Commit a2e844d

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added daily challenge

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+17

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Lines changed: 17 additions & 0 deletions

Original file line number	Diff line number	Diff line change
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	`1`	`+# Definition for singly-linked list.`
	`2`	`+# class ListNode:`
	`3`	`+# def __init__(self, val=0, next=None):`
	`4`	`+# self.val = val`
	`5`	`+# self.next = next`
	`6`	`+class Solution:`
	`7`	`+ def reverseList(self, head: Optional[ListNode]) -> Optional[ListNode]:`
	`8`	`+ prev_node = None`
	`9`	`+ current_node = head`
	`10`	`+`
	`11`	`+ while current_node is not None:`
	`12`	`+ next_node = current_node.next`
	`13`	`+ current_node.next = prev_node`
	`14`	`+ prev_node = current_node`
	`15`	`+ current_node = next_node`
	`16`	`+`
	`17`	`+ return prev_node`

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