private static int countDistinctPrimeFactors ( int n ) {
  int count = 0 ;
  for ( int i = 2 , end = Library . sqrt ( n ) ;
  i <= end ;
  i ++ ) {
    if ( n % i == 0 ) {
      do n /= i ;
      while ( n % i == 0 ) ;
      count ++ ;
      end = Library . sqrt ( n ) ;
    }
  }
  if ( n > 1 ) count ++ ;
  return count ;
}

private static int countDistinctPrimeFactors ( int n ) { int count = 0 ; for ( int i = 2 , end = Library . sqrt ( n ) ; i <= end ; i ++ ) { if ( n % i == 0 ) { do n /= i ; while ( n % i == 0 ) ; count ++ ; end = Library . sqrt ( n ) ; } } if ( n > 1 ) count ++ ; return count ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (block (do_statement body: (expression_statement (assignment_expression left: (identifier) right: (identifier))) condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (update_expression (identifier)))) (return_statement (identifier))))