Gemstones

Algorithms/Strings/Gemstones/Solution.cs

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+using System.CodeDom.Compiler;
+using System.Collections.Generic;
+using System.Collections;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Text.RegularExpressions;
+using System.Text;
+using System;
+
+class Result
+{
+
+    /*
+     * Complete the 'gemstones' function below.
+     *
+     * The function is expected to return an INTEGER.
+     * The function accepts STRING_ARRAY arr as parameter.
+     */
+
+    public static int gemstones(List<string> arr)
+    {
+        var gemsCount = arr
+            .SelectMany(rock => rock.Distinct())
+            .GroupBy(c => c)
+            .ToDictionary(group => group.Key, group => group.Count())
+            .Where(kvp => kvp.Value == arr.Count)
+            .Count();
+        return gemsCount;
+    }
+
+}
+
+class Solution
+{
+    public static void Main(string[] args)
+    {
+        TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);
+
+        int n = Convert.ToInt32(Console.ReadLine().Trim());
+
+        List<string> arr = new List<string>();
+
+        for (int i = 0; i < n; i++)
+        {
+            string arrItem = Console.ReadLine();
+            arr.Add(arrItem);
+        }
+
+        int result = Result.gemstones(arr);
+
+        textWriter.WriteLine(result);
+
+        textWriter.Flush();
+        textWriter.Close();
+    }
+}