2021, day2: done

1 files changed, 11 insertions, 1 deletions

diff --git a/2021/day2/pilot.c b/2021/day2/pilot.c
index 4268cc7..6bc0630 100644
--- a/2021/day2/pilot.c
+++ b/2021/day2/pilot.c
@@ -22,13 +22,23 @@ int main(int argc, char *argv[])
 
         int scalar;
         char *way;
+        int h_pos = 0, depth = 0, aim = 0;
         while ((read = getline(&buffer, &len, fp)) != -1) {
                 sscanf(buffer, "%s %d", way, &scalar);
                 // printf("READ: <%s>, <%d>\n", way, scalar);
 
-                if (strncmp(buffer, "forward", strlen(buffer))) {
+                if (strncmp(way, "forward", strlen("forward")) == 0) {
+                        // printf("GOING FORWARD\n");
+                        h_pos += scalar;
+                        depth += aim * scalar;
+                } else if (strncmp(way, "down", strlen("forward")) == 0) {
+                        aim += scalar;
+                } else { /* up */
+                        aim -= scalar;
                 }
         }
 
+        printf("%d\n", depth * h_pos);
+
         return 0;
 }