LeetCode 749: Contain Virus Solution
Master LeetCode problem 749 (Contain Virus), a hard 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.
749. Contain Virus
Problem Explanation
Explanation:
To solve this problem, we need to iteratively identify the regions of infected cells, quarantine the region that has the potential to infect the most uninfected cells, and install walls to prevent the spread of the virus.
- Identify all infected regions using DFS and mark the perimeter cells.
- Calculate the potential threat of each region by counting the number of uninfected cells adjacent to the perimeter.
- Quarantine the region with the highest threat by installing walls and update the grid.
- Repeat steps 1-3 until all regions are quarantined or the entire grid is infected.
Time Complexity: O(m * n * (m + n)) where m is the number of rows and n is the number of columns in the grid.
Space Complexity: O(m * n) for the visited array.
:
Solution Code
class Solution {
public int containVirus(int[][] isInfected) {
// Java solution here
}
}Try It Yourself
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