Consider the following Solidity function contained in a Ethereum contract:

function foo$($uint$256$ x$,$ uint$256$ y$)\{$

while $($uint$256($sha$3($x$))!=$ y$)$

x$++$;

$\}$

Using an x and a y for which this function never terminates, explain how a malicious miner could use this function to waste other miners$$ resources, without spending any of its own resources. $(10$ pts$)$