diff options
Diffstat (limited to 'check_every_row_col_contain_num.c')
-rw-r--r-- | check_every_row_col_contain_num.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/check_every_row_col_contain_num.c b/check_every_row_col_contain_num.c new file mode 100644 index 0000000..9f79f34 --- /dev/null +++ b/check_every_row_col_contain_num.c @@ -0,0 +1,35 @@ +// 2133. Check if Every Row and Column Contains All Numbers +#include "leetcode.h" + +/* + * an 'n x n' matrix is valid if every row and every column contains all the + * integers from 1 to 'n'. given an 'n x n' matrix, return true if the matrix is + * valid, otherwise return false. + */ + +bool checkValid(int **matrix, int matrixSize, int *matrixColSize) { + for (int i = 0; i < matrixSize; i++) { + int row = 1, col = 1, mask = 1; + for (int j = 0; j < matrixSize; j++) { + row ^= 1 << matrix[i][j]; + col ^= 1 << matrix[j][i]; + mask |= 1 << (j + 1); + } + if (row ^ mask || col ^ mask) + return false; + } + return true; +} + +int main() { + int m1i[3][3] = {{1, 2, 3}, {3, 1, 2}, {2, 3, 1}}, + m2i[3][3] = {{1, 1, 1}, {1, 2, 3}, {1, 2, 3}}; + struct two_d_arr *m1 = + two_d_arr_init(ARRAY_SIZE(m1i), ARRAY_SIZE(m1i[0]), m1i); + struct two_d_arr *m2 = + two_d_arr_init(ARRAY_SIZE(m2i), ARRAY_SIZE(m2i[0]), m2i); + printf("%d\n", checkValid(m1->arr, m1->row_size, m1->col_size)); // expect: 1 + printf("%d\n", checkValid(m2->arr, m2->row_size, m2->col_size)); // expect: 0 + two_d_arr_free(m1); + two_d_arr_free(m2); +} |