TREE TRAVERSAL +========+ Time: 1 hour - 2 hours Difficulty: Medium Languages: Any +========+ Given the root of a binary tree, implement functions to perform pre-order, in-order, and post-order traversal of the tree and return a list of the visited nodes. +========+ Please answer to this message with your solution :)
TREE TRAVERSAL +========+ Time: 1 hour - 2 hours Difficulty: Medium Languages: Any +========+ Given the root of a binary tree, implement functions to perform pre-order, in-order, and post-order traversal of the tree and return a list of the visited nodes. +========+ Please answer to this message with your solution :)
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Telegram auto-delete message, expiring invites, and more
elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.
To pay the bills, Mr. Durov is issuing investors $1 billion to $1.5 billion of company debt, with the promise of discounted equity if the company eventually goes public, the people briefed on the plans said. He has also announced plans to start selling ads in public Telegram channels as soon as later this year, as well as offering other premium services for businesses and users.
Programming Challenges How to be a breathtaking Programmer from no
