#include #include #include struct Grid { int h, w; char c[128][128]; }; static char at(const struct Grid *grid, int y, int x) { if (x < 0 || y < 0 || x >= grid->w || y >= grid->h) return '.'; return grid->c[y][x]; } static int adj(const struct Grid *grid, int y, int x) { return ( (at(grid, y - 1, x - 1) == '#') + (at(grid, y - 1, x + 0) == '#') + (at(grid, y - 1, x + 1) == '#') + (at(grid, y + 0, x - 1) == '#') + (at(grid, y + 0, x + 1) == '#') + (at(grid, y + 1, x - 1) == '#') + (at(grid, y + 1, x + 0) == '#') + (at(grid, y + 1, x + 1) == '#') ); } static struct Grid gen1(const struct Grid *prev) { struct Grid next = { .h = prev->h, .w = prev->w }; for (int y = 0; y < next.h; ++y) { for (int x = 0; x < next.w; ++x) { if (prev->c[y][x] == 'L' && !adj(prev, y, x)) { next.c[y][x] = '#'; } else if (prev->c[y][x] == '#' && adj(prev, y, x) >= 4) { next.c[y][x] = 'L'; } else { next.c[y][x] = prev->c[y][x]; } } } return next; } static char ray(const struct Grid *grid, int y, int x, int dy, int dx) { y += dy; x += dx; while (y >= 0 && y < grid->h && x >= 0 && x < grid->w) { if (grid->c[y][x] != '.') return grid->c[y][x]; y += dy; x += dx; } return '.'; } static int see(const struct Grid *grid, int y, int x) { return ( (ray(grid, y, x, -1, -1) == '#') + (ray(grid, y, x, -1, +0) == '#') + (ray(grid, y, x, -1, +1) == '#') + (ray(grid, y, x, +0, -1) == '#') + (ray(grid, y, x, +0, +1) == '#') + (ray(grid, y, x, +1, -1) == '#') + (ray(grid, y, x, +1, +0) == '#') + (ray(grid, y, x, +1, +1) == '#') ); } static struct Grid gen2(const struct Grid *prev) { struct Grid next = { .h = prev->h, .w = prev->w }; for (int y = 0; y < next.h; ++y) { for (int x = 0; x < next.w; ++x) { if (prev->c[y][x] == 'L' && !see(prev, y, x)) { next.c[y][x] = '#'; } else if (prev->c[y][x] == '#' && see(prev, y, x) >= 5) { next.c[y][x] = 'L'; } else { next.c[y][x] = prev->c[y][x]; } } } return next; } int main(void) { struct Grid init = {0}; while (EOF != scanf("%s\n", init.c[init.h])) { init.h++; } init.w = strlen(init.c[0]); struct Grid prev = init; for (;;) { struct Grid next = gen1(&prev); if (!memcmp(&next, &prev, sizeof(next))) break; prev = next; } int occ = 0; for (int y = 0; y < prev.h; ++y) { for (int x = 0; x < prev.w; ++x) { occ += prev.c[y][x] == '#'; } } printf("%d\n", occ); prev = init; for (;;) { struct Grid next = gen2(&prev); if (!memcmp(&next, &prev, sizeof(next))) break; prev = next; } occ = 0; for (int y = 0; y < prev.h; ++y) { for (int x = 0; x < prev.w; ++x) { occ += prev.c[y][x] == '#'; } } printf("%d\n", occ); }