https://www.hackerrank.com/challenges/saveprincess

saveprincess.rb

#!/usr/bin/env ruby
# Head ends here
def displayPathtoPrincess(m,grid)
  #find the princess
  mid = (m/2).ceil + 1
  man = [mid,mid]
  m -=1

  if grid[0][0] == 'p'
    #walk up
    while man[0] > 0 do
      man[0] -= 1
      print "UP\n"
    end
    #walk left
    while man[1] > 0 do
      man[1] -= 1
      print "LEFT\n"
    end
  
  elsif grid[0][m] == 'p'
    while man[0] > 0 do
      man[0] -= 1
      print "UP\n"
    end
    #walk right
    while man[1] <= m do
      man[1] += 1
      print "RIGHT\n"
    end
  elsif grid[m][0] == 'p'
    while man[0] <= m do
      man[0] += 1
      print "DOWN\n"
    end
    #walk left
    while man[1] > 0 do
      man[1] -= 1
      print "LEFT\n"
    end
  end
  
  if grid[m][m] == 'p'
    while man[0] <= m do
      man[0] += 1
      print "DOWN\n"
    end
    while man[1] <= m do
      man[1] += 1
      print "RIGHT\n"
    end
  end
end
# Tail starts here
m = gets.to_i

grid = Array.new(m)

(0...m).each do |i|
    grid[i] = gets.strip
end

displayPathtoPrincess(m,grid)