solves #252: Meeting rooms in java

Author: anishLearnsToCode

README.md

@@ -220,7 +220,7 @@
 | 249  | 🔒 [Group Shifted Strings](https://leetcode.com/problems/group-shifted-strings)                                                                                        |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 250  | 🔒 [Count Univalue Subtrees](https://leetcode.com/problems/count-univalue-subtrees)                                                                                    |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 251  | 🔒 [Flatten 2D Vector](https://leetcode.com/problems/flatten-2d-vector)                                                                                                |                                                                                                                                                                                                                                  |                                                                                                                                   |
-| 252  | 🔒 [Meeting Rooms](https://leetcode.com/problems/meeting-rooms)                                                                                                        |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 252  | 🔒 [Meeting Rooms](https://leetcode.com/problems/meeting-rooms)                                                                                                        |                                                                                        [![Java](assets/java.png)](src/MeetingRooms.java)                                                                                         |                                                                                                                                   |
 | 253  | 🔒 [Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii)                                                                                                  |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 254  | 🔒 [Factor Combinations](https://leetcode.com/problems/factor-combinations)                                                                                            |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 255  | 🔒 [Verify Preorder Sequence In Binary Search Tree](https://leetcode.com/problems/verify-preorder-sequence-in-binary-search-tree)                                      |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/MeetingRooms.java

@@ -0,0 +1,18 @@
+// https://leetcode.com/problems/meeting-rooms
+// T: O(N logN)
+// S: O(logN)
+
+import java.util.Arrays;
+import java.util.Comparator;
+
+public class MeetingRooms {
+    public boolean canAttendMeetings(int[][] intervals) {
+        Arrays.sort(intervals, Comparator.comparingInt(a -> a[0]));
+        for (int i = 0 ; i < intervals.length - 1 ; i++) {
+            if (intervals[i][1] > intervals[i + 1][0]) {
+                return false;
+            }
+        }
+        return true;
+    }
+}