Thursday, April 14, 2016

LeetCode Q242: 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) {
if(s.length()!=t.length())
return false;
int m[26];
for(int i=0; i<26; i++)
m[i]=0;
for(int i=0; i<s.length(); i++){
char sc = s[i];
char tc = t[i];
m[sc-'a']++;
m[tc-'a']--;
}
for(int i=0; i<26; i++){
if(m[i]!=0)
return false;
}
return true;
}
};

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