时间复杂度

参考文献

JAVA 代码

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        char[] arr = str.toCharArray();
        int res = 0 ;
        char t = '0';
        int count = 1;
        for(int i = 0;i<12;i++){
            if(arr[i] == '-') continue;
            res = res + (arr[i]-'0')*(count);
            count++;
        }
        res = res%11;
        if(res == 10){
            t = 'X';
        }else{
            t = String.valueOf(res).charAt(0);
        }
        if(t == arr[12]){
            System.out.println("Right");
        }else{
            System.out.println(str.substring(0,12)+t);
        }

    }
}