Leetcode 1502. Can Make Arithmetic Progression From Sequence
A sequence of numbers is called an?arithmetic progression?if the difference between any two consecutive elements is the same.
Given an array of numbers?arr, return?true?if the array can be rearranged to form an?arithmetic progression. Otherwise, return?false.
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Example 1:
Input: arr = [3,5,1]
Output: trueExplanation: We can reorder the elements as [1,3,5] or [5,3,1] with differences 2 and -2 respectively, between each consecutive elements.
Example 2:
Input: arr = [1,2,4]
Output: falseExplanation: There is no way to reorder the elements to obtain an arithmetic progression.
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Constraints:
2 <= arr.length <= 1000-106?<= arr[i] <= 106
就是之前在學校學習的等差數(shù)列。
Runtime:?1 ms, faster than?99.05%?of?Java?online submissions for?Can Make Arithmetic Progression From Sequence.
Memory Usage:?42.2 MB, less than?18.88%?of?Java?online submissions for?Can Make Arithmetic Progression From Sequence.
