Last updated on July 18th, 2024 at 10:43 pm
Here, We see Rotate Function LeetCode Solution. This Leetcode problem is done in many programming languages like C++, Java, JavaScript, Python, etc. with different approaches.
List of all LeetCode Solution
Topics
Math
Companies
Amazon
Level of Question
Medium
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Rotate Function LeetCode Solution
Table of Contents
Problem Statement
You are given an integer array nums
of length n
.
Assume arrk
to be an array obtained by rotating nums
by k
positions clock-wise. We define the rotation function F
on nums
as follow:
F(k) = 0 * arrk[0] + 1 * arrk[1] + ... + (n - 1) * arrk[n - 1].
Return the maximum value of F(0), F(1), ..., F(n-1)
.
The test cases are generated so that the answer fits in a 32-bit integer.
Example 1:
Input: nums = [4,3,2,6]
Output: 26
Explanation:
F(0) = (0 * 4) + (1 * 3) + (2 * 2) + (3 * 6) = 0 + 3 + 4 + 18 = 25
F(1) = (0 * 6) + (1 * 4) + (2 * 3) + (3 * 2) = 0 + 4 + 6 + 6 = 16
F(2) = (0 * 2) + (1 * 6) + (2 * 4) + (3 * 3) = 0 + 6 + 8 + 9 = 23
F(3) = (0 * 3) + (1 * 2) + (2 * 6) + (3 * 4) = 0 + 2 + 12 + 12 = 26. So the maximum value of F(0), F(1), F(2), F(3) is F(3) = 26.
Example 2:
Input: nums = [100]
Output: 0
1. Rotate Function LeetCode Solution C++
class Solution { public: int maxRotateFunction(vector<int>& nums) { int sum =0; int f=0; for(int i=0;i<nums.size();i++){ sum+=nums[i]; f+=i*nums[i]; } int globalSum = f; for(int i=nums.size()-1;i>0;i--){ f = f + sum -nums.size()*nums[i]; globalSum = max(f,globalSum); } return globalSum; } };
2. Rotate Function LeetCode Solution Java
class Solution { public int maxRotateFunction(int[] nums) { if (nums == null || nums.length == 0) return 0; int sum = 0, F0 = 0, max = Integer.MIN_VALUE; for (int i = 0; i < nums.length; i++) { sum += nums [i]; F0 += i * nums [i]; } int dp [] = new int [nums.length]; dp [0] = F0; max = dp [0]; for (int i = 1; i < nums.length; i++) { dp [i] = dp [i-1] + sum - nums.length * nums [nums.length - i]; max = Math.max (max, dp [i]); } return max; } }
3. Rotate Function Solution JavaScript
var maxRotateFunction = function(nums) { const n = nums.length; let totalSum = 0; let perRoundSum = 0; for (let i = 0; i < n; i++) { totalSum += nums[i]; perRoundSum += i * nums[i]; } let answer = perRoundSum; for (let i = 1; i < n; i++) { const rotatedNum = nums[n - i]; perRoundSum = perRoundSum - (rotatedNum * (n - 1)) + (totalSum - rotatedNum); answer = Math.max(answer, perRoundSum); } return answer; };
4. Rotate Function Solution Python
class Solution(object): def maxRotateFunction(self, nums): F = 0 S = 0 for i in range(len(nums)): F = F + (nums[i] * i) S = S + nums[i] max_val = F n = len(nums) for i in range(n - 1, 0, -1): F = F + S - n * nums[i] max_val = max(max_val, F) return max_val