lint error 수정

Author: MrKeeplearning

contains-duplicate/MrKeeplearning.java

@@ -1,6 +1,6 @@
 import java.util.*;
 
-public class MrKeeplearning {
+class MrKeeplearningContainsDuplicate {
     public boolean containsDuplicate(int[] nums) {
         HashSet<Integer> hashSet = new HashSet<>();
         for (int num : nums) {
@@ -10,4 +10,4 @@ public boolean containsDuplicate(int[] nums) {
         }
         return false;
     }
-}
+}

valid-palindrome/MrKeeplearning.java

@@ -0,0 +1,6 @@
+class MrKeeplearningValidPalindrome {
+    public boolean isPalindrome(String s) {
+
+        return false;
+    }
+}