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.
public class Solution {
public char findTheDifference(String s, String t) {
int[] chars = new int[26];
for(int i=0;i<s.length();i++){
chars[s.charAt(i) - 'a']++;
}
for(int i=0;i<t.length();i++){
chars[t.charAt(i) - 'a'] --;
if(chars[t.charAt(i) - 'a'] <0){
return t.charAt(i);
}
}
return 0;
}
}
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Original author: Jake Tao Source: 「LeetCode – 389. Find the Difference」
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