मान लीजिए कि हमारे पास एक 9x9 सुडोकू बोर्ड है। हमें यह देखना होगा कि यह वैध है या अभी। केवल भरे हुए कक्षों को निम्नलिखित नियमों के अनुसार सत्यापित करने की आवश्यकता है -
- प्रत्येक पंक्ति में बिना दोहराव के 1-9 के अंक होने चाहिए।
- प्रत्येक कॉलम में बिना दोहराव के 1-9 के अंक होने चाहिए।
- ग्रिड के 9 (3x3) सब-बॉक्स में से प्रत्येक में बिना दोहराव के 1-9 के अंक होने चाहिए।
मान लीजिए सुडोकू ग्रिड इस तरह है -
5 | 3 | | | 7 | | | | |
6 | | | 1 | 9 | 5 | | | |
| 9 | 8 | | | | | 6 | |
8 | | | | 6 | | | | 3 |
4 | | | 8 | | 3 | | | 1 |
7 | | | 2 | | | | | 6 |
| 6 | | | | | 2 | 8 | |
| | | 4 | 1 | 9 | | | 5 |
| | | | 8 | | | 7 | 9 |
यह मान्य है।
इसे हल करने के लिए, हम इन चरणों का पालन करेंगे -
- मेरे लिए 0 से 8 की सीमा में
- पंक्ति, कॉल और ब्लॉक नामक कुछ खाली शब्दकोश बनाएं, row_cube:=3 * (i / 3), और col_cube:=3 * (i mod 3)
- जे के लिए 0 से 8 की सीमा में
- यदि बोर्ड [i, j] खाली नहीं है और बोर्ड [i, j] पंक्ति में है, तो झूठी वापसी करें
- पंक्ति[बोर्ड[i, j]] :=1
- अगर बोर्ड [जे, आई] खाली नहीं है और बोर्ड [जे, आई] कॉलम में है, तो झूठी वापसी करें
- col[board[j, i]] :=1
- rc :=row_cube + j/3 और cc :=col_cube + j mod 3
- अगर ब्लॉक और बोर्ड में बोर्ड [आरसी, सीसी] [आरसी, सीसी] खाली नहीं है, तो झूठी वापसी करें
- ब्लॉक[बोर्ड[आरसी, सीसी]] :=1
- सही लौटें
उदाहरण (पायथन)
बेहतर समझ प्राप्त करने के लिए आइए निम्नलिखित कार्यान्वयन को देखें -
class Solution(object): def isValidSudoku(self, board): """ :type board: List[List[str]] :rtype: bool """ for i in range(9): row = {} column = {} block = {} row_cube = 3 * (i//3) column_cube = 3 * (i%3) for j in range(9): if board[i][j]!='.' and board[i][j] in row: return False row[board[i][j]] = 1 if board[j][i]!='.' and board[j][i] in column: return False column[board[j][i]] = 1 rc= row_cube+j//3 cc = column_cube + j%3 if board[rc][cc] in block and board[rc][cc]!='.': return False block[board[rc][cc]]=1 return True ob1 = Solution() print(ob1.isValidSudoku([ ["5","3",".",".","7",".",".",".","."], ["6",".",".","1","9","5",".",".","."], [".","9","8",".",".",".",".","6","."], ["8",".",".",".","6",".",".",".","3"], ["4",".",".","8",".","3",".",".","1"], ["7",".",".",".","2",".",".",".","6"], [".","6",".",".",".",".","2","8","."], [".",".",".","4","1","9",".",".","5"], [".",".",".",".","8",".",".","7","9"]]))
इनपुट
[["5","3",".",".","7",".",".",".","."],["6",".",".","1","9","5",".",".","."],[".","9","8",".",".",".",".","6","."],["8",".",".",".","6",".",".",".","3"],["4",".",".","8",".","3",".",".","1"],["7",".",".",".","2",".",".",".","6"],[".","6",".",".",".",".","2","8","."],[".",".",".","4","1","9",".",".","5"],[".",".",".",".","8",".",".","7","9"]]
आउटपुट
true