En realitat és la primera part del puzzle

aoc_25_1_1/src/aoc25.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <string.h>
+
+extern int left(int a, int b);
+extern int right(int a, int b);
+extern int count(int a, int b);
+
+int main(void) {
+    int dial = 50;
+    int rotation;
+    char direction[2];
+    int password = 0;
+
+    FILE *fptr = fopen("aoc25_1_1.txt", "r");
+
+    if (fptr == NULL) {
+        printf("Error, puzzle input aoc25_1_1.txt not found\n");
+        return (1);
+    }
+
+    printf("DIAL starts at %d\n", dial);
+
+    while (fscanf(fptr, "%s %d", direction, &rotation) == 2) {
+        printf("DIRECTION %s ROTATION %d\n", direction, rotation);
+
+        if (strcmp(direction, "L") == 0) {
+            dial = left(dial, rotation);
+            printf("DIAL is now %d\n", dial);
+        }
+
+        if (strcmp(direction, "R") == 0) {
+            dial = right(dial, rotation);
+            printf("DIAL is now %d\n", dial);
+        }
+
+        password = count(password, dial);
+        printf("PASSWORD is now %d\n", password);
+    }
+
+    fclose(fptr);
+
+    return (0);
+}