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Solve all below question Question 1 Given the head of a linked list, reverse the nodes of the list k at a time, and return
Solve all below question
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Given the head of a linked list, reverse the nodes of the list k at a time, and return the modified list.
k is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a multiple of k then leftout nodes, in the end, should remain as it is
You may not alter the values in the list's nodes, only nodes themselves may be changed.
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What is the Chomsky hierarchy?
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Given a string s return whether s is a valid number.
An integer number followed by an optional exponent.
A decimal number followed by an optional exponent.
The digits are defined as one or more digits.
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What is an oracle machine
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