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

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