diff --git a/src/FinalValueOfVariableAfterPerformingOperations2011.java b/src/FinalValueOfVariableAfterPerformingOperations2011.java
deleted file mode 100644
index 9415ab8..0000000
--- a/src/FinalValueOfVariableAfterPerformingOperations2011.java
+++ /dev/null
@@ -1,13 +0,0 @@
-public class FinalValueOfVariableAfterPerformingOperations2011 {
-    public int finalValueAfterOperations(String[] operations) {
-        int res = 0;
-        for (String operation : operations) {
-            if (operation.equals("++X") || operation.equals("X++")) {
-                res++;
-            } else if (operation.equals("--X") || operation.equals("X--")) {
-                res--;
-            }
-        }
-        return res;
-    }
-}
diff --git a/src/main/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011.java b/src/main/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011.java
new file mode 100644
index 0000000..28bab63
--- /dev/null
+++ b/src/main/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011.java
@@ -0,0 +1,23 @@
+// Tags: Array, String, Simulation
+package com.leetcode.easy;
+
+/**
+ * Time Complexity: O(n) where n is the length of the operations array.
+ * We iterate through each operation exactly once.
+ * <p>
+ * Space Complexity: O(1) as we only use a constant amount of extra space
+ * for the result variable, regardless of input size.
+ */
+public class FinalValueOfVariableAfterPerformingOperations2011 {
+    public int finalValueAfterOperations(String[] operations) {
+        int res = 0;
+        for (String operation : operations) {
+            if (operation.charAt(1) == '+') {
+                res++;
+            } else {
+                res--;
+            }
+        }
+        return res;
+    }
+}
diff --git a/src/test/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011Test.java b/src/test/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011Test.java
new file mode 100644
index 0000000..0b43798
--- /dev/null
+++ b/src/test/java/com/leetcode/easy/FinalValueOfVariableAfterPerformingOperations2011Test.java
@@ -0,0 +1,39 @@
+package com.leetcode.easy;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class FinalValueOfVariableAfterPerformingOperations2011Test {
+    private FinalValueOfVariableAfterPerformingOperations2011 solution;
+
+    @BeforeEach
+    void setUp() {
+        solution = new FinalValueOfVariableAfterPerformingOperations2011();
+    }
+
+    @Test
+    void testFinalValueAfterOperations_Example1() {
+        String[] operations = {"--X", "X++", "X++"};
+        int expected = 1;
+        int result = solution.finalValueAfterOperations(operations);
+        assertEquals(expected, result);
+    }
+
+    @Test
+    void testFinalValueAfterOperations_Example2() {
+        String[] operations = {"++X", "++X", "X++"};
+        int expected = 3;
+        int result = solution.finalValueAfterOperations(operations);
+        assertEquals(expected, result);
+    }
+
+    @Test
+    void testFinalValueAfterOperations_Example3() {
+        String[] operations = {"X++", "++X", "--X", "X--"};
+        int expected = 0;
+        int result = solution.finalValueAfterOperations(operations);
+        assertEquals(expected, result);
+    }
+}