feat: add day 3

input_handler.c

@@ -18,11 +18,12 @@ char* read_line(FILE *f, char **buffer, int *capacity) {
     while(!feof(f)) {
         char *res = fgets(*buffer + position, *capacity - position, f);
         if(res[strlen(res) - 1] == '\n') {
+            (*buffer)[strlen(*buffer) - 1] = 0;
             return *buffer;
         }
 
         *buffer = realloc(*buffer, 2 * sizeof (char) * *capacity);
-        position += (int) strlen(res);
+        position = (int) strlen(*buffer);
         *capacity *= 2;
     }