static void coordinateCompression ( int arr [ ] , int n ) {
  Set < Integer > s = new HashSet < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    s . add ( arr [ i ] ) ;
  }
  int index = 0 ;
  HashMap < Integer , Integer > mp = new HashMap < Integer , Integer > ( ) ;
  for ( int itr : s ) {
    index ++ ;
    mp . put ( itr , index ) ;
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arr [ i ] = mp . get ( arr [ i ] ) ;
  }
}

static void coordinateCompression ( int arr [ ] , int n ) { Set < Integer > s = new HashSet < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { s . add ( arr [ i ] ) ; } int index = 0 ; HashMap < Integer , Integer > mp = new HashMap < Integer , Integer > ( ) ; for ( int itr : s ) { index ++ ; mp . put ( itr , index ) ; } for ( int i = 0 ; i < n ; i ++ ) { arr [ i ] = mp . get ( 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: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (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: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier) (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier) (type_identifier))) arguments: (argument_list)))) (enhanced_for_statement type: (integral_type) name: (identifier) value: (identifier) body: (block (expression_statement (update_expression (identifier))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (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: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))))))