Merge pull request #2102 from CodingTestStudy2/염혜정

[염혜정] Day29

Author: github-actions[bot]

leetcode3/염혜정/242. Valid Anagram.java

@@ -0,0 +1,20 @@
+// o(n)
+
+class Solution {
+    public boolean isAnagram(String s, String t) {
+        if (s.length() != t.length()) return false;
+        
+        int[] cnt = new int[26];
+        for (int i = 0; i<s.length(); i++) {
+            int ord = (int) s.charAt(i) - 97;
+            cnt[ord]++;
+        }
+
+        for (int i = 0; i<t.length(); i++) {
+            int ord = (int) t.charAt(i) - 97;
+            if (cnt[ord] == 0) return false;
+            cnt[ord]--;
+        }
+        return true;
+    }
+}