Submission #109805

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Source Code Expand

N = gets.to_i
a = Array.new(481, false)
N.times do
  s, e = gets.chomp.split("-").map(&:to_i)
  s = (s / 100) * 60 + (s % 100)
  e = (e / 100) * 60 + (e % 100)
  s -= (s % 5)
  e += (5 - (e % 5)) if e % 5 != 0
  s /= 5
  e /= 5
  for i in s...e
    a[i] = true
  end
end

flag = a[0]
print "0000-" if flag
for i in 0..480
  if flag.!
    if a[i]
      print format("%02d%02d-", (i*5) / 60, (i*5) % 60)
      flag = true
    end
  else
    if a[i].!
      puts format("%02d%02d", (i*5) / 60, (i*5) % 60)
      flag = false
    end
  end
end
puts 2400 if flag

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