diff options
Diffstat (limited to 'count_servers_communicate.c')
-rw-r--r-- | count_servers_communicate.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/count_servers_communicate.c b/count_servers_communicate.c new file mode 100644 index 0000000..66d06be --- /dev/null +++ b/count_servers_communicate.c @@ -0,0 +1,51 @@ +// 1267. Count Servers that Communicate +#include "leetcode.h" + +/* + * you are given a map of a server centre, represented as a 'm x n' integer + * matrix 'grid', where 1 means that on that cell there is a server and 0 means + * that it is no server. two servers are said to communicate if they are on the + * same row or the same column. return the number of servers that communicate + * with any other server. + */ + +int countServers(int **grid, int gridSize, int *gridColSize) { + int rows[8] = {0}, rg2[8] = {0}; + int cols[8] = {0}, cg2[8] = {0}; + int ans = 0; + for (int i = 0; i < gridSize; i++) + for (int j = 0; j < gridColSize[i]; j++) + if (grid[i][j]) { + if ((rows[i / 32] & (1 << (i % 32))) == (1 << (i % 32))) + rg2[i / 32] |= 1 << (i % 32); + else + rows[i / 32] |= 1 << (i % 32); + if ((cols[j / 32] & (1 << (j % 32))) == (1 << (j % 32))) + cg2[j / 32] |= 1 << (j % 32); + else + cols[j / 32] |= 1 << (j % 32); + } + for (int i = 0; i < gridSize; i++) + for (int j = 0; j < gridColSize[i]; j++) + if (grid[i][j] == 1 && + (((rg2[i / 32] & (1 << (i % 32))) == (1 << (i % 32))) || + ((cg2[j / 32] & (1 << (j % 32))) == (1 << (j % 32))))) + ans++; + return ans; +} + +int main() { + int g1i[2][2] = {{1, 0}, {0, 1}}; + int g2i[2][2] = {{1, 0}, {1, 1}}; + int g3i[4][4] = {{1, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}}; + struct two_d_arr g1, g2, g3; + two_d_arr_init(&g1, ARRAY_SIZE(g1i), ARRAY_SIZE(g1i[0]), g1i); + two_d_arr_init(&g2, ARRAY_SIZE(g2i), ARRAY_SIZE(g2i[0]), g2i); + two_d_arr_init(&g3, ARRAY_SIZE(g3i), ARRAY_SIZE(g3i[0]), g3i); + printf("%d\n", countServers(g1.arr, g1.row_size, g1.col_size)); // expect: 0 + printf("%d\n", countServers(g2.arr, g2.row_size, g2.col_size)); // expect: 3 + printf("%d\n", countServers(g3.arr, g3.row_size, g3.col_size)); // expect: 4 + two_d_arr_free(&g1); + two_d_arr_free(&g2); + two_d_arr_free(&g3); +} |