package com.fishercoder.solutions;

/**
 * 749. Contain Virus
 *
 * A virus is spreading rapidly, and your task is to quarantine the infected area by installing walls.
 * The world is modeled as a 2-D array of cells, where 0 represents uninfected cells,
 * and 1 represents cells contaminated with the virus.
 * A wall (and only one wall) can be installed between any two 4-directionally adjacent cells, on the shared boundary.
 * Every night, the virus spreads to all neighboring cells in all four directions unless blocked by a wall.
 * Resources are limited. Each day, you can install walls around only one region --
 * the affected area (continuous block of infected cells) that threatens the most uninfected cells the following night. There will never be a tie.
 * Can you save the day? If so, what is the number of walls required? If not, and the world becomes fully infected, return the number of walls used.

 Example 1:
 Input: grid =
 [[0,1,0,0,0,0,0,1],
 [0,1,0,0,0,0,0,1],
 [0,0,0,0,0,0,0,1],
 [0,0,0,0,0,0,0,0]]

 Output: 10
 Explanation:
 There are 2 contaminated regions.
 On the first day, add 5 walls to quarantine the viral region on the left. The board after the virus spreads is:

 [[0,1,0,0,0,0,1,1],
 [0,1,0,0,0,0,1,1],
 [0,0,0,0,0,0,1,1],
 [0,0,0,0,0,0,0,1]]

 On the second day, add 5 walls to quarantine the viral region on the right. The virus is fully contained.


 Example 2:
 Input: grid =
 [[1,1,1],
 [1,0,1],
 [1,1,1]]

 Output: 4
 Explanation: Even though there is only one cell saved, there are 4 walls built.
 Notice that walls are only built on the shared boundary of two different cells.


 Example 3:
 Input: grid =
 [[1,1,1,0,0,0,0,0,0],
 [1,0,1,0,1,1,1,1,1],
 [1,1,1,0,0,0,0,0,0]]
 Output: 13
 Explanation: The region on the left only builds two new walls.
 Note:
 The number of rows and columns of grid will each be in the range [1, 50].
 Each grid[i][j] will be either 0 or 1.
 Throughout the described process, there is always a contiguous viral region that will infect strictly more uncontaminated squares in the next round.
 */
public class _749 {
  public int containVirus(int[][] grid) {
    return -1;
  }
}

add 749 skeleton