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在lz77中,可以看到仍在使用32位操作系统的long表示32字节,导致部分同学clone测试失败,另一方面在窗口长度上也有部分错误,compare_win会返回匹配的下标加一,所以导致匹配后,offset实际范围为0-4096这个时候winoff_bit取13字节更为合适,在解压函数也应该做相应的修改