LeetCode 3075: Maximize Happiness of Selected Children Solution
Master LeetCode problem 3075 (Maximize Happiness of Selected Children), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
Problem Explanation
Explanation:
To maximize the sum of happiness values of selected children, we want to select the children with the highest happiness values in each turn. We can achieve this by sorting the happiness array in descending order and then selecting the k children with the highest happiness values.
Algorithm:
- Sort the
happinessarray in descending order. - Initialize a variable
totalHappinessto 0. - Iterate through the first k elements of the sorted array and add their values to
totalHappiness. - Return the
totalHappiness.
Time Complexity:
The time complexity of this algorithm is O(n log n) due to the sorting step.
Space Complexity:
The space complexity is O(n) for storing the sorted array. :
Solution Code
import java.util.Arrays;
class Solution {
public int maximizeHappiness(int[] happiness, int k) {
Arrays.sort(happiness);
int totalHappiness = 0;
for (int i = happiness.length - 1; i >= Math.max(0, happiness.length - k); i--) {
totalHappiness += happiness[i];
}
return totalHappiness;
}
}Try It Yourself
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