ゴミ

prob25.rb

def upto_fibonacci(i,list)
  return 1 if i == 1
  list[i] = list[i-1].to_i + list[i-2].to_i
  return list[i]
end
list = [0,1]
i = 1
while upto_fibonacci(i,list).to_s.length < 1000
  i+=1
end
p i