static boolean areElementsContiguous ( int arr [ ] , int n ) {
  int max = Integer . MIN_VALUE ;
  int min = Integer . MAX_VALUE ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    max = Math . max ( max , arr [ i ] ) ;
    min = Math . min ( min , arr [ i ] ) ;
  }
  int m = max - min + 1 ;
  if ( m > n ) return false ;
  boolean visited [ ] = new boolean [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) visited [ arr [ i ] - min ] = true ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) if ( visited [ i ] == false ) return false ;
  return true ;
}

static boolean areElementsContiguous ( int arr [ ] , int n ) { int max = Integer . MIN_VALUE ; int min = Integer . MAX_VALUE ; for ( int i = 0 ; i < n ; i ++ ) { max = Math . max ( max , arr [ i ] ) ; min = Math . min ( min , arr [ i ] ) ; } int m = max - min + 1 ; if ( m > n ) return false ; boolean visited [ ] = new boolean [ n ] ; for ( int i = 0 ; i < n ; i ++ ) visited [ arr [ i ] - min ] = true ; for ( int i = 0 ; i < m ; i ++ ) if ( visited [ i ] == false ) return false ; return true ; }
(method_declaration (modifiers) type: (boolean_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) value: (field_access object: (identifier) field: (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (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: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (array_access array: (identifier) index: (identifier)))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (array_access array: (identifier) index: (identifier)))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (false))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) dimensions: (dimensions) value: (array_creation_expression type: (boolean_type) dimensions: (dimensions_expr (identifier))))) (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: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) right: (true)))) (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: (false))) consequence: (return_statement (false)))) (return_statement (true))))