static void lexicoSmallestPermuatation ( int arr [ ] , int n ) {
  int cnt [ ] = new int [ n + 1 ] ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    ++ cnt [ arr [ i ] ] ;
  }
  int ele = 1 , replacement = 0 ;
  boolean vis [ ] = new boolean [ n + 1 ] ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    if ( cnt [ arr [ i ] ] == 1 ) {
      continue ;
    }
    while ( cnt [ ele ] > 0 ) {
      ++ ele ;
    }
    if ( ele > arr [ i ] && ! vis [ arr [ i ] ] ) {
      vis [ arr [ i ] ] = true ;
    }
    else {
      -- cnt [ arr [ i ] ] ;
      arr [ i ] = ele ;
      ++ replacement ;
      ++ ele ;
    }
  }
  System . out . print ( replacement + "\n" ) ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    System . out . print ( arr [ i ] + " " ) ;
  }
}

static void lexicoSmallestPermuatation ( int arr [ ] , int n ) { int cnt [ ] = new int [ n + 1 ] ; for ( int i = 0 ; i < n ; ++ i ) { ++ cnt [ arr [ i ] ] ; } int ele = 1 , replacement = 0 ; boolean vis [ ] = new boolean [ n + 1 ] ; for ( int i = 0 ; i < n ; ++ i ) { if ( cnt [ arr [ i ] ] == 1 ) { continue ; } while ( cnt [ ele ] > 0 ) { ++ ele ; } if ( ele > arr [ i ] && ! vis [ arr [ i ] ] ) { vis [ arr [ i ] ] = true ; } else { -- cnt [ arr [ i ] ] ; arr [ i ] = ele ; ++ replacement ; ++ ele ; } } System . out . print ( replacement + " \n " ) ; for ( int i = 0 ; i < n ; ++ i ) { System . out . print ( arr [ i ] + " ▁ " ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (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: (block (expression_statement (update_expression (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (binary_expression left: (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: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier))) right: (decimal_integer_literal))) consequence: (block (continue_statement))) (while_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) body: (block (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))) right: (unary_expression operand: (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier)))))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier))) right: (true)))) alternative: (block (expression_statement (update_expression (array_access array: (identifier) index: (array_access array: (identifier) index: (identifier))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (string_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 (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (string_literal)))))))))