static int sumMaxOccurring ( int arr [ ] [ ] ) {
  Map < Integer , Integer > mp = new HashMap < > ( ) ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    for ( int j = 0 ;
    j < M ;
    j ++ ) {
      if ( mp . containsKey ( arr [ i ] [ j ] ) ) {
        mp . put ( arr [ i ] [ j ] , mp . get ( arr [ i ] [ j ] ) + 1 ) ;
      }
      else {
        mp . put ( arr [ i ] [ j ] , 1 ) ;
      }
    }
  }
  int sum = 0 ;
  int maxFreq = Integer . MIN_VALUE ;
  for ( Map . Entry < Integer , Integer > itr : mp . entrySet ( ) ) {
    if ( itr . getValue ( ) > maxFreq ) {
      maxFreq = itr . getValue ( ) ;
    }
  }
  for ( Map . Entry < Integer , Integer > itr : mp . entrySet ( ) ) {
    if ( itr . getValue ( ) == maxFreq ) {
      sum += ( itr . getKey ( ) ) * ( itr . getValue ( ) ) ;
    }
  }
  return sum ;
}

static int sumMaxOccurring ( int arr [ ] [ ] ) { Map < Integer , Integer > mp = new HashMap < > ( ) ; for ( int i = 0 ; i < N ; i ++ ) { for ( int j = 0 ; j < M ; j ++ ) { if ( mp . containsKey ( arr [ i ] [ j ] ) ) { mp . put ( arr [ i ] [ j ] , mp . get ( arr [ i ] [ j ] ) + 1 ) ; } else { mp . put ( arr [ i ] [ j ] , 1 ) ; } } } int sum = 0 ; int maxFreq = Integer . MIN_VALUE ; for ( Map . Entry < Integer , Integer > itr : mp . entrySet ( ) ) { if ( itr . getValue ( ) > maxFreq ) { maxFreq = itr . getValue ( ) ; } } for ( Map . Entry < Integer , Integer > itr : mp . entrySet ( ) ) { if ( itr . getValue ( ) == maxFreq ) { sum += ( itr . getKey ( ) ) * ( itr . getValue ( ) ) ; } } return sum ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions))) body: (block (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)) 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 (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: (array_access array: (identifier) index: (identifier)) index: (identifier))))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)))) right: (decimal_integer_literal)))))) alternative: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) (decimal_integer_literal)))))))))) (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: (field_access object: (identifier) field: (identifier)))) (enhanced_for_statement type: (generic_type (scoped_type_identifier (type_identifier) (type_identifier)) (type_arguments (type_identifier) (type_identifier))) name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))) (enhanced_for_statement type: (generic_type (scoped_type_identifier (type_identifier) (type_identifier)) (type_arguments (type_identifier) (type_identifier))) name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))))) (return_statement (identifier))))