solves #2717: Semi-Ordered Permutation in java

Author: anishLearnsToCode

README.txt

@@ -828,7 +828,7 @@
 | 2706 | [Buy Two Chocolates](https://leetcode.com/problems/buy-two-chocolates)                                                                                                 |                                                                                   [![Java](assets/java.png)](src/BuyTwoChocolates.java)                                                                                          |                                                                                                                                   |
 | 2710 | [Remove Trailing Zeros From a String](https://leetcode.com/problems/remove-trailing-zeros-from-a-string)                                                               |                                                                                   [![Java](assets/java.png)](src/RemoveTrailingZerosFromAString.java)                                                                            |                                                                                                                                   |
 | 2716 | [Minimize String Length](https://leetcode.com/problems/minimize-string-length)                                                                                         |                                                                                   [![Java](assets/java.png)](src/MinimizeStringLength.java)                                                                                      |                                                                                                                                   |
-| 2717 | [Semi-Ordered Permutation](https://leetcode.com/problems/semi-ordered-permutation)                                                                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2717 | [Semi-Ordered Permutation](https://leetcode.com/problems/semi-ordered-permutation)                                                                                     |                                                                                   [![Java](assets/java.png)](src/SemiOrderedPermutation.java)                                                                                                                                               |                                                                                                                                   |
 | 2728 | [Count Houses in a Circular Street](https://leetcode.com/problems/count-houses-in-a-circular-street)                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2729 | [Check if The Number is Fascinating](https://leetcode.com/problems/check-if-the-number-is-fascinating)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2733 | [Neither Minimum nor Maximum](https://leetcode.com/problems/neither-minimum-nor-maximum)                                                                               |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/SemiOrderedPermutation.java

@@ -0,0 +1,25 @@
+// https://leetcode.com/problems/semi-ordered-permutation
+// T: O(N)
+// S: O(1)
+
+import java.util.Arrays;
+
+public class SemiOrderedPermutation {
+    public int semiOrderedPermutation(int[] nums) {
+        final int startIndex = findIndexOf(nums, 1);
+        final int endIndex = findIndexOf(nums, nums.length);
+        final int endDrift = nums.length - endIndex - 1;
+
+        if (endIndex < startIndex) {
+            return startIndex + endDrift - 1;
+        }
+        return startIndex + endDrift;
+    }
+
+    private int findIndexOf(int[] array, int element) {
+        for (int i = 0 ; i < array.length ; i++) {
+            if (array[i] == element) return i;
+        }
+        return -1;
+    }
+}