#! /bin/bash
# サイコロシミュレータ
#
ans=0
if [ $# -ne 1 ]; then
	echo "usage: die NUMBER_OF_DIES" >&2
	exit 1
else
	num=$1
fi
while (($num>0))
do
	let rand=${RANDOM}%6+1
	let ans=$ans+$rand
	let num=num-1
done
echo $ans