Update DIRECTORY.md

Author: DenizAltunkapan

DIRECTORY.md

@@ -80,6 +80,7 @@
           - 📄 [ECC](src/main/java/com/thealgorithms/ciphers/ECC.java)
           - 📄 [HillCipher](src/main/java/com/thealgorithms/ciphers/HillCipher.java)
           - 📄 [MonoAlphabetic](src/main/java/com/thealgorithms/ciphers/MonoAlphabetic.java)
+          - 📄 [OneTimePadCipher](src/main/java/com/thealgorithms/ciphers/OneTimePadCipher.java)
           - 📄 [PermutationCipher](src/main/java/com/thealgorithms/ciphers/PermutationCipher.java)
           - 📄 [PlayfairCipher](src/main/java/com/thealgorithms/ciphers/PlayfairCipher.java)
           - 📄 [Polybius](src/main/java/com/thealgorithms/ciphers/Polybius.java)
@@ -268,6 +269,7 @@
             - 📄 [BinaryTree](src/main/java/com/thealgorithms/datastructures/trees/BinaryTree.java)
             - 📄 [BoundaryTraversal](src/main/java/com/thealgorithms/datastructures/trees/BoundaryTraversal.java)
             - 📄 [CeilInBinarySearchTree](src/main/java/com/thealgorithms/datastructures/trees/CeilInBinarySearchTree.java)
+            - 📄 [CentroidDecomposition](src/main/java/com/thealgorithms/datastructures/trees/CentroidDecomposition.java)
             - 📄 [CheckBinaryTreeIsValidBST](src/main/java/com/thealgorithms/datastructures/trees/CheckBinaryTreeIsValidBST.java)
             - 📄 [CheckIfBinaryTreeBalanced](src/main/java/com/thealgorithms/datastructures/trees/CheckIfBinaryTreeBalanced.java)
             - 📄 [CheckTreeIsSymmetric](src/main/java/com/thealgorithms/datastructures/trees/CheckTreeIsSymmetric.java)
@@ -287,6 +289,7 @@
             - 📄 [SameTreesCheck](src/main/java/com/thealgorithms/datastructures/trees/SameTreesCheck.java)
             - 📄 [SegmentTree](src/main/java/com/thealgorithms/datastructures/trees/SegmentTree.java)
             - 📄 [SplayTree](src/main/java/com/thealgorithms/datastructures/trees/SplayTree.java)
+            - 📄 [ThreadedBinaryTree](src/main/java/com/thealgorithms/datastructures/trees/ThreadedBinaryTree.java)
             - 📄 [Treap](src/main/java/com/thealgorithms/datastructures/trees/Treap.java)
             - 📄 [TreeRandomNode](src/main/java/com/thealgorithms/datastructures/trees/TreeRandomNode.java)
             - 📄 [Trie](src/main/java/com/thealgorithms/datastructures/trees/Trie.java)
@@ -426,6 +429,7 @@
           - 📄 [AbsoluteMax](src/main/java/com/thealgorithms/maths/AbsoluteMax.java)
           - 📄 [AbsoluteMin](src/main/java/com/thealgorithms/maths/AbsoluteMin.java)
           - 📄 [AbsoluteValue](src/main/java/com/thealgorithms/maths/AbsoluteValue.java)
+          - 📄 [AbundantNumber](src/main/java/com/thealgorithms/maths/AbundantNumber.java)
           - 📄 [AliquotSum](src/main/java/com/thealgorithms/maths/AliquotSum.java)
           - 📄 [AmicableNumber](src/main/java/com/thealgorithms/maths/AmicableNumber.java)
           - 📄 [Area](src/main/java/com/thealgorithms/maths/Area.java)
@@ -452,6 +456,7 @@
           - 📄 [EulerMethod](src/main/java/com/thealgorithms/maths/EulerMethod.java)
           - 📄 [EulerPseudoprime](src/main/java/com/thealgorithms/maths/EulerPseudoprime.java)
           - 📄 [EulersFunction](src/main/java/com/thealgorithms/maths/EulersFunction.java)
+          - 📄 [EvilNumber](src/main/java/com/thealgorithms/maths/EvilNumber.java)
           - 📄 [FFT](src/main/java/com/thealgorithms/maths/FFT.java)
           - 📄 [FFTBluestein](src/main/java/com/thealgorithms/maths/FFTBluestein.java)
           - 📄 [Factorial](src/main/java/com/thealgorithms/maths/Factorial.java)
@@ -628,6 +633,7 @@
           - 📄 [Kinematics](src/main/java/com/thealgorithms/physics/Kinematics.java)
           - 📄 [ProjectileMotion](src/main/java/com/thealgorithms/physics/ProjectileMotion.java)
           - 📄 [SimplePendulumRK4](src/main/java/com/thealgorithms/physics/SimplePendulumRK4.java)
+          - 📄 [SnellLaw](src/main/java/com/thealgorithms/physics/SnellLaw.java)
         - 📁 **puzzlesandgames**
           - 📄 [TowerOfHanoi](src/main/java/com/thealgorithms/puzzlesandgames/TowerOfHanoi.java)
           - 📄 [WordBoggle](src/main/java/com/thealgorithms/puzzlesandgames/WordBoggle.java)
@@ -786,6 +792,7 @@
           - 📄 [StackPostfixNotation](src/main/java/com/thealgorithms/stacks/StackPostfixNotation.java)
           - 📄 [StackUsingTwoQueues](src/main/java/com/thealgorithms/stacks/StackUsingTwoQueues.java)
           - 📄 [TrappingRainwater](src/main/java/com/thealgorithms/stacks/TrappingRainwater.java)
+          - 📄 [ValidParentheses](src/main/java/com/thealgorithms/stacks/ValidParentheses.java)
         - 📁 **strings**
           - 📄 [AhoCorasick](src/main/java/com/thealgorithms/strings/AhoCorasick.java)
           - 📄 [Alphabetical](src/main/java/com/thealgorithms/strings/Alphabetical.java)
@@ -903,6 +910,7 @@
           - 📄 [ECCTest](src/test/java/com/thealgorithms/ciphers/ECCTest.java)
           - 📄 [HillCipherTest](src/test/java/com/thealgorithms/ciphers/HillCipherTest.java)
           - 📄 [MonoAlphabeticTest](src/test/java/com/thealgorithms/ciphers/MonoAlphabeticTest.java)
+          - 📄 [OneTimePadCipherTest](src/test/java/com/thealgorithms/ciphers/OneTimePadCipherTest.java)
           - 📄 [PermutationCipherTest](src/test/java/com/thealgorithms/ciphers/PermutationCipherTest.java)
           - 📄 [PlayfairTest](src/test/java/com/thealgorithms/ciphers/PlayfairTest.java)
           - 📄 [PolybiusTest](src/test/java/com/thealgorithms/ciphers/PolybiusTest.java)
@@ -1070,6 +1078,7 @@
             - 📄 [BinaryTreeTest](src/test/java/com/thealgorithms/datastructures/trees/BinaryTreeTest.java)
             - 📄 [BoundaryTraversalTest](src/test/java/com/thealgorithms/datastructures/trees/BoundaryTraversalTest.java)
             - 📄 [CeilInBinarySearchTreeTest](src/test/java/com/thealgorithms/datastructures/trees/CeilInBinarySearchTreeTest.java)
+            - 📄 [CentroidDecompositionTest](src/test/java/com/thealgorithms/datastructures/trees/CentroidDecompositionTest.java)
             - 📄 [CheckBinaryTreeIsValidBSTTest](src/test/java/com/thealgorithms/datastructures/trees/CheckBinaryTreeIsValidBSTTest.java)
             - 📄 [CheckIfBinaryTreeBalancedTest](src/test/java/com/thealgorithms/datastructures/trees/CheckIfBinaryTreeBalancedTest.java)
             - 📄 [CheckTreeIsSymmetricTest](src/test/java/com/thealgorithms/datastructures/trees/CheckTreeIsSymmetricTest.java)
@@ -1083,6 +1092,7 @@
             - 📄 [QuadTreeTest](src/test/java/com/thealgorithms/datastructures/trees/QuadTreeTest.java)
             - 📄 [SameTreesCheckTest](src/test/java/com/thealgorithms/datastructures/trees/SameTreesCheckTest.java)
             - 📄 [SplayTreeTest](src/test/java/com/thealgorithms/datastructures/trees/SplayTreeTest.java)
+            - 📄 [ThreadedBinaryTreeTest](src/test/java/com/thealgorithms/datastructures/trees/ThreadedBinaryTreeTest.java)
             - 📄 [TreapTest](src/test/java/com/thealgorithms/datastructures/trees/TreapTest.java)
             - 📄 [TreeTestUtils](src/test/java/com/thealgorithms/datastructures/trees/TreeTestUtils.java)
             - 📄 [TrieTest](src/test/java/com/thealgorithms/datastructures/trees/TrieTest.java)
@@ -1170,6 +1180,7 @@
           - 📄 [DinicTest](src/test/java/com/thealgorithms/graph/DinicTest.java)
           - 📄 [EdmondsKarpTest](src/test/java/com/thealgorithms/graph/EdmondsKarpTest.java)
           - 📄 [EdmondsTest](src/test/java/com/thealgorithms/graph/EdmondsTest.java)
+          - 📄 [GomoryHuTreeTest](src/test/java/com/thealgorithms/graph/GomoryHuTreeTest.java)
           - 📄 [HierholzerAlgorithmTest](src/test/java/com/thealgorithms/graph/HierholzerAlgorithmTest.java)
           - 📄 [HierholzerEulerianPathTest](src/test/java/com/thealgorithms/graph/HierholzerEulerianPathTest.java)
           - 📄 [HopcroftKarpTest](src/test/java/com/thealgorithms/graph/HopcroftKarpTest.java)
@@ -1207,6 +1218,7 @@
           - 📄 [AbsoluteMaxTest](src/test/java/com/thealgorithms/maths/AbsoluteMaxTest.java)
           - 📄 [AbsoluteMinTest](src/test/java/com/thealgorithms/maths/AbsoluteMinTest.java)
           - 📄 [AbsoluteValueTest](src/test/java/com/thealgorithms/maths/AbsoluteValueTest.java)
+          - 📄 [AbundantNumberTest](src/test/java/com/thealgorithms/maths/AbundantNumberTest.java)
           - 📄 [AliquotSumTest](src/test/java/com/thealgorithms/maths/AliquotSumTest.java)
           - 📄 [AmicableNumberTest](src/test/java/com/thealgorithms/maths/AmicableNumberTest.java)
           - 📄 [AreaTest](src/test/java/com/thealgorithms/maths/AreaTest.java)
@@ -1232,6 +1244,7 @@
           - 📄 [EulerMethodTest](src/test/java/com/thealgorithms/maths/EulerMethodTest.java)
           - 📄 [EulerPseudoprimeTest](src/test/java/com/thealgorithms/maths/EulerPseudoprimeTest.java)
           - 📄 [EulersFunctionTest](src/test/java/com/thealgorithms/maths/EulersFunctionTest.java)
+          - 📄 [EvilNumberTest](src/test/java/com/thealgorithms/maths/EvilNumberTest.java)
           - 📄 [FFTTest](src/test/java/com/thealgorithms/maths/FFTTest.java)
           - 📄 [FactorialRecursionTest](src/test/java/com/thealgorithms/maths/FactorialRecursionTest.java)
           - 📄 [FactorialTest](src/test/java/com/thealgorithms/maths/FactorialTest.java)
@@ -1388,6 +1401,7 @@
           - 📄 [KinematicsTest](src/test/java/com/thealgorithms/physics/KinematicsTest.java)
           - 📄 [ProjectileMotionTest](src/test/java/com/thealgorithms/physics/ProjectileMotionTest.java)
           - 📄 [SimplePendulumRK4Test](src/test/java/com/thealgorithms/physics/SimplePendulumRK4Test.java)
+          - 📄 [SnellLawTest](src/test/java/com/thealgorithms/physics/SnellLawTest.java)
         - 📁 **puzzlesandgames**
           - 📄 [TowerOfHanoiTest](src/test/java/com/thealgorithms/puzzlesandgames/TowerOfHanoiTest.java)
           - 📄 [WordBoggleTest](src/test/java/com/thealgorithms/puzzlesandgames/WordBoggleTest.java)
@@ -1545,6 +1559,7 @@
           - 📄 [StackPostfixNotationTest](src/test/java/com/thealgorithms/stacks/StackPostfixNotationTest.java)
           - 📄 [StackUsingTwoQueuesTest](src/test/java/com/thealgorithms/stacks/StackUsingTwoQueuesTest.java)
           - 📄 [TrappingRainwaterTest](src/test/java/com/thealgorithms/stacks/TrappingRainwaterTest.java)
+          - 📄 [ValidParenthesesTest](src/test/java/com/thealgorithms/stacks/ValidParenthesesTest.java)
         - 📁 **strings**
           - 📄 [AhoCorasickTest](src/test/java/com/thealgorithms/strings/AhoCorasickTest.java)
           - 📄 [AlphabeticalTest](src/test/java/com/thealgorithms/strings/AlphabeticalTest.java)