We can do this by adding a boolean dirty flag to each node. If it’s set to true, then this is a node that needs to be recalculated. Otherwise, it’s up-to-date. Let’s start with these flags all set to false — we have an up-to-date tree. Now, when we update the input node, we can iterate over all the children of that node, and follow a simple algorithm:
Пьяный чиновник из крупного города покусал мужчину в туалете и забыл об этом20:49
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SHA512 (FreeBSD-14.4-RELEASE-amd64-bootonly.iso) = 331b01eb44f96deb5882d28f2711f3cb455b8a51536df6f5209bae4c4d298fc53136427b5c4d802c84b129fcc43706eb4b11a318bd2aa4cc2ea8146c0e4d6f4a
Cap on average dual-fuel bill is to be reduced by 7% to £1,641 a year, but the saving is less than the chancellor promised