solve #3024: Type of Triangle in java

Author: anishLearnsToCode

README.md

@@ -885,7 +885,7 @@
 | 3010 | [Divide an Array Into Subarrays With Minimum Cost I](https://leetcode.com/problems/divide-an-array-into-subarrays-with-minimum-cost-i)                                 |                                                                         [![Java](assets/java.png)](src/DivideAnArrayIntoSubarraysWithMinimumCostI.java)                                                                          |                                                                                                                                   |
 | 3014 | [Minimum Number of Pushes to Type Word I](https://leetcode.com/problems/minimum-number-of-pushes-to-type-word-i)                                                       |                                                                              [![Java](assets/java.png)](src/MinimumNumberOfPushesToTypeWordI.java)                                                                               |                                                                                                                                   |
 | 3019 | [Number of Changing Keys](https://leetcode.com/problems/number-of-changing-keys)                                                                                       |                                                                                    [![Java](assets/java.png)](src/NumberOfChangingKeys.java)                                                                                     |                                                                                                                                   |
-| 3024 | [Type of Triangle](https://leetcode.com/problems/type-of-triangle)                                                                                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 3024 | [Type of Triangle](https://leetcode.com/problems/type-of-triangle)                                                                                                     |                                                                                       [![Java](assets/java.png)](src/TypeOfTriangle.java)                                                                                        |                                                                                                                                   |
 | 3028 | [Ant on the Boundary](https://leetcode.com/problems/ant-on-the-boundary)                                                                                               |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3032 | 🔒 [Count Numbers With Unique Digits II](https://leetcode.com/problems/count-numbers-with-unique-digits-ii)                                                            |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3038 | [Maximum Number of Operations With the Same Score I](https://leetcode.com/problems/maximum-number-of-operations-with-the-same-score-i)                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/TypeOfTriangle.java

@@ -0,0 +1,22 @@
+// https://leetcode.com/problems/type-of-triangle
+// T: O(1)
+// S: O(1)
+
+public class TypeOfTriangle {
+    public String triangleType(int[] sides) {
+        if (!isValidTriangle(sides)) {
+            return "none";
+        }
+        if (sides[0] == sides[1] && sides[1] == sides[2]) {
+            return "equilateral";
+        }
+        if (sides[0] == sides[1] || sides[0] == sides[2] || sides[1] == sides[2]) {
+            return "isosceles";
+        }
+        return "scalene";
+    }
+
+    private static boolean isValidTriangle(int[] sides) {
+        return sides[0] + sides[1] > sides[2] && sides[0] + sides[2] > sides[1] && sides[1] + sides[2] > sides[0];
+    }
+}