#! /bin/bash 
#srednia
sum=0
lc=0
for n in $(cat num.txt)
do
sum=$((sum+n))
lc=$((lc+1))
done
echo srednia
echo $((sum/lc))

#tablica
arr=$(cat num.txt)

#mediana
if [ $((lc%2)) = 0 ]
then
tmp=$((lc/2))
stp=$(( {arr[$tmp]} + {arr[$((tmp+1))]} ))
echo  $((stp/2))
else
tmpz=$((lc/2))
tmpz=$((tmpz+1))
echo jebac kurwe pierdolono linuksa szmaciarza
echo $tmpz
echo ${arr[tmpz]}
fi