https://leetcode.com/problems/valid-anagram/

Author: harshitgindra

LeetCodeSolutions/HashMap/Valid Anagram.cs

@@ -0,0 +1,47 @@
+
+namespace LeetCodeSolutions.HashMap
+{
+    class Valid_Anagram
+    {
+        public bool IsAnagram(string s, string t)
+        {
+            if (s.Length != t.Length) return false;
+
+            Dictionary<char, int> counts = new Dictionary<char, int>();
+
+            foreach (char c in s)
+            {
+                counts[c] = counts.GetValueOrDefault(c, 0) + 1;
+            }
+
+            foreach (char c in t)
+            {
+                if (!counts.ContainsKey(c) || counts[c] == 0) return false;
+                counts[c]--;
+            }
+
+            return true;
+        }
+
+        [Test(Description = "https://leetcode.com/problems/valid-anagram/")]
+        [Category("Easy")]
+        [Category("LeetCode")]
+        [Category("Valid Anagram")]
+        [TestCaseSource(nameof(Input))]
+        [Category("HashMap")]
+        [Category("TopInterview")]
+        public void Test1((bool Output, (string, string) Input) item)
+        {
+            var response = IsAnagram(item.Input.Item1, item.Input.Item2);
+            Assert.That(response, Is.EqualTo(item.Output));
+        }
+
+        public static IEnumerable<(bool Output, (string, string) Input)> Input =>
+            new List<(bool Output, (string, string) Input)>()
+            {
+
+                (true, ("anagram", "nagaram")),
+                (false, ("rat", "car")),
+            };
+    }
+}

README.md

@@ -2,7 +2,7 @@
 
 ![](https://img.shields.io/badge/Neovim-57A143.svg?logo=Neovim&logoColor=white)
 ![](https://img.shields.io/badge/Visual_Studio_Code-0078D4?logo=visual%20studio%20code&logoColor=white)
-![](https://img.shields.io/badge/Progress-26%2F150-0078D4)
+![](https://img.shields.io/badge/Progress-27%2F150-0078D4)
 
 This repository contains solutions to the Leetcode Top Interview 150 problems.
 
@@ -89,7 +89,7 @@ The Top Interview 150 collection on Leetcode is a curated set of 150 interview q
 | 39                                           |  Ransom Note                                             | Easy       |   ✅     |
 | 40                                           |  Isomorphic Strings                                      | Easy       |   ✅      |
 | 41                                           |  Word Pattern                                            | Easy       |        |
-| 42                                           |  Valid Anagram                                           | Easy       |        |
+| 42                                           |  Valid Anagram                                           | Easy       |   ✅     |
 | 43                                           |  Group Anagrams                                          | Medium     |        |
 | 44                                           |  Two Sum                                                 | Easy       |        |
 | 45                                           |  Happy Number                                            | Easy       |        |