题解 | #求最大连续bit数#正则表达式

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int var = sc.nextInt();
        String binaryString = Integer.toBinaryString(var);
        int len=0;
        if (var==1){
            System.out.println(1);
        }else {
            for (int i = 0; i < binaryString.length(); i++) {
                for (int j = i+1; j <= binaryString.length(); j++) {
                    String sub = binaryString.substring(i, j);
                    if (sub.matches("1*")){
                        if (sub.length()>len){
                            len=sub.length();
                        }
                    }
                }
            }
            System.out.println(len);
        }

    }
}