solves final value of variable after performing operations

Author: anishLearnsToCode

README.md

@@ -480,7 +480,7 @@
 | 1995 | [Count Special Quadruplets](https://leetcode.com/problems/count-special-quadruplets)                                                                      |                                                             [![Java](assets/java.png)](src/CountSpecialQuadruplets.java)                                                             |                                                                                                                                   |
 | 2000 | [Reverse Prefix of Word](https://leetcode.com/problems/reverse-prefix-of-word)                                                                            |                                                               [![Java](assets/java.png)](src/ReversePrefixOfWord.java)                                                               |                                                                                                                                   |
 | 2006 | [Count Number of Pairs With Absolute Difference K](https://leetcode.com/problems/count-number-of-pairs-with-absolute-difference-k)                        |                                                    [![Java](assets/java.png)](src/CountNumberOfPairsWithAbsoluteDifferenceK.java)                                                    |                                                                                                                                   |
-| 2011 | [Final Value of Variable After Performing Operations](https://leetcode.com/problems/final-value-of-variable-after-performing-operations)                  |                                                                                                                                                                                      |                                                                                                                                   |
+| 2011 | [Final Value of Variable After Performing Operations](https://leetcode.com/problems/final-value-of-variable-after-performing-operations)                  |                                                  [![Java](assets/java.png)](src/FinalValueOfVariableAfterPerformingOperations.java)                                                  |                                                                                                                                   |
 | 2016 | [Maximum Difference Between Increasing Elements](https://leetcode.com/problems/maximum-difference-between-increasing-elements)                            |                                                                                                                                                                                      |                                                                                                                                   |
 | 2022 | [Convert 1D Array Into 2D Array](https://leetcode.com/problems/convert-1d-array-into-2d-array)                                                            |                                                                                                                                                                                      |                                                                                                                                   |
 | 2027 | [Minimum Moves to Convert String](https://leetcode.com/problems/minimum-moves-to-convert-string)                                                          |                                                                                                                                                                                      |                                                                                                                                   |

src/FinalValueOfVariableAfterPerformingOperations.java

@@ -0,0 +1,21 @@
+// https://leetcode.com/problems/final-value-of-variable-after-performing-operations
+// T: O(|operations|)
+// S: O(1)
+
+public class FinalValueOfVariableAfterPerformingOperations {
+    public int finalValueAfterOperations(String[] operations) {
+        int x = 0;
+        for (String operation : operations) {
+            x = apply(x, operation);
+        }
+        return x;
+    }
+
+    private int apply(int x, String operation) {
+        return switch (operation) {
+            case "++X", "X++" -> x + 1;
+            case "--X", "X--" -> x - 1;
+            default -> x;
+        };
+    }
+}