Package g0001_0100.s0052_n_queens_ii

Class Solution

java.lang.Object

g0001_0100.s0052_n_queens_ii.Solution

public class Solution
extends Object

52 - N-Queens II.<p>Hard</p> <p>The <strong>n-queens</strong> puzzle is the problem of placing <code>n</code> queens on an <code>n x n</code> chessboard such that no two queens attack each other.</p> <p>Given an integer <code>n</code>, return <em>the number of distinct solutions to the <strong>n-queens puzzle</strong></em>.</p> <p><strong>Example 1:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2020/11/13/queens.jpg" alt="" /></p> <p><strong>Input:</strong> n = 4</p> <p><strong>Output:</strong> 2</p> <p><strong>Explanation:</strong> There are two distinct solutions to the 4-queens puzzle as shown.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> n = 1</p> <p><strong>Output:</strong> 1</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= n <= 9</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	totalNQueens(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

totalNQueens

public int totalNQueens(int n)