DDSA Solutions

3147. Taking Maximum Energy From the Mystic Dungeon

UnknownView on LeetCode
ArrayDynamic Programming
Time: O(n)
Space: O(1)

Problem Overview

Taking Maximum Energy From the Mystic Dungeon (Unknown) asks you to solve a structured algorithmic task. This is a common Array / Dynamic Programming pattern in coding interviews. Scan from end; for each chain anchor collect every k-th element's energy backward.

A full step-by-step explanation is being added. See the study guide for pattern-based practice.

Approach

Scan from end; for each chain anchor collect every k-th element's energy backward.

Related patterns: Array, Dynamic Programming

3147.cs
C#
// Approach: Scan from end; for each chain anchor collect every k-th element's energy backward.
// Time: O(n) Space: O(1)

public class Solution
{
    public int MaximumEnergy(int[] energy, int k)
    {
        int[] dp = (int[])energy.Clone();
        for (int i = energy.Length - 1 - k; i >= 0; --i)
            dp[i] += dp[i + k];
        return dp.Max();
    }
}
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