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Author: kallyy7

10.Regular Expressions-REGEX/01.ExtractEmails/01.ExtractEmails.csproj

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+using System;
+using System.Text.RegularExpressions;
+
+public class ExtractEmails
+{
+    public static void Main()
+    {
+        string input = Console.ReadLine();
+
+        string pattern = @"\b(?<!\S)[a-z][a-z0-9\.\-_]+[a-z0-9]*@[a-z][a-z\-]+\.[a-z][a-z\.]+[a-z]?\b";
+        var matches = Regex.Matches(input, pattern);
+
+        foreach (var match in matches)
+        {
+            Console.WriteLine(match);
+        }
+    }
+}

10.Regular Expressions-REGEX/01.ExtractEmails/Program.cs

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+using System;
+using System.Text.RegularExpressions;
+
+public class ExtractSentencesByKeyword
+{
+    public static void Main()
+    {
+        string input = Console.ReadLine();
+        string text = Console.ReadLine();
+        string pattern = $@"\b[^.?!]*\b{input}\b[^.?!]*";
+
+        MatchCollection matches = Regex.Matches(text, pattern);
+
+        foreach (Match match in matches)
+        {
+            Console.WriteLine(match);
+        }
+    }
+}

10.Regular Expressions-REGEX/02.ExtractSentencesByKeyword/02.ExtractSentencesByKeyword.csproj

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+using System;
+using System.Linq;
+using System.Text.RegularExpressions;
+
+public class CameraView
+{
+    public static void Main()
+    {
+        int[] input = Console.ReadLine()
+            .Split()
+            .Select(int.Parse)
+            .ToArray();
+        int skip = input[0];
+        int take = input[1];
+
+        string input2 = Console.ReadLine();
+        string pattern = @"(?<=\|<.{" + skip + "})([^|]{0," + take + "})";
+        MatchCollection words = Regex.Matches(input2, pattern);
+
+        Console.WriteLine(string.Join(", ", words));
+    }
+}