https://pastebin.com/KfMbPyd1
https://ide.geeksforgeeks.org/67b157d3-9d42-42cb-ab57-3a5cd7450151
https://paiza.io/projects/7yiI22fpJz9Da3da3tMQQw?language=php
http://cpp.sh/6viad
https://pastebin.com/NcJxwvnE
https://ide.geeksforgeeks.org/46edcc23-ef9b-48d8-a0b1-f921edaec5c9