# include <fstream>
 # include <cstring>
 
 # define dim 100005
 
 using namespace std;
 
 ifstream f("evaluare.in");
 ofstream g("evaluare.out");
 
 char a[ dim ];
 int poz = 0;
 
 inline int rezolva();
 
 inline int valoare()
 {
	 int val = 0;
	 while ( a[ poz ] <= '9' && a[ poz ] >= '0' )
	 {
		 val = val * 10 + ( a[ poz ] - '0' );
		 poz++;
	 }
	// g << val << "\n";
	 return val;
 }
 
 inline int factor()
 {
	 int val = 0;
	 if ( a[ poz ] == '(' )
	 {
		 poz++;
		 val = rezolva();
		 poz++;
	 }
	 else
		 val = valoare();
	 return val;
 }
 
 inline int termen()
 {
	 int val = factor();
	 while ( a[ poz ] == '*' || a[ poz ] == '/' )
	 {
		 if ( a[ poz++ ] == '*' )
			 val = val * factor();
		 else
			 val = val / factor();
		 //poz++;
	 }
	 return val;
 }
 
 inline int rezolva()
 {
	 int val = termen();
	 
	 while ( a[ poz ] == '+' || a[ poz ] == '-' )
	 {
		// g << val << "\n";
		 //poz ++;
		 if ( a[ poz++ ] == '+' )
			 val = val + termen();
		 else
			 val = val - termen();
		 //poz++;
	 }
	 return val;
 }
 
 inline void citire()
 {
	 f.getline( a, dim );
 }
 
 int main()
 {
	 citire();
	 g << rezolva();
	 return 0;
 }