Detect a cycle in a linked list

Detect a cycle in a linked list

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

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参考答案摘要

We use two pointers: slow and fast. Slow moves one step, fast moves two steps. If there’s a cycle, they will meet. If fast reaches null, there’s no cycle. This uses O(1) space and is efficient. functi...

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