写的比较少因为花时间去下载虚拟机了搞了半天https://ac.nowcoder.com/acm/problem/22202https://ac.nowcoder.com/acm/problem/22212https://ac.nowcoder.com/acm/problem/22213https://ac.nowcoder.com/acm/problem/22214https://ac.nowcoder.com/acm/problem/22215zhangxinY