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-rw-r--r--other/valid_sudoku.cpp38
1 files changed, 38 insertions, 0 deletions
diff --git a/other/valid_sudoku.cpp b/other/valid_sudoku.cpp
new file mode 100644
index 0000000..0843d67
--- /dev/null
+++ b/other/valid_sudoku.cpp
@@ -0,0 +1,38 @@
+#include "leetcode.h"
+#include <vector>
+
+class Solution {
+public:
+ bool isValidSudoku(vvd(char) & board) {
+ vector<set<char>> rows(9), cols(9), blck(9);
+ for (int i = 0; i < 9; i++)
+ for (int j = 0; j < 9; j++)
+ if (board[i][j] != '.') {
+ int m = board[i][j], n = (i / 3) * 3 + j / 3;
+ if (!rows[i].emplace(m).second) // rows
+ return false;
+ if (!cols[j].emplace(m).second) // columns
+ return false;
+ if (!blck[n].emplace(m).second) // blocks
+ return false;
+ }
+ return true;
+ }
+};
+
+int main() {
+ Solution obj;
+ vvd(char) board = {{'8', '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'}};
+ if (obj.isValidSudoku(board))
+ cout << "true";
+ else
+ cout << "false";
+}