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.
class Solution {
public:
char findTheDifference(string s, string t) {
map<char,int> count;
for(int i=0;i<s.size();i++)
count[s[i]]++;
for(int i=0;i<t.size();i++){
count[t[i]]--;
if(count[t[i]]==-1)
return t[i];
}
}
};