1904. Second Largest Digit in a String

难度: Easy

题目描述

Given an alphanumeric string s, return the second largest numerical digit that appears in s, or -1 if it does not exist.

An alphanumericstring is a string consisting of lowercase English letters and digits.

 

Example 1:

Input: s = "dfa12321afd"
Output: 2
Explanation: The digits that appear in s are [1, 2, 3]. The second largest digit is 2.

Example 2:

Input: s = "abc1111"
Output: -1
Explanation: The digits that appear in s are [1]. There is no second largest digit. 

 

Constraints:

• 1 <= s.length <= 500
• s consists of only lowercase English letters and digits.

解题思路

代码实现

解决方案

java

class Solution {
    public int secondHighest(String s) {
        
    }
}