static int minCost ( char [ ] str1 , char [ ] str2 , int n ) {
  int cost = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( str1 [ i ] != str2 [ i ] ) {
      if ( i < n - 1 && str1 [ i + 1 ] != str2 [ i + 1 ] ) {
        swap ( str1 , i , i + 1 ) ;
        cost ++ ;
      }
      else {
        cost ++ ;
      }
    }
  }
  return cost ;
}

static int minCost ( char [ ] str1 , char [ ] str2 , int n ) { int cost = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( str1 [ i ] != str2 [ i ] ) { if ( i < n - 1 && str1 [ i + 1 ] != str2 [ i + 1 ] ) { swap ( str1 , i , i + 1 ) ; cost ++ ; } else { cost ++ ; } } } return cost ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (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))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) consequence: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (update_expression (identifier)))) alternative: (block (expression_statement (update_expression (identifier))))))))) (return_statement (identifier))))