public static void Main(string[] args) { SlidingWindow slidingWindowExample = new SlidingWindow(); Console.WriteLine(slidingWindowExample.LongestSubstring("pwwkew")); Console.WriteLine(slidingWindowExample.LongestSubstring("abcabcbb")); Console.WriteLine(slidingWindowExample.LongestSubstring("bbbbb")); // Output // 3 // 3 // 1 }