// 73. Set Matrix Zeroes #include "leetcode.h" /* * given an 'm x n' integer 'matrix', if an element is '0', set its entire row * and columns to '0's. you must do it in place */ void setZeroes(int **matrix, int matrixSize, int *matrixColSize) { bool *r = (bool *)calloc(matrixSize, sizeof(bool)); bool *c = (bool *)calloc(*matrixColSize, sizeof(bool)); for (int i = 0; i < matrixSize; ++i) for (int j = 0; j < *matrixColSize; ++j) if (!matrix[i][j]) { r[i] = true; r[j] = true; } for (int i = 0; i < matrixSize; ++i) for (int j = 0; j < *matrixColSize; ++j) if (r[i] || c[j]) matrix[i][j] = 0; } int main() { int m1i[3][3] = {{1, 1, 1}, {1, 0, 1}, {1, 1, 1}}, m2i[3][4] = {{0, 1, 2, 0}, {3, 4, 5, 2}, {1, 3, 1, 5}}; struct two_d_arr m1, m2; two_d_arr_init(&m1, ARRAY_SIZE(m1i), ARRAY_SIZE(m1i[0]), m1i); two_d_arr_init(&m2, ARRAY_SIZE(m2i), ARRAY_SIZE(m2i[0]), m2i); setZeroes(m1.arr, m1.row_size, m1.col_size); setZeroes(m2.arr, m2.row_size, m2.col_size); for (int i = 0; i < m1.row_size; i++) { for (int j = 0; j < m1.col_size[i]; j++) printf("%d ", m1i[i][j]); // expect: [[1,0,1],[0,0,0],[1,0,1]] printf("\n"); } for (int i = 0; i < m2.row_size; i++) { for (int j = 0; j < m2.col_size[i]; j++) printf("%d ", m2i[i][j]); // expect: [[0,0,0,0],[0,4,5,0],[0,3,1,0]] printf("\n"); } two_d_arr_free(&m1); two_d_arr_free(&m2); }