题目原址
https://leetcode.com/problems/find-the-difference/description/
题目描述
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:
eExplanation:
‘e’ is the letter that was added.
解题思路
给定两个字符串s和t,其中t字符串是将s字符串的位置打乱并且在一个随意的位置添加一个字符,现在要求找到这个新添加的字符。
解题方法:因为两个字符串只相差一个字符,所以可以使用两个字符串中所有字符和的差来得到相差的这个字符,但是需要注意,因为t比s多一个字符,所以要将这个多的字符单独加一下。
AC代码
class Solution {
public char findTheDifference(String s, String t) {
int ret = t.charAt(s.length());
for(int i = 0; i < s.length(); i++) {
ret -= s.charAt(i);
ret += t.charAt(i);
}
return (char) ret;
}
}
感谢
https://leetcode.com/problems/find-the-difference/discuss/86850/Simple-JAVA-8ms-solution-4-lines