Improved task 1796.

Author: javadev

src/main/java/g1701_1800/s1796_second_largest_digit_in_a_string/readme.md

@@ -1 +1,28 @@
-1796\.
+1796\. Second Largest Digit in a String
+
+Easy
+
+Given an alphanumeric string `s`, return _the **second largest** numerical digit that appears in_ `s`_, or_ `-1` _if it does not exist_.
+
+An **alphanumeric** string 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/or digits.