Sort-242. Valid Anagram

Given two strings s and t, write a function to determine if t is an anagram of s.

For example,
s = "anagram", t = "nagaram", return true.
s = "rat", t = "car", return false.

Note:
You may assume the string contains only lowercase alphabets.

Follow up:
What if the inputs contain unicode characters? How would you adapt your solution to such case?

class Solution {
 public:
     bool isAnagram(string s, string t){
         sort(s.begin(), s.end());
         sort(t.begin(), t.end());
         return s==t;
     }
 };