#include<fstream.h>
char S[100001],*p=S;
long t();
long f();
long e();
int main()
{ifstream f("evaluare.in");
ofstream g("evaluare.out");
f.get(S,100001);
g<<e();
return 0;
}
long e()
{long x=t();
 if(*p=='+')
 {++p;
  x=x+t();}
 if(*p=='-')
 {++p;
  x=x-t();}
 return x;
}
long t()
{long x=f();
 if(*p=='*')
 {++p;
  x=x*f();}
 if(*p=='/')
 {++p;
  x=x/f();
 }
 return x;
}
long f()
{long x=0;
 if(*p=='(')
 {++p;
  x=e();
  ++p;}
 else
  while(*p>='0'&&*p<='9')
  {x=x*10+*p-'0';
   ++p;}
 return x;
}