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题目

        给你一个已经 排好序 的整数数组  和整数  、  、  。对于数组中的每一个元素  ，计算函数值 ，请 按升序返回数组 。

解题

 在时间复杂度为解决问题

def sortTransformedArray(nums, a, b, c):def f(x):return a * x * x + b * x + cn = len(nums)result = [0] * nleft, right = 0, n - 1index = n - 1 if a >= 0 else 0while left <= right:left_val = f(nums[left])right_val = f(nums[right])if a >= 0:if left_val > right_val:result[index] = left_valleft += 1else:result[index] = right_valright -= 1index -= 1else:if left_val < right_val:result[index] = left_valleft += 1else:result[index] = right_valright -= 1index += 1return resultnums = [-4, -2, 2, 4]
a, b, c = 1, 3, 5
print(sortTransformedArray(nums, a, b, c))nums = [-4, -2, 2, 4]
a, b, c = -1, 3, 5
print(sortTransformedArray(nums, a, b, c))

[3, 9, 15, 33]
[-23, -5, 1, 7]