LeetCode 2679: Sum in a Matrix
LeetCode 2679 Solution Explanation
Explanation
To solve this problem, we need to iterate over each row in the matrix, find the maximum value in that row, remove it, and keep track of the maximum value found so far. We continue this process until all elements are removed from the matrix. The sum of all the maximum values found will be our final score.
Algorithm:
- Initialize a variable
scoreto 0. - While the matrix is not empty:
- Iterate over each row and find the maximum value in that row.
- Remove the maximum value from each row.
- Update the
scoreby adding the maximum value found.
- Return the
score.
Time Complexity:
The time complexity of this algorithm is O(n * m), where n is the number of rows and m is the number of columns in the matrix.
Space Complexity:
The space complexity of this algorithm is O(1) as we are not using any extra space apart from a few variables.
LeetCode 2679 Solutions in Java, C++, Python
class Solution {
public int matrixScore(int[][] nums) {
int score = 0;
while (nums.length > 0) {
int maxVal = Integer.MIN_VALUE;
for (int i = 0; i < nums.length; i++) {
int rowMax = Arrays.stream(nums[i]).max().getAsInt();
maxVal = Math.max(maxVal, rowMax);
nums[i] = Arrays.stream(nums[i]).filter(num -> num != rowMax).toArray();
if (nums[i].length == 0) {
nums = ArrayUtils.remove(nums, i);
i--;
}
}
score += maxVal;
}
return score;
}
}Interactive Code Editor for LeetCode 2679
Improve Your LeetCode 2679 Solution
Use the editor below to refine the provided solution for LeetCode 2679. Select a programming language and try the following:
- Add import statements if required.
- Optimize the code for better time or space complexity.
- Add test cases to validate edge cases and common scenarios.
- Handle error conditions or invalid inputs gracefully.
- Experiment with alternative approaches to deepen your understanding.
Click "Run Code" to execute your solution and view the output. If errors occur, check the line numbers and debug accordingly. Resize the editor by dragging its bottom edge.
Loading editor...