题解 | #整数与IP地址间的转换#

import java.util.Scanner;

public class Main {
   public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String ip = in.nextLine();
        String decimal = in.nextLine();
        String[] split = ip.split("\\.");
        long res = 0;
        for (String s : split) {
            res = res * 256 + Integer.parseInt(s);
        }
        System.out.println(res);

        long dec = Long.parseLong(decimal);
        StringBuilder s = new StringBuilder();
        while (dec != 0) {
            s.insert(0, dec % 256).insert(0, ".");
            dec /= 256;
        }
        System.out.println(s.substring(1));
    }
}