Can Make Arithmetic Progression From Sequence
给一个数组, 问他重新排序后, 是不是一个等差数列.
直接排序下就可以
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class Solution { public boolean canMakeArithmeticProgression(int[] arr) { Arrays.sort(arr); boolean res = true; int diff = arr[0] - arr[1]; for(int i = 1; i < arr.length - 1; i++) { if(arr[i] - arr[i + 1] != diff) res = false; } return res; } } |