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Update0051.N皇后,添加C#
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@ -865,6 +865,60 @@ object Solution {
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}
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}
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```
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### C#
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```csharp
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public class Solution
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{
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public List<IList<string>> res = new();
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public IList<IList<string>> SolveNQueens(int n)
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{
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char[][] chessBoard = new char[n][];
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for (int i = 0; i < n; i++)
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{
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chessBoard[i] = new char[n];
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for (int j = 0; j < n; j++)
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{
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chessBoard[i][j] = '.';
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}
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}
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BackTracking(n, 0, chessBoard);
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return res;
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}
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public void BackTracking(int n, int row, char[][] chessBoard)
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{
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if (row == n)
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{
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res.Add(chessBoard.Select(x => new string(x)).ToList());
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return;
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}
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for (int col = 0; col < n; col++)
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{
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if (IsValid(row, col, chessBoard, n))
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{
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chessBoard[row][col] = 'Q';
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BackTracking(n, row + 1, chessBoard);
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chessBoard[row][col] = '.';
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}
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}
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}
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public bool IsValid(int row, int col, char[][] chessBoard, int n)
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{
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for (int i = 0; i < row; i++)
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{
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if (chessBoard[i][col] == 'Q') return false;
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}
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for (int i = row - 1, j = col - 1; i >= 0 && j >= 0; i--, j--)
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{
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if (chessBoard[i][j] == 'Q') return false;
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}
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for (int i = row - 1, j = col + 1; i >= 0 && j < n; i--, j++)
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{
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if (chessBoard[i][j] == 'Q') return false;
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}
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return true;
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}
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}
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```
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<p align="center">
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<a href="https://programmercarl.com/other/kstar.html" target="_blank">
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