diff --git a/source/balloon.h b/source/balloon.h
index 9b8c445..3264ab2 100644
--- a/source/balloon.h
+++ b/source/balloon.h
@@ -9,63 +9,63 @@ class AnimatedSprite;
 class Texture;
 
 // Cantidad de elementos del vector con los valores de la deformación del globo al rebotar
-#define MAX_BOUNCE 10
+constexpr int MAX_BOUNCE = 10;
 
 // Tipos de globo
-#define BALLOON_1 1
-#define BALLOON_2 2
-#define BALLOON_3 3
-#define BALLOON_4 4
-#define HEXAGON_1 5
-#define HEXAGON_2 6
-#define HEXAGON_3 7
-#define HEXAGON_4 8
-#define POWER_BALL 9
+constexpr int BALLOON_1 = 1;
+constexpr int BALLOON_2 = 2;
+constexpr int BALLOON_3 = 3;
+constexpr int BALLOON_4 = 4;
+constexpr int HEXAGON_1 = 5;
+constexpr int HEXAGON_2 = 6;
+constexpr int HEXAGON_3 = 7;
+constexpr int HEXAGON_4 = 8;
+constexpr int POWER_BALL = 9;
 
 // Puntos de globo
-#define BALLOON_SCORE_1 50
-#define BALLOON_SCORE_2 100
-#define BALLOON_SCORE_3 200
-#define BALLOON_SCORE_4 400
+constexpr int BALLOON_SCORE_1 = 50;
+constexpr int BALLOON_SCORE_2 = 100;
+constexpr int BALLOON_SCORE_3 = 200;
+constexpr int BALLOON_SCORE_4 = 400;
 
 // Tamaños de globo
-#define BALLOON_SIZE_1 1
-#define BALLOON_SIZE_2 2
-#define BALLOON_SIZE_3 3
-#define BALLOON_SIZE_4 4
+constexpr int BALLOON_SIZE_1 = 1;
+constexpr int BALLOON_SIZE_2 = 2;
+constexpr int BALLOON_SIZE_3 = 3;
+constexpr int BALLOON_SIZE_4 = 4;
 
 // Clases de globo
-#define BALLOON_CLASS 0
-#define HEXAGON_CLASS 1
+constexpr int BALLOON_CLASS = 0;
+constexpr int HEXAGON_CLASS = 1;
 
 // Velocidad del globo
-#define BALLOON_VELX_POSITIVE 0.7f
-#define BALLOON_VELX_NEGATIVE -0.7f
+constexpr float BALLOON_VELX_POSITIVE = 0.7f;
+constexpr float BALLOON_VELX_NEGATIVE = -0.7f;
 
-// Indice para las animaciones de los globos
-#define BALLOON_MOVING_ANIMATION 0
-#define BALLOON_POP_ANIMATION 1
-#define BALLOON_BORN_ANIMATION 2
+// Índice para las animaciones de los globos
+constexpr int BALLOON_MOVING_ANIMATION = 0;
+constexpr int BALLOON_POP_ANIMATION = 1;
+constexpr int BALLOON_BORN_ANIMATION = 2;
 
 // Cantidad posible de globos
-#define MAX_BALLOONS 100
+constexpr int MAX_BALLOONS = 100;
 
 // Velocidades a las que se mueven los globos
-#define BALLOON_SPEED_1 0.60f
-#define BALLOON_SPEED_2 0.70f
-#define BALLOON_SPEED_3 0.80f
-#define BALLOON_SPEED_4 0.90f
-#define BALLOON_SPEED_5 1.00f
+constexpr float BALLOON_SPEED_1 = 0.60f;
+constexpr float BALLOON_SPEED_2 = 0.70f;
+constexpr float BALLOON_SPEED_3 = 0.80f;
+constexpr float BALLOON_SPEED_4 = 0.90f;
+constexpr float BALLOON_SPEED_5 = 1.00f;
 
 // Tamaño de los globos
-#define BALLOON_WIDTH_1 8
-#define BALLOON_WIDTH_2 13
-#define BALLOON_WIDTH_3 21
-#define BALLOON_WIDTH_4 37
+constexpr int BALLOON_WIDTH_1 = 8;
+constexpr int BALLOON_WIDTH_2 = 13;
+constexpr int BALLOON_WIDTH_3 = 21;
+constexpr int BALLOON_WIDTH_4 = 37;
 
 // PowerBall
-#define POWERBALL_SCREENPOWER_MINIMUM 10
-#define POWERBALL_COUNTER 8
+constexpr int POWERBALL_SCREENPOWER_MINIMUM = 10;
+constexpr int POWERBALL_COUNTER = 8;
 
 // Clase Balloon
 class Balloon
diff --git a/source/bullet.h b/source/bullet.h
index e4e8003..0956948 100644
--- a/source/bullet.h
+++ b/source/bullet.h
@@ -7,13 +7,13 @@ class Sprite;
 class Texture;
 
 // Tipos de bala
-#define BULLET_UP 1
-#define BULLET_LEFT 2
-#define BULLET_RIGHT 3
+constexpr int BULLET_UP = 1;
+constexpr int BULLET_LEFT = 2;
+constexpr int BULLET_RIGHT = 3;
 
-// Tipos de retorno de la funcion move de la bala
-#define BULLET_MOVE_OK 0
-#define BULLET_MOVE_OUT 1
+// Tipos de retorno de la función move de la bala
+constexpr int BULLET_MOVE_OK = 0;
+constexpr int BULLET_MOVE_OUT = 1;
 
 // Clase Bullet
 class Bullet
diff --git a/source/const.h b/source/const.h
index 4730344..3ebc977 100644
--- a/source/const.h
+++ b/source/const.h
@@ -5,56 +5,56 @@
 #include "lang.h"
 
 // Tamaño de bloque
-#define BLOCK 8
-#define HALF_BLOCK BLOCK / 2
+constexpr int BLOCK = 8;
+constexpr int HALF_BLOCK = BLOCK / 2;
 
 // Tamaño de la pantalla virtual
-#define GAMECANVAS_WIDTH 256
-#define GAMECANVAS_HEIGHT 192
+constexpr int GAMECANVAS_WIDTH = 256;
+constexpr int GAMECANVAS_HEIGHT = 192;
 
 // Zona de juego
-const int PLAY_AREA_TOP = (0 * BLOCK);
-const int PLAY_AREA_BOTTOM = GAMECANVAS_HEIGHT - (4 * BLOCK);
-const int PLAY_AREA_LEFT = (0 * BLOCK);
-const int PLAY_AREA_RIGHT = GAMECANVAS_WIDTH - (0 * BLOCK);
-const int PLAY_AREA_WIDTH = PLAY_AREA_RIGHT - PLAY_AREA_LEFT;
-const int PLAY_AREA_HEIGHT = PLAY_AREA_BOTTOM - PLAY_AREA_TOP;
-const int PLAY_AREA_CENTER_X = PLAY_AREA_LEFT + (PLAY_AREA_WIDTH / 2);
-const int PLAY_AREA_CENTER_FIRST_QUARTER_X = (PLAY_AREA_WIDTH / 4);
-const int PLAY_AREA_CENTER_THIRD_QUARTER_X = (PLAY_AREA_WIDTH / 4) * 3;
-const int PLAY_AREA_CENTER_Y = PLAY_AREA_TOP + (PLAY_AREA_HEIGHT / 2);
-const int PLAY_AREA_FIRST_QUARTER_Y = PLAY_AREA_HEIGHT / 4;
-const int PLAY_AREA_THIRD_QUARTER_Y = (PLAY_AREA_HEIGHT / 4) * 3;
+constexpr int PLAY_AREA_TOP = (0 * BLOCK);
+constexpr int PLAY_AREA_BOTTOM = GAMECANVAS_HEIGHT - (4 * BLOCK);
+constexpr int PLAY_AREA_LEFT = (0 * BLOCK);
+constexpr int PLAY_AREA_RIGHT = GAMECANVAS_WIDTH - (0 * BLOCK);
+constexpr int PLAY_AREA_WIDTH = PLAY_AREA_RIGHT - PLAY_AREA_LEFT;
+constexpr int PLAY_AREA_HEIGHT = PLAY_AREA_BOTTOM - PLAY_AREA_TOP;
+constexpr int PLAY_AREA_CENTER_X = PLAY_AREA_LEFT + (PLAY_AREA_WIDTH / 2);
+constexpr int PLAY_AREA_CENTER_FIRST_QUARTER_X = (PLAY_AREA_WIDTH / 4);
+constexpr int PLAY_AREA_CENTER_THIRD_QUARTER_X = (PLAY_AREA_WIDTH / 4) * 3;
+constexpr int PLAY_AREA_CENTER_Y = PLAY_AREA_TOP + (PLAY_AREA_HEIGHT / 2);
+constexpr int PLAY_AREA_FIRST_QUARTER_Y = PLAY_AREA_HEIGHT / 4;
+constexpr int PLAY_AREA_THIRD_QUARTER_Y = (PLAY_AREA_HEIGHT / 4) * 3;
 
 // Anclajes de pantalla
-const int GAMECANVAS_CENTER_X = GAMECANVAS_WIDTH / 2;
-const int GAMECANVAS_FIRST_QUARTER_X = GAMECANVAS_WIDTH / 4;
-const int GAMECANVAS_THIRD_QUARTER_X = (GAMECANVAS_WIDTH / 4) * 3;
-const int GAMECANVAS_CENTER_Y = GAMECANVAS_HEIGHT / 2;
-const int GAMECANVAS_FIRST_QUARTER_Y = GAMECANVAS_HEIGHT / 4;
-const int GAMECANVAS_THIRD_QUARTER_Y = (GAMECANVAS_HEIGHT / 4) * 3;
+constexpr int GAMECANVAS_CENTER_X = GAMECANVAS_WIDTH / 2;
+constexpr int GAMECANVAS_FIRST_QUARTER_X = GAMECANVAS_WIDTH / 4;
+constexpr int GAMECANVAS_THIRD_QUARTER_X = (GAMECANVAS_WIDTH / 4) * 3;
+constexpr int GAMECANVAS_CENTER_Y = GAMECANVAS_HEIGHT / 2;
+constexpr int GAMECANVAS_FIRST_QUARTER_Y = GAMECANVAS_HEIGHT / 4;
+constexpr int GAMECANVAS_THIRD_QUARTER_Y = (GAMECANVAS_HEIGHT / 4) * 3;
 
 // Secciones del programa
-#define SECTION_PROG_LOGO 0
-#define SECTION_PROG_INTRO 1
-#define SECTION_PROG_TITLE 2
-#define SECTION_PROG_GAME 3
-#define SECTION_PROG_QUIT 4
+constexpr int SECTION_PROG_LOGO = 0;
+constexpr int SECTION_PROG_INTRO = 1;
+constexpr int SECTION_PROG_TITLE = 2;
+constexpr int SECTION_PROG_GAME = 3;
+constexpr int SECTION_PROG_QUIT = 4;
 
 // Subsecciones
-#define SUBSECTION_GAME_PLAY_1P 0
-#define SUBSECTION_GAME_PLAY_2P 1
-#define SUBSECTION_GAME_PAUSE 2
-#define SUBSECTION_GAME_GAMEOVER 3
-#define SUBSECTION_TITLE_1 3
-#define SUBSECTION_TITLE_2 4
-#define SUBSECTION_TITLE_3 5
-#define SUBSECTION_TITLE_INSTRUCTIONS 6
+constexpr int SUBSECTION_GAME_PLAY_1P = 0;
+constexpr int SUBSECTION_GAME_PLAY_2P = 1;
+constexpr int SUBSECTION_GAME_PAUSE = 2;
+constexpr int SUBSECTION_GAME_GAMEOVER = 3;
+constexpr int SUBSECTION_TITLE_1 = 3;
+constexpr int SUBSECTION_TITLE_2 = 4;
+constexpr int SUBSECTION_TITLE_3 = 5;
+constexpr int SUBSECTION_TITLE_INSTRUCTIONS = 6;
 
 // Ningun tipo
-#define NO_KIND 0
+constexpr int NO_KIND = 0;
 
 // Colores
 const color_t bgColor = {0x27, 0x27, 0x36};
 const color_t noColor = {0xFF, 0xFF, 0xFF};
-const color_t shdwTxtColor = {0x43, 0x43, 0x4F};
\ No newline at end of file
+const color_t shdwTxtColor = {0x43, 0x43, 0x4F};
diff --git a/source/director.h b/source/director.h
index e974cd0..603639e 100644
--- a/source/director.h
+++ b/source/director.h
@@ -15,7 +15,7 @@ struct options_t;
 struct section_t;
 
 // Textos
-#define WINDOW_CAPTION "Coffee Crisis"
+constexpr const char* WINDOW_CAPTION = "Coffee Crisis";
 
 class Director
 {
diff --git a/source/fade.h b/source/fade.h
index 6cf4dcc..aafb854 100644
--- a/source/fade.h
+++ b/source/fade.h
@@ -5,9 +5,9 @@
 #include <SDL2/SDL_stdinc.h>  // for Uint8, Uint16
 
 // Tipos de fundido
-#define FADE_FULLSCREEN 0
-#define FADE_CENTER 1
-#define FADE_RANDOM_SQUARE 2
+constexpr int FADE_FULLSCREEN = 0;
+constexpr int FADE_CENTER = 1;
+constexpr int FADE_RANDOM_SQUARE = 2;
 
 // Clase Fade
 class Fade
diff --git a/source/game.h b/source/game.h
index 50358e3..6dc6751 100644
--- a/source/game.h
+++ b/source/game.h
@@ -26,31 +26,31 @@ struct JA_Music_t;
 struct JA_Sound_t;
 
 // Cantidad de elementos a escribir en los ficheros de datos
-#define TOTAL_SCORE_DATA 3
-#define TOTAL_DEMO_DATA 2000
+constexpr int TOTAL_SCORE_DATA = 3;
+constexpr int TOTAL_DEMO_DATA = 2000;
 
 // Contadores
-#define STAGE_COUNTER 200
-#define SHAKE_COUNTER 10
-#define HELP_COUNTER 1000
-#define GAME_COMPLETED_START_FADE 500
-#define GAME_COMPLETED_END 700
+constexpr int STAGE_COUNTER = 200;
+constexpr int SHAKE_COUNTER = 10;
+constexpr int HELP_COUNTER = 1000;
+constexpr int GAME_COMPLETED_START_FADE = 500;
+constexpr int GAME_COMPLETED_END = 700;
 
 // Formaciones enemigas
-#define NUMBER_OF_ENEMY_FORMATIONS 100
-#define MAX_NUMBER_OF_ENEMIES_IN_A_FORMATION 50
+constexpr int NUMBER_OF_ENEMY_FORMATIONS = 100;
+constexpr int MAX_NUMBER_OF_ENEMIES_IN_A_FORMATION = 50;
 
 // Porcentaje de aparición de los objetos
-#define ITEM_POINTS_1_DISK_ODDS 10
-#define ITEM_POINTS_2_GAVINA_ODDS 6
-#define ITEM_POINTS_3_PACMAR_ODDS 3
-#define ITEM_CLOCK_ODDS 5
-#define ITEM_COFFEE_ODDS 5
-#define ITEM_POWER_BALL_ODDS 0
-#define ITEM_COFFEE_MACHINE_ODDS 4
+constexpr int ITEM_POINTS_1_DISK_ODDS = 10;
+constexpr int ITEM_POINTS_2_GAVINA_ODDS = 6;
+constexpr int ITEM_POINTS_3_PACMAR_ODDS = 3;
+constexpr int ITEM_CLOCK_ODDS = 5;
+constexpr int ITEM_COFFEE_ODDS = 5;
+constexpr int ITEM_POWER_BALL_ODDS = 0;
+constexpr int ITEM_COFFEE_MACHINE_ODDS = 4;
 
 // Valores para las variables asociadas a los objetos
-#define TIME_STOPPED_COUNTER 300
+constexpr int TIME_STOPPED_COUNTER = 300;
 
 // Clase Game
 class Game
diff --git a/source/input.h b/source/input.h
index 40683f8..f5255a4 100644
--- a/source/input.h
+++ b/source/input.h
@@ -6,6 +6,15 @@
 #include <string>                     // for string, basic_string
 #include <vector>                     // for vector
 
+// Valores de repetición
+constexpr bool REPEAT_TRUE = true;
+constexpr bool REPEAT_FALSE = false;
+
+// Métodos de entrada
+constexpr int INPUT_USE_KEYBOARD = 0;
+constexpr int INPUT_USE_GAMECONTROLLER = 1;
+constexpr int INPUT_USE_ANY = 2;
+
 enum inputs_e
 {
 	// Inputs obligatorios
@@ -31,13 +40,6 @@ enum inputs_e
 	input_number_of_inputs
 };
 
-#define REPEAT_TRUE true
-#define REPEAT_FALSE false
-
-#define INPUT_USE_KEYBOARD 0
-#define INPUT_USE_GAMECONTROLLER 1
-#define INPUT_USE_ANY 2
-
 enum i_disable_e
 {
 	d_notDisabled,
diff --git a/source/intro.h b/source/intro.h
index 5f54ac8..4a4ddaf 100644
--- a/source/intro.h
+++ b/source/intro.h
@@ -15,9 +15,6 @@ class Writer;
 struct JA_Music_t;
 struct section_t;
 
-#ifndef INTRO_H
-#define INTRO_H
-
 // Clase Intro
 class Intro
 {
@@ -69,5 +66,3 @@ public:
 	// Bucle principal
 	void run();
 };
-
-#endif
diff --git a/source/item.h b/source/item.h
index 7b66c0d..2a3b467 100644
--- a/source/item.h
+++ b/source/item.h
@@ -9,12 +9,12 @@ class AnimatedSprite;
 class Texture;
 
 // Tipos de objetos
-#define ITEM_POINTS_1_DISK 1
-#define ITEM_POINTS_2_GAVINA 2
-#define ITEM_POINTS_3_PACMAR 3
-#define ITEM_CLOCK 4
-#define ITEM_COFFEE 5
-#define ITEM_COFFEE_MACHINE 6
+constexpr int ITEM_POINTS_1_DISK = 1;
+constexpr int ITEM_POINTS_2_GAVINA = 2;
+constexpr int ITEM_POINTS_3_PACMAR = 3;
+constexpr int ITEM_CLOCK = 4;
+constexpr int ITEM_COFFEE = 5;
+constexpr int ITEM_COFFEE_MACHINE = 6;
 
 // Clase Item
 class Item
diff --git a/source/lang.h b/source/lang.h
index a9734ef..e155914 100644
--- a/source/lang.h
+++ b/source/lang.h
@@ -5,13 +5,13 @@
 class Asset;
 
 // Códigos de idioma
-#define es_ES 0
-#define ba_BA 1
-#define en_UK 2
-#define MAX_LANGUAGES 3
+constexpr int es_ES = 0;
+constexpr int ba_BA = 1;
+constexpr int en_UK = 2;
+constexpr int MAX_LANGUAGES = 3;
 
 // Textos
-#define MAX_TEXT_STRINGS 100
+constexpr int MAX_TEXT_STRINGS = 100;
 
 // Clase Lang
 class Lang
diff --git a/source/logo.cpp b/source/logo.cpp
index 6e173d4..5d415b8 100644
--- a/source/logo.cpp
+++ b/source/logo.cpp
@@ -11,8 +11,9 @@
 #include "texture.h"         // for Texture
 #include "utils.h"           // for section_t, color_t
 
-#define INIT_FADE 100
-#define END_LOGO 200
+// Valores de inicialización y fin
+constexpr int INIT_FADE = 100;
+constexpr int END_LOGO = 200;
 
 // Constructor
 Logo::Logo(SDL_Renderer *renderer, Screen *screen, Asset *asset, Input *input, section_t *section)
diff --git a/source/menu.h b/source/menu.h
index fa79c98..8f54ce7 100644
--- a/source/menu.h
+++ b/source/menu.h
@@ -10,17 +10,17 @@ class Input;
 class Text;
 struct JA_Sound_t;
 
-// Tipos de fondos para el menu
-#define MENU_BACKGROUND_TRANSPARENT 0
-#define MENU_BACKGROUND_SOLID 1
+// Tipos de fondos para el menú
+constexpr int MENU_BACKGROUND_TRANSPARENT = 0;
+constexpr int MENU_BACKGROUND_SOLID = 1;
 
 // Tipos de archivos de audio
-#define SOUND_ACCEPT 0
-#define SOUND_MOVE 1
-#define SOUND_CANCEL 2
+constexpr int SOUND_ACCEPT = 0;
+constexpr int SOUND_MOVE = 1;
+constexpr int SOUND_CANCEL = 2;
 
-// Opciones de menu
-#define MENU_NO_OPTION -1
+// Opciones de menú
+constexpr int MENU_NO_OPTION = -1;
 
 // Clase Menu
 class Menu
diff --git a/source/player.h b/source/player.h
index d0205f6..cac997e 100644
--- a/source/player.h
+++ b/source/player.h
@@ -9,21 +9,21 @@ class AnimatedSprite;
 class Texture;
 
 // Contadores
-#define DEATH_COUNTER 350
+constexpr int DEATH_COUNTER = 350;
 
 // Estados del jugador
-#define PLAYER_STATUS_WALKING_LEFT 0
-#define PLAYER_STATUS_WALKING_RIGHT 1
-#define PLAYER_STATUS_WALKING_STOP 2
+constexpr int PLAYER_STATUS_WALKING_LEFT = 0;
+constexpr int PLAYER_STATUS_WALKING_RIGHT = 1;
+constexpr int PLAYER_STATUS_WALKING_STOP = 2;
 
-#define PLAYER_STATUS_FIRING_UP 0
-#define PLAYER_STATUS_FIRING_LEFT 1
-#define PLAYER_STATUS_FIRING_RIGHT 2
-#define PLAYER_STATUS_FIRING_NO 3
+constexpr int PLAYER_STATUS_FIRING_UP = 0;
+constexpr int PLAYER_STATUS_FIRING_LEFT = 1;
+constexpr int PLAYER_STATUS_FIRING_RIGHT = 2;
+constexpr int PLAYER_STATUS_FIRING_NO = 3;
 
 // Variables del jugador
-#define PLAYER_INVULNERABLE_COUNTER 200
-#define PLAYER_POWERUP_COUNTER 1500
+constexpr int PLAYER_INVULNERABLE_COUNTER = 200;
+constexpr int PLAYER_POWERUP_COUNTER = 1500;
 
 // Clase Player
 class Player
diff --git a/source/screen.h b/source/screen.h
index 4b793e8..951a357 100644
--- a/source/screen.h
+++ b/source/screen.h
@@ -8,8 +8,9 @@
 #include "utils.h"               // for color_t
 class Asset;
 
-#define FILTER_NEAREST 0
-#define FILTER_LINEAL 1
+// Tipos de filtro
+constexpr int FILTER_NEAREST = 0;
+constexpr int FILTER_LINEAL = 1;
 
 class Screen
 {
diff --git a/source/text.h b/source/text.h
index d9cbb28..07592cc 100644
--- a/source/text.h
+++ b/source/text.h
@@ -7,10 +7,11 @@ class Sprite;
 class Texture;
 #include "utils.h"
 
-#define TXT_COLOR 1
-#define TXT_SHADOW 2
-#define TXT_CENTER 4
-#define TXT_STROKE 8
+// Opciones de texto
+constexpr int TXT_COLOR = 1;
+constexpr int TXT_SHADOW = 2;
+constexpr int TXT_CENTER = 4;
+constexpr int TXT_STROKE = 8;
 
 struct offset_t
 {
diff --git a/source/title.h b/source/title.h
index af923a4..30d5357 100644
--- a/source/title.h
+++ b/source/title.h
@@ -23,13 +23,13 @@ struct JA_Music_t;
 struct JA_Sound_t;
 
 // Textos
-#define TEXT_COPYRIGHT "@2020,2023 JailDesigner (v2.3.1)"
+constexpr const char* TEXT_COPYRIGHT = "@2020,2023 JailDesigner (v2.3.1)";
 
 // Contadores
-#define TITLE_COUNTER 800
+constexpr int TITLE_COUNTER = 800;
 
-// Cantidad de eventos de la pantalla de titulo
-#define TITLE_TOTAL_EVENTS 2
+// Cantidad de eventos de la pantalla de título
+constexpr int TITLE_TOTAL_EVENTS = 2;
 
 class Title
 {
diff --git a/source/utils.h b/source/utils.h
index 3baa125..13469f6 100644
--- a/source/utils.h
+++ b/source/utils.h
@@ -6,13 +6,9 @@
 #include <vector>             // for vector
 
 // Dificultad del juego
-#define DIFFICULTY_EASY 0
-#define DIFFICULTY_NORMAL 1
-#define DIFFICULTY_HARD 2
-
-// Tipo de filtro
-#define FILTER_NEAREST 0
-#define FILTER_LINEAL 1
+constexpr int DIFFICULTY_EASY = 0;
+constexpr int DIFFICULTY_NORMAL = 1;
+constexpr int DIFFICULTY_HARD = 2;
 
 // Estructura para definir un circulo
 struct circle_t