static int largest_sum ( int arr [ ] , int n ) {
  int maximum = - 1 ;
  HashMap < Integer , Integer > m = new HashMap < Integer , Integer > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( m . containsKey ( arr [ i ] ) ) {
      m . put ( arr [ i ] , m . get ( arr [ i ] ) + 1 ) ;
    }
    else {
      m . put ( arr [ i ] , 1 ) ;
    }
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( m . get ( arr [ i ] ) > 1 ) {
      if ( m . containsKey ( 2 * arr [ i ] ) ) {
        m . put ( 2 * arr [ i ] , m . get ( 2 * arr [ i ] ) + m . get ( arr [ i ] ) / 2 ) ;
      }
      else {
        m . put ( 2 * arr [ i ] , m . get ( arr [ i ] ) / 2 ) ;
      }
      if ( 2 * arr [ i ] > maximum ) maximum = 2 * arr [ i ] ;
    }
  }
  return maximum ;
}

static int largest_sum ( int arr [ ] , int n ) { int maximum = - 1 ; HashMap < Integer , Integer > m = new HashMap < Integer , Integer > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { if ( m . containsKey ( arr [ i ] ) ) { m . put ( arr [ i ] , m . get ( arr [ i ] ) + 1 ) ; } else { m . put ( arr [ i ] , 1 ) ; } } for ( int i = 0 ; i < n ; i ++ ) { if ( m . get ( arr [ i ] ) > 1 ) { if ( m . containsKey ( 2 * arr [ i ] ) ) { m . put ( 2 * arr [ i ] , m . get ( 2 * arr [ i ] ) + m . get ( arr [ i ] ) / 2 ) ; } else { m . put ( 2 * arr [ i ] , m . get ( arr [ i ] ) / 2 ) ; } if ( 2 * arr [ i ] > maximum ) maximum = 2 * arr [ i ] ; } } return maximum ; }
(method_declaration (modifiers) type: (integral_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: (unary_expression operand: (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (decimal_integer_literal)))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (decimal_integer_literal))) consequence: (block (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier)))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier))) (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier))))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (decimal_integer_literal))))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier))) (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (decimal_integer_literal))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier))) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (array_access array: (identifier) index: (identifier)))))))))) (return_statement (identifier))))