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