Looping an array by indexing some element in array itself

array_john_subci.rb

def self.readfile
        ### best case for indexing text file containing number followed by total number of paragraph                       
        file = File.open('test.in').read
        readresult = file.split("\n")
        filelength = readresult.length
        i = 0
        x = 0
        m = 0
        reschild = Array.new
        resparent = Array.new
        while (i < filelength) do
            count_row = Integer(readresult[i])
            length_text = Integer(readresult[i+1])
            if (count_row > 0)
                first_x = i + 2
                reschild = Array.new
                x = first_x
                while (x < count_row + i + 2) do
                    reschild.push(readresult[x])
                    x += 1
                end
                i = x
                resparent.push(reschild)
            else
                break
            end
            m += 1
        end
        return resparent
    end

example input

ar = ["5", "3", "jhj", "opp", "tyt", "hkl", "aji", "6", "3", "kak", "lop", "gyt", "uyt", "ert", "wqa", "2", "3", "hhh", "bbb", "2", "5", "jonru", "bando"]

output

[["jhj", "opp", "tyt", "hkl", "aji"], ["kak", "lop", "gyt", "uyt", "ert", "wqa"], ["hhh", "bbb"], ["jonru", "bando"]]

Input file as test

5
3
jhj
opp
tyt
hkl
aji
as
6
3
kak
lop
gyt
uyt
ert
wqa
ac
2
3
hhh
bbb
avv
2
5
jonru
bando
we