大数求和,主要针对华为的oj平台上面的一道题目-Sum of large numbers, mainly for Huawei oj platform above a topic

识别有效的IP地址和掩码并进行分类统计，主要针对华为的oj平台上面的一道题目-Identify valid IP address and mask and classification statistics, mainly for Huawei oj platform above a topic