solves h index ii

Author: anishLearnsToCode

README.md

@@ -224,7 +224,7 @@
 | 270  | 🔒 [Closest Binary Search Tree Value](https://leetcode.com/problems/closest-binary-search-tree-value)                                                     |                                                                                                                                                                                                                                          |                                                                                                                                   |
 | 271  | 🔒 [Encode and Decode Strings](https://leetcode.com/problems/encode-and-decode-strings)                                                                   |                                                                                                                                                                                                                                          |                                                                                                                                   |
 | 274  | [H-Index](https://leetcode.com/problems/h-index)                                                                                                          |                                                                                                                 [![Java](assets/java.png)](src/HIndex.java)                                                                                                                         |                                                                                                                                   |
-| 275  | [H-Index II](https://leetcode.com/problems/h-index-ii)                                                                                                    |                                                                                                                                                                                                                                          |                                                                                                                                   |
+| 275  | [H-Index II](https://leetcode.com/problems/h-index-ii)                                                                                                    |                                                                                                                                                            [![Java](assets/java.png)](src/HIndexII.java)                                                                              |                                                                                                                                   |
 | 276  | 🔒 [Paint Fence](https://leetcode.com/problems/paint-fence)                                                                                               |                                                                                                                                                                                                                                          |                                                                                                                                   |
 | 277  | 🔒 [Find The Celebrity](https://leetcode.com/problems/find-the-celebrity)                                                                                 |                                                                                                                                                                                                                                          |                                                                                                                                   |
 | 278  | [First Bad Version](https://leetcode.com/problems/first-bad-version)                                                                                      |                                                             [![Java](assets/java.png)](src/FirstBadVersion.java) [![Python](assets/python.png)](python/first_bad_version.py)                                                             |                                                                                                                                   |

src/HIndexII.java

@@ -0,0 +1,20 @@
+// https://leetcode.com/problems/h-index-ii
+// T: O(log(N))
+// S: O(1)
+
+public class HIndexII {
+    public static void main(String[] args) {
+        System.out.println(hIndex(new int[] {0, 5, 5, 5, 5}));
+    }
+
+    public static int hIndex(int[] citations) {
+        int left = 0, right = citations.length - 1, middle;
+        while (left <= right) {
+            middle = left + (right - left) / 2;
+            if (citations[middle] == citations.length - middle) return citations[middle];
+            else if (citations[middle] > citations.length - middle) right = middle - 1;
+            else left = middle + 1;
+        }
+        return citations.length - left;
+    }
+}