#!/bin/bash
read h1 h2
hoge=$(($h1 + $h2))
piyo=$(($h1 * $h2))
huga=$(($h1 - $h2))

if [ $hoge -gt $piyo -a $hoge -gt $huga ]; then
	answer=$hoge
fi
if [ $piyo -gt $hoge -a $piyo -gt $huga ]; then
   answer=$piyo
fi
if [ $huga -gt $hoge -a $huga -gt $piyo ]; then
	answer=$huga
fi
echo ${answer}
exit 0