leetcdoe Valid Anagram

题目连接

https://leetcode.com/problems/valid-anagram/

Valid Anagram

Description

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.

class Solution {
public:
	bool isAnagram(string s, string t) {
		int A[26] = { 0 }, B[26] = { 0 };
		size_t i, n = s.length(), m = t.length();
		if (n != m) return false;
		for (i = 0; i < n; i++) A[s[i] - 'a']++;
		for (i = 0; i < m; i++) B[t[i] - 'a']++;
		for (i = 0; i < 26; i++) {
			if (A[i] != B[i]) return false;
		}
		return true;
	}
};