题解 | #整数与IP地址间的转换#

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.function.Function;
import java.util.function.IntFunction;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static java.util.Arrays.*;
import static java.util.stream.Stream.*;


public class Main {
    public static void main(String[] args) throws IOException {

        testTh();
    }

    private static void testTh() throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str;

        while ((str = bf.readLine()) != null) {
            String[] split = str.split("\\.");
            StringBuilder sb = new StringBuilder();
            for (String string : split) {
                String toBinaryString = Integer.toBinaryString(Integer.parseInt(string));
                if (toBinaryString.length() < 8) {
                    while (toBinaryString.length() < 8) {
                        toBinaryString = "0" + toBinaryString;
                    }
                }
                sb.append(toBinaryString);
            }
            BigInteger integer = BigInteger.valueOf(Long.valueOf(sb.toString(),2));


            str = bf.readLine();
            if (str.length() < 10) {
                String s = Integer.toBinaryString(Integer.parseInt(str));
                consult(s, integer);
            } else {
                BigInteger bigInteger = new BigInteger(str);
                String s = bigInteger.toString(2);
                consult(s, integer);
            }
        }


    }
    private static   void consult(String s, BigInteger integer) {
        StringBuilder sb2 = new StringBuilder();
        if (s.length() < 32) {
            for (int i = 0; i < 32 - s.length(); i++) {
                sb2.append("0");
            }
        }
        sb2.append(s);
        String s1 = sb2.toString();
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < 4; i++) {
            Integer integer1 = Integer.valueOf(s1.substring(8 * i, 8 + 8 * i), 2);
            stringBuilder.append(integer1).append(".");
        }
        System.out.println(integer);
        System.out.println(stringBuilder.deleteCharAt(stringBuilder.length() -
                           1).toString());
    }




}