sol: https://ide.codingblocks.com/s/388116
prob: https://hack.codingblocks.com/app/contests/1975/41/problem
lower half of the pattern not working with n = 7
sol: https://ide.codingblocks.com/s/388116
prob: https://hack.codingblocks.com/app/contests/1975/41/problem
lower half of the pattern not working with n = 7