static void Read1Node(int targetRRN)
    {
        rIndex_bin.Seek((targetRRN - 1) * SizeOfNode + SizeOfHeaderRec, SeekOrigin.Begin);
        rIndex = new StreamReader(rIndex_bin);
        string[] buffer = rIndex.ReadLine().Split(' ');
        for (int i = 0; i < M-1; i++)
        {
            TP[i] = Int32.Parse(buffer[i * 3]);
            KV[i] = buffer[i * 3 + 1];
            DRP[i] = Int32.Parse(buffer[i * 3 + 2]);
        }
        TP[M - 1] = Int32.Parse(buffer[(M - 1) * 3]);
    }