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Problems Linked List

Linked List Cycle

Easy

3/3

EasyLinked ListLeetCode #141

Linked List Cycle

Floyd: slow +1, fast +2. Meet ⇒ cycle.

Examples

Example 1

Input

4 1
3 2 0 -4

Output

true

Example 2

Input

2 -1
1 2

Output

false

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