Given two strings s and t which consist of only lowercase letters.
String t is generated by random shuffling string s and then add one more letter at a random position.
Find the letter that was added in t.
Example:
Input: s = "abcd" t = "abcde" Output: e Explanation: 'e' is the letter that was added.<Solution>
跟 268. Missing Number 概念一樣,可以使用 XOR來找
不同的是,一個是要找少哪一個,這一次要找多哪一個
code 如下
C++
kotlin
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