leetcode 66 Plus One ----- java

Given a non-negative number represented as an array of digits, plus one to the number.

The digits are stored such that the most significant digit is at the head of the list.

这道题看了半天，没懂是啥意思。。。结果意思就是数组当成一个数，然后这个数+1。

public class Solution {
    public int[] plusOne(int[] digits) {
        
        int len = digits.length;
        int flag = 1;
        for( int i = len-1;i>=0;i--){
            if( digits[i] + 1 == 10 ){
                digits[i] = 0;
                flag = 1;
            }
            else{
                digits[i]++;
                flag = 0;
                break;
            }
        }
        if( flag == 1){
            int[] result = new int[len+1];
            result[0] = 1;
            for( int i = 1;i<=len;i++)
                result[i] = 0;
            return result;
        }
        return digits;
    
    }
}