solves #3178: Find the Child Who Has the Ball After K Seconds in java

Author: anishLearnsToCode

Diff for: README.md

@@ -915,9 +915,9 @@
 | 3158 | [Find the XOR of Numbers Which Appear Twice](https://leetcode.com/problems/find-the-xor-of-numbers-which-appear-twice)                                                 |                                                                             [![Java](assets/java.png)](src/FindTheXOROfNumbersWhichAppearTwice.java)                                                                             |                                                                                                                                   |
 | 3162 | [Find the Number of Good Pairs I](https://leetcode.com/problems/find-the-number-of-good-pairs-i)                                                                       |                                                                                  [![Java](assets/java.png)](src/FindTheNumberOfGoodPairsI.java)                                                                                  |                                                                                                                                   |
 | 3168 | [Minimum Number of Chairs in a Waiting Room](https://leetcode.com/problems/minimum-number-of-chairs-in-a-waiting-room)                                                 |                                                                             [![Java](assets/java.png)](src/MinimumNumberOfChairsInAWaitingRoom.java)                                                                             |                                                                                                                                   |
-| 3173 | [Bitwise OR of Adjacent Elements](https://leetcode.com/problems/bitwise-or-of-adjacent-elements)                                                                       |                                                                                         [![Java](assets/java.png)](src/ClearDigits.java)                                                                                         |                                                                                                                                   |
-| 3174 | [Clear Digits](https://leetcode.com/problems/clear-digits)                                                                                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
-| 3178 | [Find the Child Who Has the Ball After K Seconds](https://leetcode.com/problems/find-the-child-who-has-the-ball-after-k-seconds)                                       |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 3173 | 🔒 [Bitwise OR of Adjacent Elements](https://leetcode.com/problems/bitwise-or-of-adjacent-elements)                                                                    |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 3174 | [Clear Digits](https://leetcode.com/problems/clear-digits)                                                                                                             |                                                                                         [![Java](assets/java.png)](src/ClearDigits.java)                                                                                         |                                                                                                                                   |
+| 3178 | [Find the Child Who Has the Ball After K Seconds](https://leetcode.com/problems/find-the-child-who-has-the-ball-after-k-seconds)                                       |                                                                           [![Java](assets/java.png)](src/FindTheChildWhoHasTheBallAfterKSeconds.java)                                                                            |                                                                                                                                   |
 | 3184 | [Count Pairs That Form a Complete Day I](https://leetcode.com/problems/count-pairs-that-form-a-complete-day-i)                                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3190 | [Find Minimum Operations to Make All Elements Divisible by Three](https://leetcode.com/problems/find-minimum-operations-to-make-all-elements-divisible-by-three)       |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3194 | [Minimum Average of Smallest and Largest Elements](https://leetcode.com/problems/minimum-average-of-smallest-and-largest-elements)                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |

Diff for: src/FindTheChildWhoHasTheBallAfterKSeconds.java

@@ -0,0 +1,13 @@
+// https://leetcode.com/problems/find-the-child-who-has-the-ball-after-k-seconds
+// T: O(1)
+// S: O(1)
+
+public class FindTheChildWhoHasTheBallAfterKSeconds {
+    public int numberOfChild(int n, int k) {
+        final boolean isLeftDirection = (k / (n - 1)) % 2 == 0;
+        if (isLeftDirection) {
+            return k % (n - 1);
+        }
+        return n - 1 - (k % (n - 1));
+    }
+}