#include "stdio.h" int tree_count(char[323][31], int, int); int main() { char lines[323][31]; int i = 0; while (scanf("%s", lines[i++]) == 1) ; long product = 1; product *= tree_count(lines, 3, 1); printf("Answer 1: %ld\n", product); product *= tree_count(lines, 1, 1); product *= tree_count(lines, 5, 1); product *= tree_count(lines, 7, 1); product *= tree_count(lines, 1, 2); printf("Answer 2: %ld\n", product); } int tree_count(char lines[323][31], int x_inc, int y_inc) { int x = 0, y = 0; int trees = 0; while (y < 323) { if (lines[y][x] == '#') trees++; y += y_inc; x += x_inc; x %= 31; } return trees; }