Submission #122928

---

Source Code Expand

#!/bin/bash
# your code goes here


read N K
read R

if [ $K -eq 1 ]; then
	R=( $( echo $R | sed -e "s/ /\n/g" | sort -rn | sed -e "s/\n/ /g" ) )
else
	R=( $( echo $R | sed -e "s/ /\n/g" | sort -n  | sed -e "s/\n/ /g" ) )
fi

ANS=0

for (( i = N-K; i < N; ++i ))
do
	ANS=$( echo "scale=8; ( $ANS + ${R[$i]} ) / 2.0" | bc )
done

echo $ANS

Submission Info

Judge Result