LeetCode 2545: Sort the Students by Their Kth Score Solution
Master LeetCode problem 2545 (Sort the Students by Their Kth Score), 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 solve this problem, we need to sort the students based on their scores in the kth exam. We can achieve this by using a custom comparator to sort the rows of the matrix based on the kth element in each row.
- Create a custom comparator that compares rows based on the kth element.
- Sort the rows of the matrix using the custom comparator.
- Return the sorted matrix.
Time Complexity
The time complexity of this approach is O(m log m) where m is the number of students.
Space Complexity
The space complexity is O(1) as we are sorting the matrix in-place.
Solution Code
class Solution {
public int[][] sortStudentsByScore(int[][] score, int k) {
Arrays.sort(score, (a, b) -> Integer.compare(b[k], a[k]));
return score;
}
}Try It Yourself
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What is the time complexity of LeetCode 2545 (Sort the Students by Their Kth Score)?
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