judge.rb

# -*- coding: utf-8 -*-
def parse_max(data)
  puts "要素数："  + data.size.to_s
  max = 0
  max_idx = 0
  data.each_with_index do |val, idx|
    val = val.to_f unless val.kind_of? String
    if max <= val
      max = val
      max_idx = idx
    end
  end
  
  puts "最大値：" + max.to_s
  puts "最大値のインデックス：" + max_idx.to_s
end

array = Array.new
while line = $stdin.gets
  if line =~ /Pred/
    array << line.split[3].to_f
  end
end

parse_max(array)