zad 7

#!/bin/bash

a=1
z=-1
s=0
x=10
y=0
while [ $a -le 10 ]
do
  s=$[x*x] # 10x10,9x9,...
  y=$[s+y] # 100,81,...
  x=$[x+z] # 10,9,...
  a=$[a+1]
done

echo "Do zbudowania piramidy 10x10 potrzeba $y cegieł"