#include <cstdio>
#include <cctype>
#include <cstdlib>
#include <cstring>
using namespace std;
char op[100005],s[100005];
int rez[100005];
int pr(char ch)
{
  switch(ch)
  {
    case '+': return 1;
    case '-': return 1;
    case '*': return 2;
    case '/': return 2;
    default: return 0;
  }
}
int main()
{
  freopen("evaluare.in","r",stdin);
  freopen("evaluare.out","w",stdout);
  int i,top1=0,top2=0,nr;
  char ch;
  scanf("%c",&ch);
  while(isdigit(ch) || ch=='+' || ch=='-' || ch=='*' || ch=='/' || ch=='(' || ch==')')
  {
      if(isdigit(ch))
      {
          nr=ch-'0';
          scanf("%c",&ch);
          while(isdigit(ch))
          {
              nr=nr*10+ch-'0';
              scanf("%c",&ch);
          }
          rez[++top2]=nr;
      }
      else
      {
          if(top1==0)
            op[++top1]=ch;
          else
          {
            if(ch=='(')
                op[++top1]=ch;
            else
            {
              if(pr(op[top1])<pr(ch))
                op[++top1]=ch;
              else
              {
                  if(ch==')')
                    {
                      while(op[top1]!='(')
                      {
                        if(op[top1]=='+')
                            rez[top2-1]=rez[top2-1]+rez[top2];
                        if(op[top1]=='-')
                            rez[top2-1]=rez[top2-1]-rez[top2];
                        if(op[top1]=='*')
                            rez[top2-1]=rez[top2-1]*rez[top2];
                        if(op[top1]=='/')
                            rez[top2-1]=rez[top2-1]/rez[top2];
                        top2--;
                        top1--;
                      }
                      top1--;
                    }
                  else
                  {
                    if(top1 && pr(op[top1])>=pr(ch))
                    {
                      while(pr(op[top1])>=pr(ch) && top1)
                      {
                        if(op[top1]=='+')
                            rez[top2-1]=rez[top2-1]+rez[top2];
                        if(op[top1]=='-')
                            rez[top2-1]=rez[top2-1]-rez[top2];
                        if(op[top1]=='*')
                            rez[top2-1]=rez[top2-1]*rez[top2];
                        if(op[top1]=='/')
                            rez[top2-1]=rez[top2-1]/rez[top2];
                        top2--;
                        top1--;
                      }
                      op[++top1]=ch;
                    }
                }
             }
          }
      }
        scanf("%c",&ch);
      }
  }
  while(top1)
  {
    if(op[top1]=='+')
        rez[top2-1]=rez[top2-1]+rez[top2];
    if(op[top1]=='-')
        rez[top2-1]=rez[top2-1]-rez[top2];
    if(op[top1]=='*')
        rez[top2-1]=rez[top2-1]*rez[top2];
    if(op[top1]=='/')
        rez[top2-1]=rez[top2-1]/rez[top2];
    top2--;
    top1--;
  }
  printf("%d",rez[1]);
    return 0;
}