static int find_leftmost_unsetbit ( int n ) {
  int ind = - 1 ;
  int i = 1 ;
  while ( n > 0 ) {
    if ( ( n % 2 ) != 1 ) {
      ind = i ;
    }
    i ++ ;
    n >>= 1 ;
  }
  return ind ;
}

static int find_leftmost_unsetbit ( int n ) { int ind = - 1 ; int i = 1 ; while ( n > 0 ) { if ( ( n % 2 ) != 1 ) { ind = i ; } i ++ ; n >>= 1 ; } return ind ; }
(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: (unary_expression operand: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (return_statement (identifier))))