diff --git a/ du6/a_station.c. b/ du6/a_station.c.
deleted file mode 100644
index cc49a8d..0000000
--- a/ du6/a_station.c.	
+++ /dev/null
@@ -1,176 +0,0 @@
-#include "a_station.h"
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-static void normalize_target(char normalized[TARGET_SIZE], const char* target) {
-	if (target == NULL) {
-		normalized[0] = '\0';
-		return;
-	}
-
-	strncpy(normalized, target, TARGET_SIZE - 1);
-	normalized[TARGET_SIZE - 1] = '\0';
-}
-
-struct station* create_station() {
-	struct station* station = (struct station*)calloc(1, sizeof(struct station));
-	if (station == NULL) {
-		return NULL;
-	}
-
-	station->tracks = (struct car**)calloc(STATION_SIZE, sizeof(struct car*));
-	if (station->tracks == NULL) {
-		free(station);
-		return NULL;
-	}
-
-	station->track_count = STATION_SIZE;
-	return station;
-}
-
-void destroy_station(struct station* station) {
-	int i;
-
-	if (station == NULL) {
-		return;
-	}
-
-	if (station->tracks != NULL) {
-		for (i = 0; i < station->track_count; i++) {
-			struct car* current = station->tracks[i];
-			while (current != NULL) {
-				struct car* next = current->next;
-				free(current);
-				current = next;
-			}
-		}
-		free(station->tracks);
-	}
-
-	free(station);
-}
-
-int select_track(struct station* station, const char* target) {
-	unsigned long hash = 5381;
-	const unsigned char* p;
-	char normalized[TARGET_SIZE];
-
-	if (station == NULL || station->track_count <= 0 || target == NULL) {
-		return 0;
-	}
-
-	normalize_target(normalized, target);
-	p = (const unsigned char*)normalized;
-
-	while (*p != '\0') {
-		hash = ((hash << 5) + hash) + *p;
-		p++;
-	}
-
-	return (int)(hash % (unsigned long)station->track_count);
-}
-
-void add_target_capacity(struct station* station, const char* target, int capacity) {
-	int index;
-	struct car* current;
-	struct car* new_car;
-	char normalized[TARGET_SIZE];
-
-	if (station == NULL || station->tracks == NULL || target == NULL || capacity <= 0) {
-		return;
-	}
-
-	normalize_target(normalized, target);
-
-	index = select_track(station, normalized);
-	current = station->tracks[index];
-
-	while (current != NULL) {
-		if (strcmp(current->value, normalized) == 0) {
-			if (current->capacity > INT_MAX - capacity) {
-				current->capacity = INT_MAX;
-				return;
-			}
-			current->capacity += capacity;
-			return;
-		}
-		current = current->next;
-	}
-
-	new_car = (struct car*)calloc(1, sizeof(struct car));
-	if (new_car == NULL) {
-		return;
-	}
-
-	strncpy(new_car->value, normalized, TARGET_SIZE - 1);
-	new_car->value[TARGET_SIZE - 1] = '\0';
-	new_car->capacity = capacity;
-	new_car->next = station->tracks[index];
-	station->tracks[index] = new_car;
-}
-
-int get_target_capacity(struct station* station, const char* target) {
-	int index;
-	struct car* current;
-	char normalized[TARGET_SIZE];
-
-	if (station == NULL || station->tracks == NULL || target == NULL) {
-		return 0;
-	}
-
-	normalize_target(normalized, target);
-
-	index = select_track(station, normalized);
-	current = station->tracks[index];
-
-	while (current != NULL) {
-		if (strcmp(current->value, normalized) == 0) {
-			return current->capacity;
-		}
-		current = current->next;
-	}
-
-	return 0;
-}
-
-int count_targets(struct station* station) {
-	int i;
-	int count = 0;
-
-	if (station == NULL || station->tracks == NULL) {
-		return 0;
-	}
-
-	for (i = 0; i < station->track_count; i++) {
-		struct car* current = station->tracks[i];
-		while (current != NULL) {
-			count++;
-			current = current->next;
-		}
-	}
-
-	return count;
-}
-
-int count_capacity(struct station* station) {
-	int i;
-	int sum = 0;
-
-	if (station == NULL || station->tracks == NULL) {
-		return 0;
-	}
-
-	for (i = 0; i < station->track_count; i++) {
-		struct car* current = station->tracks[i];
-		while (current != NULL) {
-			if (current->capacity > 0 && sum > INT_MAX - current->capacity) {
-				return INT_MAX;
-			}
-			sum += current->capacity;
-			current = current->next;
-		}
-	}
-
-	return sum;
-}