(); val.pop_back();
          operatie=op.back(); op.pop_back();

          if(operatie=='+') rez=A+B;
          if(operatie=='*') rez=A*B;
          if(operatie=='/') rez=A/B;
          if(operatie=='-') rez=A-B;

          val.push_back(rez);
        }
       op.pop_back();
     }
     if(Operator(s[i]))
     {
       prior=Prioritate(s[i]);
       while(!op.empty() && op.back()!='(' && Prioritate(op.back())>=prior)
       {
          B=val.back(); val.pop_back();
          A=val.back(); val.pop_back();
          operatie=op.back(); op.pop_back();

          if(operatie=='+') rez=A+B;
          if(operatie=='*') rez=A*B;
          if(operatie=='/') rez=A/B;
          if(operatie=='-') rez=A-B;

          val.push_back(rez);
       }

       op.push_back(s[i]);
     }
   }

   while(op.size()>0)
   {
     B=val.back(); val.pop_back();
     A=val.back(); val.pop_back();
     operatie=op.back(); op.pop_back();

     if(operatie=='+') rez=A+B;
     if(operatie=='*') rez=A*B;
     if(operatie=='/') rez=A/B;
     if(operatie=='-') rez=A-B;

     val.push_back(rez);
   }

   fout<<val.back()<<'\n';
}

int main()
{
    Read();
    Do();

    return 0;
}