diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05ced57..95107a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,8 +3,4 @@ project(advent_of_code_2023 C)
 
 set(CMAKE_C_STANDARD 11)
 
-add_executable(advent_of_code_2023 main.c
-        main.h
-        day_1.c
-        array_list.c
-        array_list.h)
+add_executable(day_01 day_1.c)
diff --git a/array_list.c b/array_list.c
deleted file mode 100644
index c3f73cf..0000000
--- a/array_list.c
+++ /dev/null
@@ -1,29 +0,0 @@
-//
-// Created by Lennart on 02/12/2023.
-//
-
-#include <stdlib.h>
-
-#include "array_list.h"
-
-array_list* alist_create(int capacity) {
-    array_list *alist = malloc(sizeof (struct array_list_struct));
-    alist->data = malloc(sizeof (ELEMENT_TYPE) * capacity);
-    alist->capacity = capacity;
-    alist->length = 0;
-    return alist;
-}
-
-void alist_add(array_list *alist, ELEMENT_TYPE entry) {
-    if(alist->length >= alist->capacity) {
-        alist->data = realloc(alist->data, alist->capacity * 2);
-        alist->capacity = alist->capacity * 2;
-    }
-
-    alist->data[alist->length++] = entry;
-}
-
-void alist_free(array_list *alist) {
-    free(alist->data);
-    free(alist);
-}
diff --git a/array_list.h b/array_list.h
index 1fcd20f..5d1384b 100644
--- a/array_list.h
+++ b/array_list.h
@@ -23,3 +23,30 @@ void alist_free(array_list *alist);
 #define ADVENT_OF_CODE_2023_ARRAY_LIST_H
 
 #endif //ADVENT_OF_CODE_2023_ARRAY_LIST_H
+
+//#define ARRAY_LIST_IMPLEMENTATION
+#ifdef ARRAY_LIST_IMPLEMENTATION
+
+array_list* alist_create(int capacity) {
+    array_list *alist = malloc(sizeof (struct array_list_struct));
+    alist->data = malloc(sizeof (ELEMENT_TYPE) * capacity);
+    alist->capacity = capacity;
+    alist->length = 0;
+    return alist;
+}
+
+void alist_add(array_list *alist, ELEMENT_TYPE entry) {
+    if(alist->length >= alist->capacity) {
+        alist->data = realloc(alist->data, alist->capacity * 2);
+        alist->capacity = alist->capacity * 2;
+    }
+
+    alist->data[alist->length++] = entry;
+}
+
+void alist_free(array_list *alist) {
+    free(alist->data);
+    free(alist);
+}
+
+#endif //ARRAY_LIST_IMPLEMENTATION
diff --git a/day_1.c b/day_1.c
index 5077c33..9aca613 100644
--- a/day_1.c
+++ b/day_1.c
@@ -3,11 +3,13 @@
 //
 
 #include <stdio.h>
-#include "main.h"
+
+#define ARRAY_LIST_IMPLEMENTATION
+#include "array_list.h"
 
 int read_line(FILE *f);
 
-int day_1() {
+int main() {
     FILE *f = fopen("day_1.txt", "r");
     if(f == NULL) {
         printf("Error! Missing input file!");
diff --git a/main.c b/main.c
deleted file mode 100644
index 9c65a32..0000000
--- a/main.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "main.h"
-
-int main(int argc, char **argv) {
-    if(argc <= 1) {
-        printf("Please launch with a day number argument!\n");
-        return -1;
-    }
-
-    int day = (int) strtol(argv[1], (char**) NULL, 10);
-    switch (day) {
-        case 1:
-            return day_1();
-        default:
-            printf("Unknown day: %i", day);
-    }
-
-    return 0;
-}
diff --git a/main.h b/main.h
deleted file mode 100644
index c7170a5..0000000
--- a/main.h
+++ /dev/null
@@ -1,11 +0,0 @@
-//
-// Created by Lennart on 02/12/2023.
-//
-
-#ifndef ADVENT_OF_CODE_2023_MAIN_H
-
-int day_1();
-
-#define ADVENT_OF_CODE_2023_MAIN_H
-
-#endif //ADVENT_OF_CODE_2023_MAIN_H