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LeetCode977.Squares of a Sorted Array

2019年05月10日  | 移动技术网IT编程  | 我要评论

题目

977. squares of a sorted array

given an array of integers a sorted in non-decreasing order, return an array of the squares of each number, also in sorted non-decreasing order.

example 1:

input: [-4,-1,0,3,10]
output: [0,1,9,16,100]

example 2:

input: [-7,-3,2,3,11]
output: [4,9,9,49,121]

note:

  • 1 <= a.length <= 10000
  • -10000 <= a[i] <= 10000
  • a is sorted in non-decreasing order.

答案

func sortedsquares(a []int) []int {
    size := len(a)
    res := make([]int, size)
    for l, r, i := 0, size-1, size-1; l <= r; i-- {
        if a[l]+a[r] < 0 {
            res[i] = a[l] * a[l]
            l++
        } else {
            res[i] = a[r] * a[r]
            r--
        }
    }
    return res
}

参考链接

977. squares of a sorted array

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