[LeetCode] 896. Monotonic Array 单调数组

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An array is?monotonic?if it is either monotone increasing or monotone decreasing.

An array?A?is monotone increasing if for all?i <= j,?A[i] <= A[j].? An array?A?is monotone decreasing if for all?i <= j,?A[i] >= A[j].

Return?true?if and only if the given array?A?is monotonic.

Example 1:

Input: [1,2,2,3]
Output: true

Example 2:

Input: [6,5,4,4]
Output: true

Example 3:

Input: [1,3,2]
Output: false

Example 4:

Input: [1,2,4,5]
Output: true

Example 5:

Input: [1,1,1]
Output: true

Note:

  1. 1 <= A.length <= 50000
  2. -100000 <= A[i] <= 100000



Github 同步地址:

https://github.com/grandyang/leetcode/issues/896



参考资料:

https://leetcode.com/problems/monotonic-array/



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