Package g0901_1000.s0957_prison_cells_after_n_days

Class Solution

java.lang.Object

g0901_1000.s0957_prison_cells_after_n_days.Solution

public class Solution
extends Object

957 - Prison Cells After N Days.<p>Medium</p> <p>There are <code>8</code> prison cells in a row and each cell is either occupied or vacant.</p> <p>Each day, whether the cell is occupied or vacant changes according to the following rules:</p> <ul> <li>If a cell has two adjacent neighbors that are both occupied or both vacant, then the cell becomes occupied.</li> <li>Otherwise, it becomes vacant.</li> </ul> <p><strong>Note</strong> that because the prison is a row, the first and the last cells in the row can&rsquo;t have two adjacent neighbors.</p> <p>You are given an integer array <code>cells</code> where <code>cells[i] == 1</code> if the <code>i^th</code> cell is occupied and <code>cells[i] == 0</code> if the <code>i^th</code> cell is vacant, and you are given an integer <code>n</code>.</p> <p>Return the state of the prison after <code>n</code> days (i.e., <code>n</code> such changes described above).</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> cells = [0,1,0,1,1,0,0,1], n = 7</p> <p><strong>Output:</strong> [0,0,1,1,0,0,0,0]</p> <p><strong>Explanation:</strong> The following table summarizes the state of the prison on each day:</p> <p>Day 0: [0, 1, 0, 1, 1, 0, 0, 1]</p> <p>Day 1: [0, 1, 1, 0, 0, 0, 0, 0]</p> <p>Day 2: [0, 0, 0, 0, 1, 1, 1, 0]</p> <p>Day 3: [0, 1, 1, 0, 0, 1, 0, 0]</p> <p>Day 4: [0, 0, 0, 0, 0, 1, 0, 0]</p> <p>Day 5: [0, 1, 1, 1, 0, 1, 0, 0]</p> <p>Day 6: [0, 0, 1, 0, 1, 1, 0, 0]</p> <p>Day 7: [0, 0, 1, 1, 0, 0, 0, 0]</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> cells = [1,0,0,1,0,0,1,0], n = 1000000000</p> <p><strong>Output:</strong> [0,0,1,1,1,1,1,0]</p> <p><strong>Constraints:</strong></p> <ul> <li><code>cells.length == 8</code></li> <li><code>cells[i]</code> is either <code>0</code> or <code>1</code>.</li> <li><code>1 <= n <= 10⁹</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[]	prisonAfterNDays(int[] cells, int n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

prisonAfterNDays

public int[] prisonAfterNDays(int[] cells,
 int n)