static int maxSubarrayLength ( int [ ] A , int N ) {
  int maxLen = 0 ;
  int curr_sum = 0 ;
  HashMap < Integer , Integer > hash = new HashMap < Integer , Integer > ( ) ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    if ( A [ i ] % 2 == 0 ) curr_sum -= 1 ;
    else curr_sum += 1 ;
    if ( curr_sum == 0 ) maxLen = Math . max ( maxLen , i + 1 ) ;
    if ( hash . containsKey ( curr_sum ) ) maxLen = Math . max ( maxLen , i - hash . get ( curr_sum ) ) ;
    else {
      hash . put ( curr_sum , i ) ;
    }
  }
  return maxLen ;
}

static int maxSubarrayLength ( int [ ] A , int N ) { int maxLen = 0 ; int curr_sum = 0 ; HashMap < Integer , Integer > hash = new HashMap < Integer , Integer > ( ) ; for ( int i = 0 ; i < N ; i ++ ) { if ( A [ i ] % 2 == 0 ) curr_sum -= 1 ; else curr_sum += 1 ; if ( curr_sum == 0 ) maxLen = Math . max ( maxLen , i + 1 ) ; if ( hash . containsKey ( curr_sum ) ) maxLen = Math . max ( maxLen , i - hash . get ( curr_sum ) ) ; else { hash . put ( curr_sum , i ) ; } } return maxLen ; }
(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: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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)))) (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: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) alternative: (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal))))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier)))))))) (return_statement (identifier))))