#include <fstream>
#include <string.h>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char c,semn[100000],st[10000];
int i,n,k,nr,gasitnr,fp[100000];
long long steval[100];
int main()
{
    while(f>>c)
    {
      if(c>='0'&&c<='9')
      {
        gasitnr=1;
        nr=nr*10+(c-48);
      }
      else
      {
          if(gasitnr)
          {
              n++;
              fp[n]=nr;
              nr=0;
              gasitnr=0;
          }
          if(c=='('||c=='+'||c=='-'||c=='*'||c=='/')
          {
              k++;
              st[k]=c;
              if(st[k]=='+'||st[k]=='-')
              {
                  while(st[k-1]=='+'||st[k-1]=='-'||st[k-1]=='*'||st[k-1]=='/')
                  {
                      n++;
                      semn[n]=st[k-1];
                      st[k-1]=st[k];
                      k--;
                  }
              }
              else
                 if(st[k]=='*'||st[k]=='/')
                 {
                  while(st[k-1]=='*'||st[k-1]=='/')
                  {
                      n++;
                      semn[n]=st[k-1];
                      st[k-1]=st[k];
                      k--;
                  }
              }
          }
          else
            if(c==')')
            {
               while(st[k]!='(')
                  {
                     n++;
                     semn[n]=st[k];
                     k--;
                  }
               k--;
            }
      }
    }
    if(gasitnr)
          {
              n++;
              fp[n]=nr;
              nr=0;
              gasitnr=0;
          }
    while(k)
    {
       n++;
       semn[n]=st[k];
       k--;
    }
 k=0;
 for(i=1;i<=n;i++)
    {
            if(semn[i]!='+'&&semn[i]!='-'&&semn[i]!='*'&&semn[i]!='/')
            {
                k++;
                steval[k]=fp[i];
            }
            else
            {
                 switch(semn[i])
                {
                    case '+':steval[k-1]=steval[k-1]+steval[k];break;
                    case '-':steval[k-1]=steval[k-1]-steval[k];break;
                    case '*':steval[k-1]=steval[k-1]*steval[k];break;
                    case '/':steval[k-1]=steval[k-1]/steval[k];break;
                }
                k--;
            }
    }
    g<<steval[1];
    return 0;
}