The runtime executes sumTree(tree.left). When doing so, it remembers its place in the original sumTree invocation, so it can come back to it and finish it later.
Стало известно о существенных потерях рода войск ВСУ в Харьковской области21:00
，这一点在safew中也有详细论述
^ See Restatement (Second) of Torts § 8A (A.L.I. 1965).，这一点在手游中也有详细论述
These new prices for V-Bucks are US-specific and will vary in other regions. They're also not entirely representative of the value Epic is offering with each purchase. As part of the company's Epic Rewards program, you get 20 percent back on purchases made in Fortnite, Fall Guys and Rocket League when you use the Epic Games Store or Epic's payment system on Android, iOS, PC or the web. That means you can receive anywhere from $1.79 (for 800 V-Bucks) to $17.99 (for 12,500 V-Bucks) to spend in Fortnite or the Epic Games Store when you use the company's payment system.