@@ -756,6 +756,59 @@ object Solution {
756756 }
757757}
758758```
759+ ### C#
760+ ``` csharp
761+ public class Solution
762+ {
763+ public void SolveSudoku (char [][] board )
764+ {
765+ BackTracking (board );
766+ }
767+ public bool BackTracking (char [][] board )
768+ {
769+ for (int i = 0 ; i < board .Length ; i ++ )
770+ {
771+ for (int j = 0 ; j < board [0 ].Length ; j ++ )
772+ {
773+ if (board [i ][j ] != '.' ) continue ;
774+ for (char k = '1' ; k <= '9' ; k ++ )
775+ {
776+ if (IsValid (board , i , j , k ))
777+ {
778+ board [i ][j ] = k ;
779+ if (BackTracking (board )) return true ;
780+ board [i ][j ] = '.' ;
781+ }
782+ }
783+ return false ;
784+ }
785+ 786+ }
787+ return true ;
788+ }
789+ public bool IsValid (char [][] board , int row , int col , char val )
790+ {
791+ for (int i = 0 ; i < 9 ; i ++ )
792+ {
793+ if (board [i ][col ] == val ) return false ;
794+ }
795+ for (int i = 0 ; i < 9 ; i ++ )
796+ {
797+ if (board [row ][i ] == val ) return false ;
798+ }
799+ int startRow = (row / 3 ) * 3 ;
800+ int startCol = (col / 3 ) * 3 ;
801+ for (int i = startRow ; i < startRow + 3 ; i ++ )
802+ {
803+ for (int j = startCol ; j < startCol + 3 ; j ++ )
804+ {
805+ if (board [i ][j ] == val ) return false ;
806+ }
807+ }
808+ return true ;
809+ }
810+ }
811+ ```
759812
760813<p align =" center " >
761814<a href =" https://programmercarl.com/other/kstar.html " target =" _blank " >
0 commit comments