Warning: Undefined variable $argv in /var/www/html/puzzles/misc/towers-of-hanoi.php on line 14
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/www/html/puzzles/misc/towers-of-hanoi.php:14
Stack trace:
#0 {main}
thrown in /var/www/html/puzzles/misc/towers-of-hanoi.php on line 14