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.
分析:
要求找出s和t中不同的字符。首先记录在t中出现的字符,再减去s中相应的字符,剩下的便是多出来的字符了。
class Solution {
public:
char findTheDifference(string s, string t) {
char res = 0;
for(char c : t)
res += c;
for(char c : s)
res -= c;
return res;
}
};