Submission #163393

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Source Code Expand

str = gets.chomp.split(//)
str.length.times {|n| str[n] = str[n].ord }

if str[-1] == 97
  if str.length == 1
    puts "-1"
  else
    str.delete_at(-1)
    str.length.times {|n| str[n] = str[n].chr}
    puts str.join
  end
else
  str[-1] -= 1
  str.length.times {|n| str[n] = str[n].chr}
  puts str.join
end

Submission Info

Judge Result