static int minChange ( int n , int a [ ] , int b [ ] ) {
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    id [ i ] = i ;
    sz [ i ] = 1 ;
  }
  for ( int i = 0 ;
  i < n ;
  ++ i ) if ( Root ( a [ i ] ) != Root ( b [ i ] ) ) Union ( a [ i ] , b [ i ] ) ;
  int ans = 0 ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) if ( id [ i ] == i ) ans += ( sz [ i ] - 1 ) ;
  return ans ;
}

static int minChange ( int n , int a [ ] , int b [ ] ) { for ( int i = 0 ; i < N ; i ++ ) { id [ i ] = i ; sz [ i ] = 1 ; } for ( int i = 0 ; i < n ; ++ i ) if ( Root ( a [ i ] ) != Root ( b [ i ] ) ) Union ( a [ i ] , b [ i ] ) ; int ans = 0 ; for ( int i = 0 ; i < n ; ++ i ) if ( id [ i ] == i ) ans += ( sz [ i ] - 1 ) ; return ans ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions))) body: (block (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 (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (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: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) consequence: (expression_statement (method_invocation name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (array_access array: (identifier) index: (identifier))))))) (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: (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))))))) (return_statement (identifier))))