From eb5d12e246803b0aa4cfebaaeeaf15ceb90cef18 Mon Sep 17 00:00:00 2001
From: sey2 <54762273+sey2@users.noreply.github.com>
Date: Thu, 25 Aug 2022 06:06:02 +0900
Subject: [PATCH] H-index - leve2

---
 programmers/H-Index.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 programmers/H-Index.java

diff --git a/programmers/H-Index.java b/programmers/H-Index.java
new file mode 100644
index 0000000..c6d8865
--- /dev/null
+++ b/programmers/H-Index.java
@@ -0,0 +1,17 @@
+import java.util.Collections;
+import java.util.Arrays;
+
+class Solution {
+    public int solution(int[] citations) {
+        Integer[] tmp = Arrays.stream(citations).boxed().toArray(Integer[]::new);
+        Arrays.sort(tmp,Collections.reverseOrder());
+
+        int len = tmp.length;
+
+        for(int i=0; i<len; i++){
+            if(tmp[i] <= i) return i;
+        }
+
+        return len;
+    }
+}