static StringBuilder findMaximumNum ( StringBuilder str , int n , int k ) {
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( k < 1 ) break ;
    if ( str . charAt ( i ) != '9' ) {
      str . setCharAt ( i , '9' ) ;
      k -- ;
    }
  }
  return str ;
}

static StringBuilder findMaximumNum ( StringBuilder str , int n , int k ) { for ( int i = 0 ; i < n ; i ++ ) { if ( k < 1 ) break ; if ( str . charAt ( i ) != '9' ) { str . setCharAt ( i , '9' ) ; k -- ; } } return str ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (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 (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (break_statement)) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (character_literal)))) (expression_statement (update_expression (identifier))))))) (return_statement (identifier))))