update posts

_posts/2024-04-18-leetcode-347.md

@@ -1,8 +1,20 @@
 ---
 layout: post
-title: (Leetcode) 347 - Top K Frequent Elements
+title: (Leetcode) 347 - Top K Frequent Elements 풀이
 categories: [스터디-알고리즘]
-tags: [자바, java, 스트림, stream, 리트코드, Leetcode, 알고리즘, algorithm]
+tags:
+  [
+    자바,
+    java,
+    스트림,
+    stream,
+    리트코드,
+    Leetcode,
+    알고리즘,
+    algorithm,
+    map,
+    counting,
+  ]
 date: 2024-04-18 12:30:00 +0900
 ---
 
@@ -23,14 +35,13 @@ public int[] topKFrequent(int[] nums, int k) {
     Map<Integer, Integer> counter = new HashMap<>();
 
     Arrays.stream(nums)
-            .forEach(num -> {
-                counter.put(num, counter.getOrDefault(num, 0) + 1);
-            });
+            .forEach(num -> counter.merge(num, 1, Integer::sum));
 
-    return Arrays.copyOfRange(counter.entrySet().stream()
+    return counter.entrySet().stream()
             .sorted(Map.Entry.<Integer, Integer>comparingByValue().reversed())
             .mapToInt(Map.Entry::getKey)
-            .toArray(), 0, k);
+            .limit(k)
+            .toArray();
 }
 ```
 

_posts/2024-07-08-leetcode-91.md

@@ -1,6 +1,6 @@
 ---
 layout: post
-title: (Leetcode) 647 - Decode Ways 풀이
+title: (Leetcode) 91 - Decode Ways 풀이
 categories: [스터디-알고리즘]
 tags:
   [자바, java, 리트코드, Leetcode, 알고리즘, string, dp, dynamic programming]