#2866
Beautiful Towers II
expert · 1055 · lc medium +32 · verified · 36.3% accepted · 476 likes · top 14%
Description
A 0-indexed array maxHeights of n integers is given. Build n towers at coordinates 0 through n - 1 with heights forming a mountain array:
- 1 <= heights[i] <= maxHeights[i]
- There exists an index i such that heights are non-decreasing up to i and non-increasing from i onward.
Return the maximum achievable sum of heights.
Example 1:
Input: maxHeights = [5,3,4,1,1]
Output: 13
Explanation: One beautiful configuration with a maximum sum is heights = [5,3,3,1,1]. This configuration is beautiful since:
- 1 <= heights[i] <= maxHeights[i]
- heights is a mountain of peak i = 0.
It can be shown that there exists no other beautiful configuration with a sum of heights greater than 13.
Example 2:
Input: maxHeights = [6,5,3,9,2,7]
Output: 22
Explanation: One beautiful configuration with a maximum sum is heights = [3,3,3,9,2,2]. This configuration is beautiful since:
- 1 <= heights[i] <= maxHeights[i]
- heights is a mountain of peak i = 3.
It can be shown that there exists no other beautiful configuration with a sum of heights greater than 22.
Example 3:
Input: maxHeights = [3,2,5,5,2,3]
Output: 18
Explanation: One beautiful configuration with a maximum sum is heights = [2,2,5,5,2,2]. This configuration is beautiful since:
- 1 <= heights[i] <= maxHeights[i]
- heights is a mountain of peak i = 2.
Note that, for this configuration, i = 3 can also be considered a peak.
It can be shown that there exists no other beautiful configuration with a sum of heights greater than 18.
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