2024-06,07

src/2024/06.c

@@ -1,10 +1,110 @@
+#include <advent_utility.h>
+#include <lfutility.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 #include "lfinput.h"
 
-void advent2024day06(void) {
+#define TRAVELED 'X'
-  char *input = get_input("input/2024/06");
+#define BLOCK '#'
-  printf("Solution for Day 06 of 2024 is not completed yet\n");
+
-  free(input);
+static int sim(Point guard, char **map, const size_t width, const size_t height) {
+    enum Direction dir = DIR_NORTH;
+    while (guard.x > 0 && guard.y > 0 && guard.x < width && guard.y < height) {
+        map[guard.y][guard.x] = TRAVELED;
+
+        switch (dir) {
+            case DIR_NORTH:
+                if (guard.y == 0) {
+                    break;
+                }
+                if (map[guard.y - 1][guard.x] == BLOCK) {
+                    turn_right(&dir);
+                }
+                break;
+            case DIR_EAST:
+                if (guard.x + 1 == width) {
+                    break;
+                }
+                if (map[guard.y][guard.x + 1] == BLOCK) {
+                    turn_right(&dir);
+                }
+                break;
+            case DIR_SOUTH:
+                if (guard.y + 1 == height) {
+                    break;
+                }
+                if (map[guard.y + 1][guard.x] == BLOCK) {
+                    turn_right(&dir);
+                }
+                break;
+            case DIR_WEST:
+                if (guard.x == 0) {
+                    break;
+                }
+                if (map[guard.y][guard.x - 1] == BLOCK) {
+                    turn_right(&dir);
+                }
+                break;
+        }
+
+        switch (dir) {
+            case DIR_NORTH: guard.y--;
+                break;
+            case DIR_EAST: guard.x++;
+                break;
+            case DIR_SOUTH: guard.y++;
+                break;
+            case DIR_WEST: guard.x--;
+                break;
+        }
+
+        /*
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                printf("%c", map[y][x]);
+            }
+            printf("\n");
+        }
+        printf("\n");
+        */
+    }
+
+
+    int v = 0;
+    for (int y = 0; y < height; y++) {
+        for (int x = 0; x < width; x++) {
+            //printf("%c", map[y][x]);
+            if (map[y][x] == TRAVELED) {
+                ++v;
+            }
+        }
+        //printf("\n");
+    }
+
+    return v;
+}
+
+void advent2024day06(void) {
+    size_t height = 0;
+    char **map = get_lines("input/2024/06", &height);
+    const size_t width = strlen(map[0]);
+    Point guard = {.x = 0, .y = 0};
+
+    for (int y = 0; y < height; y++) {
+        for (int x = 0; x < width; x++) {
+            if (map[y][x] == '^') {
+                guard.x = x;
+                guard.y = y;
+                goto GUARD_SEARCH_COMPLETE;
+            }
+        }
+    }
+GUARD_SEARCH_COMPLETE:
+
+    printf("%d\n", sim(guard, map, width, height));
+
+    del_lines(map);
 }

src/2024/07.c

@@ -4,7 +4,10 @@
 #include "lfinput.h"
 
 void advent2024day07(void) {
-  char *input = get_input("input/2024/07");
+  size_t sz = 0;
-  printf("Solution for Day 07 of 2024 is not completed yet\n");
+  char **input = get_lines("input/2024/07", &sz);
-  free(input);
+
+
+
+  del_lines(input);
 }