Leetcode算法学习日志：IP到CIDR转换

Leetcode 751 IP to CIDR

题目原文

Be required to determine, given a starting IP address ip and the total number of IPs that must be included in the coverage, the representation as a list (of minimal length) of CIDR blocks needed.

A CIDR块由一个IP地址后跟一个斜杠以及前缀长度组成。“例如：123.45.67.89/20。”其中，“该前缀长度为' 该前缀长度' 为' 该数值' ，则表示指定范围内共有多少位共同的前导位数。“在示例中，“123.45.67.89/20”中，“表示在该范围内共有多少位共同的前导位。”

Example 1:

    **Input:** ip = "255.0.0.7", n = 10
    **Output:** ["255.0.0.7/32","255.0.0.8/29","255.0.0.16/32"]
    **Explanation:**
    The initial ip address, when converted to binary, looks like