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authorjack <[email protected]>2024-06-14 13:13:15 -0600
committerjack <[email protected]>2024-06-14 13:13:15 -0600
commitd343a3b18dbaca9297d4f7b2280c4a16f0a5c8aa (patch)
tree96df922dae2a5073d9a50ea70c7aae6aa37e3ebe /valid_sudoku.rs
downloadleetcode-d343a3b18dbaca9297d4f7b2280c4a16f0a5c8aa.tar.gz
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initial
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-rw-r--r--valid_sudoku.rs27
1 files changed, 27 insertions, 0 deletions
diff --git a/valid_sudoku.rs b/valid_sudoku.rs
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+struct Solution;
+
+impl Solution {
+ pub fn is_valid_sudoku(board: Vec<Vec<char>>) -> bool {
+ let mut rows: [u16; 9] = [0; 9];
+ let mut cols: [u16; 9] = [0; 9];
+ let mut blck: [u16; 9] = [0; 9];
+ for i in 0..9 {
+ for j in 0..9 {
+ match board[i][j] {
+ '.' => continue,
+ c => {
+ let b: usize = (i / 3) * 3 + (j / 3);
+ let curr = 1 << (c.to_digit(10).unwrap());
+ if rows[i] & curr != 0 || cols[j] & curr != 0 || blck[b] & curr != 0 {
+ return false;
+ }
+ rows[i] |= curr;
+ cols[j] |= curr;
+ blck[b] |= curr;
+ }
+ }
+ }
+ }
+ true
+ }
+}