diff --git a/inc/malloc.h b/inc/malloc.h
index 2bf08ee..6113771 100644
--- a/inc/malloc.h
+++ b/inc/malloc.h
@@ -40,9 +40,9 @@ typedef struct s_zones {
 extern pthread_mutex_t g_malloc_mutex;
 extern t_zones g_zones;
 
-void *ft_malloc(size_t size);
-void ft_free(void *ptr);
-void *ft_realloc(void *ptr, size_t size);
+void *malloc(size_t size);
+void free(void *ptr);
+void *realloc(void *ptr, size_t size);
 
 void show_alloc_mem(void);
 void show_alloc_mem_ex(void);
@@ -51,5 +51,12 @@ void show_alloc_sizes(void);
 void init_tiny_zones(void);
 void init_small_zones(void);
 
+size_t ft_strlen(const char *str);
+void ft_putstr(char *str);
+void ft_putnbr(size_t nbr);
+void ft_putaddr(size_t nbr);
+void ft_putchar(char c);
+void ft_printf(const char *str, ...);
+
 #endif
 
diff --git a/main.c b/main.c
index 1a52ae1..49cb951 100644
--- a/main.c
+++ b/main.c
@@ -3,38 +3,32 @@
 
 int main(int argc, char **argv) {
 	srand(argv[1][0]+argv[1][1]+argv[1][2]);
-	int **arr = (int **)ft_malloc(atoi(argv[2]) * sizeof(int *));
+	int **arr = (int **)malloc(atoi(argv[2]) * sizeof(int *));
 	size_t size;
 	for (int i = 0; i < atoi(argv[2]); i++) {
 		size = (rand() & 0x7ff) | 0xf00000;
-		arr[i] = (int *)ft_malloc(size * sizeof(int));
-		printf ("arr %d addr: %p arr size: %zu\n", i, arr[i], size);
-		//ft_free(arr);
-	}
-	ft_free(arr[3]);
-	ft_free(arr[5]);
-	ft_free(arr[1]);
-	ft_free(arr[6]);
-	ft_free(arr[2]);
-	ft_free(arr[4]);
-	ft_free(arr[0]);
-	ft_free(arr[7]);
-//	for (int i = 0; i < atoi(argv[2]); i++) {
-//		ft_free(arr[i]);
-//	}
-	printf("second round\n");
-	for (int i = 0; i < atoi(argv[2]); i++) {
-		size = (rand() & 0x7ff) | 0xf00000;
-		arr[i] = (int *)ft_malloc(size * sizeof(int));
-		printf ("arr %d addr: %p arr size: %zu\n", i, arr[i], size);
-		//ft_free(arr);
+		arr[i] = (int *)malloc(size * sizeof(int));
+		ft_printf ("arr %d addr: %p arr size: %d\n", i, arr[i], size);
+		//free(arr);
 	}
 	for (int i = 0; i < atoi(argv[2]); i++) {
-		ft_free(arr[i]);
+		free(arr[i]);
 	}
-	printf("free arr");
-	ft_free(arr);
+	ft_printf("second round\n");
+	for (int i = 0; i < atoi(argv[2]); i++) {
+		size = (rand() & 0x7ff);// | 0xf00000;
+		arr[i] = (int *)malloc(size * sizeof(int));
+		ft_printf ("arr %d addr: %p arr size: %d\n", i, arr[i], size);
+		//free(arr);
+	}
+	for (int i = 0; i < atoi(argv[2]); i++) {
+		free(arr[i]);
+	}
+	ft_printf("free arr");
+	free(arr);
 	show_alloc_sizes();
+	show_alloc_mem();
+	ft_printf("%d\n", 42);
 	return 0;
 }
 
diff --git a/src/free.c b/src/free.c
index eafcb31..da01f26 100644
--- a/src/free.c
+++ b/src/free.c
@@ -1,17 +1,29 @@
 #include "malloc.h"
 
-void ft_free(void *ptr) {
+void free(void *ptr) {
+	write(1, "free\n", 5);
 	pthread_mutex_lock(&g_malloc_mutex);
+	write(1, "free\n", 5);
+	if (ptr == NULL) {
+		ft_printf("free null\n");
+		pthread_mutex_unlock(&g_malloc_mutex);
+		return;
+	}
 	t_block *block = (t_block *)((char *)ptr - sizeof(t_block));
+	write(1, "free\n", 5);
 	if (block->size < g_zones.small_block_max_size) {
+	write(1, "rree\n", 5);
 		block->free = 1;
 	} else {
+		write(1, "1\n", 2);
 		t_block *curr = g_zones.large_blocks;
 		if (curr == NULL) {
+		write(1, "E\n", 2);
 			pthread_mutex_unlock(&g_malloc_mutex);
 			return; 
 		}
 		if ((char *)curr + sizeof(t_block) == (char *)ptr) {
+		write(1, "2\n", 2);
 			g_zones.large_blocks = curr->next;
 			munmap((char *)ptr - sizeof(t_block) - (16 - sizeof(t_block) % 16), curr->size + sizeof(t_block) + (16 - sizeof(t_block) % 16)); 
 			pthread_mutex_unlock(&g_malloc_mutex);
@@ -20,10 +32,12 @@ void ft_free(void *ptr) {
 		while ((char *)curr->next + sizeof(t_block) != (char *)ptr) {
 			curr = curr->next;
 			if (curr == NULL) {
+				write(1, "e\n", 2);
 				pthread_mutex_unlock(&g_malloc_mutex);
 				return; 
 			}
 		}
+		write(1, "3\n", 2);
 		t_block *to_free = curr->next;
 		curr->next = curr->next->next;
 		munmap((char *)ptr - sizeof(t_block) - (16 - sizeof(t_block) % 16), to_free->size + sizeof(t_block) + (16 - sizeof(t_block) % 16));
diff --git a/src/init.c b/src/init.c
index a02e130..5663b17 100644
--- a/src/init.c
+++ b/src/init.c
@@ -1,6 +1,6 @@
 #include "malloc.h"
 
-pthread_mutex_t g_malloc_mutex;
+pthread_mutex_t g_malloc_mutex = PTHREAD_MUTEX_INITIALIZER;
 t_zones g_zones;
 
 void init_tiny_zones(void) {
diff --git a/src/libft.c b/src/libft.c
new file mode 100644
index 0000000..ecc8ac5
--- /dev/null
+++ b/src/libft.c
@@ -0,0 +1,73 @@
+#include "malloc.h"
+
+size_t ft_strlen(const char *str) {
+	size_t i = 0;
+	while (str[i]) {
+		i++;
+	}
+	return i;
+}
+
+void ft_putstr(char *str) {
+	write(1, str, ft_strlen(str));
+}
+
+void ft_putnbr(size_t nbr) {
+	size_t tool = 10;
+	while (nbr > tool) {
+		tool *= 10;
+	}
+	tool /= 10;
+	while (tool >= 1) {
+		ft_putchar('0' + (nbr / tool) % 10);
+		tool /= 10;
+	}
+}
+
+void ft_putaddr(size_t nbr) {
+	write(1, "0x", 2);
+	size_t tool = 16;
+	while (nbr > tool) {
+		tool *= 16;
+	}
+	while (tool >= 1) {
+		size_t digit = (nbr / tool) % 16;
+		if (digit < 10) {
+			ft_putchar('0' + digit);
+		} else {
+			ft_putchar('A' + digit - 10);
+		}
+		tool /= 16;
+	}
+}
+
+void ft_putchar(char c) {
+	write(1, &c, 1);
+}
+
+void ft_printf(const char *str, ...) {
+	va_list args;
+	va_start(args, str);
+	size_t len = ft_strlen(str);
+	for (size_t i = 0; i < len; i++) {
+		if (str[i] != '%') {
+			ft_putchar(str[i]);
+		} else if (i + 1 < len) {
+			char flag = str[i + 1];
+			if (flag == 'd') {
+				ft_putnbr(va_arg(args, size_t));
+			} else if (flag == 'p') {
+				ft_putaddr(va_arg(args, size_t));
+			} else if (flag == 's') {
+				ft_putstr(va_arg(args, char *));
+			} else {
+				write(1, "ft_printf format error 1\n", 25);
+				return;
+			}
+			i++;
+		} else {
+			write(1, "ft_printf format error 2\n", 25);
+			return;
+		}
+	}
+}
diff --git a/src/malloc.c b/src/malloc.c
index b630b80..704f753 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -22,16 +22,16 @@ void *malloc_tiny(size_t size) {
 			}
 			zone->head = (t_block *)addr;
 			curr = zone->head;
-			/*printf("addr of g_zones.tiny_zones : %p\n"
+			ft_printf("addr of g_zones.tiny_zones : %p\n"
 					"addr of zone : %p\n"
 					"addr of *head %p\n"
-					"sizeof tzone : %zu\n"
-					"size of tblock %zu\n",
+					"sizeof tzone : %d\n"
+					"size of tblock %d\n",
 					g_zones.tiny_zones,
 					zone,
 					curr,
 					sizeof(t_zone),
-					sizeof(t_block));*/
+					sizeof(t_block));
 			curr->size = size;
 			curr->free = 0;
 			curr->next = NULL;
@@ -62,6 +62,7 @@ void *malloc_tiny(size_t size) {
 			zone = zone->next;
 		}
 	}
+	ft_printf("ITS A BIG MISTAKE IF IT EVER GOES THERE WHILE TRYING TO ALLOCATE A TINY BLOCK THAT WOULD BE A HUGE BUMMER AND WOULD MAKE THE HEADLINES OF INTERNATIONAL NEWS FOR A WEEK\n");
 	return NULL;
 }
 
@@ -87,16 +88,16 @@ void *malloc_small(size_t size) {
 			}
 			zone->head = (t_block *)addr;
 			curr = zone->head;
-			/*printf("addr of g_zones.small_zones : %p\n"
+			ft_printf("addr of g_zones.small_zones : %p\n"
 					"addr of zone : %p\n"
 					"addr of *head %p\n"
-					"sizeof tzone : %zu\n"
-					"size of tblock %zu\n",
+					"sizeof tzone : %d\n"
+					"size of tblock %d\n",
 					g_zones.small_zones,
 					zone,
 					curr,
 					sizeof(t_zone),
-					sizeof(t_block));*/
+					sizeof(t_block));
 			curr->size = size;
 			curr->free = 0;
 			curr->next = NULL;
@@ -127,6 +128,7 @@ void *malloc_small(size_t size) {
 			zone = zone->next;
 		}
 	}
+	ft_printf("ITS A BIG MISTAKE IF IT EVER GOES THERE WHILE TRYING TO ALLOCATE A SMALL BLOCK THAT WOULD BE A HUGE BUMMER AND WOULD MAKE THE HEADLINES OF INTERNATIONAL NEWS FOR A WEEK\n");
 	return NULL;
 }
 
@@ -153,14 +155,18 @@ void *malloc_large(size_t size) {
 	return (void *)((char *)curr + sizeof(t_block));
 }
 
-void *ft_malloc(size_t size) {
+void *malloc(size_t size) {
 	pthread_mutex_lock(&g_malloc_mutex);
+	ft_printf("malloc %d\n", size);
 	void *ptr = NULL;
 	if (size < g_zones.tiny_block_max_size) {
+	write(1, "malloc tiny\n", 12);
 		ptr = malloc_tiny(size);
 	} else if (size < g_zones.small_block_max_size) {
+	write(1, "malloc small\n", 13);
 		ptr = malloc_small(size);
 	} else {
+	write(1, "malloc large\n", 13);
 		ptr = malloc_large(size);
 	}
 	pthread_mutex_unlock(&g_malloc_mutex);
diff --git a/src/realloc.c b/src/realloc.c
index 825ba2c..0fd3cad 100644
--- a/src/realloc.c
+++ b/src/realloc.c
@@ -1,10 +1,87 @@
 #include "malloc.h"
 
+void ft_memcpy(char *dst, char *src, size_t size) {
+	write(1, "m\n", 2);
+	for (size_t i = 0; i < size; i++) {
+		dst[i] = src[i];
+	}
+}
+
 void *realloc(void *ptr, size_t size) {
+	if (!ptr) {
+		return malloc(size);
+	}
+	write(1, "realloc\n", 8);
+	show_alloc_mem();
+	ft_printf("realloc %p %d\n", ptr, size);
 	pthread_mutex_lock(&g_malloc_mutex);
-	write(1, "1337\n", 5);
-	(void)size;
-	(void)ptr;
+	t_block *block = (t_block *)((char *)ptr - sizeof(t_block));
+	if (block->size < g_zones.tiny_block_max_size) {
+		if (size >= g_zones.tiny_block_max_size) {
+			ft_printf("good\n");
+			ft_printf("good\n");
+			ft_printf("good\n");
+	pthread_mutex_unlock(&g_malloc_mutex);
+			char *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_printf("good\n");
+			ft_printf("new_maloc_done\n");
+			ft_memcpy(new_ptr, ptr, block->size);
+			ft_printf("done\n");
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		} else {
+			// todo tiny to tiny realloc
+	pthread_mutex_unlock(&g_malloc_mutex);
+			void *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_memcpy(new_ptr, ptr, block->size);
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		}
+	} else if (block->size < g_zones.small_block_max_size) {
+		if (size < g_zones.tiny_block_max_size || size >= g_zones.small_block_max_size) {
+	pthread_mutex_unlock(&g_malloc_mutex);
+			void *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_memcpy(new_ptr, ptr, block->size);
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		} else {
+			// todo small to small realloc
+	pthread_mutex_unlock(&g_malloc_mutex);
+			void *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_memcpy(new_ptr, ptr, block->size);
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		}
+	} else {
+		if (size < g_zones.small_block_max_size) {
+	pthread_mutex_unlock(&g_malloc_mutex);
+			void *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_memcpy(new_ptr, ptr, block->size);
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		} else {
+			// todo large to large realloc
+	pthread_mutex_unlock(&g_malloc_mutex);
+			void *new_ptr = malloc(size);
+	pthread_mutex_lock(&g_malloc_mutex);
+			ft_memcpy(new_ptr, ptr, block->size);
+	pthread_mutex_unlock(&g_malloc_mutex);
+			free(ptr);
+	pthread_mutex_lock(&g_malloc_mutex);
+		}
+	}
+	ft_printf("exiting\n");
+	show_alloc_mem();
 	pthread_mutex_unlock(&g_malloc_mutex);
 	return ptr;
 }
diff --git a/src/utils.c b/src/utils.c
index 105f57c..56d18e3 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,6 +1,48 @@
 #include "malloc.h"
 
+void show_alloc_mem_tiny(void) {
+	t_zone *curr_zone = g_zones.tiny_zones;
+	while (curr_zone) {
+		ft_printf("TINY : %p\n", curr_zone);
+		t_block *curr_block = curr_zone->head;
+		while (curr_block) {
+			if (curr_block->free == 0) {
+				ft_printf("%p - %p : %d bytes\n", (char *)curr_block + sizeof(t_block), (char *)curr_block + sizeof(t_block) + curr_block->size, curr_block->size);
+			}
+			curr_block = curr_block->next;
+		}
+		curr_zone = curr_zone->next;
+	}
+}
+
+void show_alloc_mem_small(void) {
+	t_zone *curr_zone = g_zones.small_zones;
+	while (curr_zone) {
+		ft_printf("SMALL: %p\n", curr_zone);
+		t_block *curr_block = curr_zone->head;
+		while (curr_block) {
+			if (curr_block->free == 0) {
+				ft_printf("%p - %p : %d bytes\n", (char *)curr_block + sizeof(t_block), (char *)curr_block + sizeof(t_block) + curr_block->size, curr_block->size);
+			}
+			curr_block = curr_block->next;
+		}
+		curr_zone = curr_zone->next;
+	}
+}
+
+void show_alloc_mem_large(void) {
+	t_block *curr_block = g_zones.large_blocks;
+	while (curr_block) {
+		ft_printf("LARGE: %p\n", (char *)curr_block - 8);
+		ft_printf("%p - %p : %d bytes\n", (char *)curr_block + sizeof(t_block), (char *)curr_block + sizeof(t_block) + curr_block->size, curr_block->size);
+		curr_block = curr_block->next;
+	}
+}
+
 void show_alloc_mem(void) {
+	show_alloc_mem_tiny();
+	show_alloc_mem_small();
+	show_alloc_mem_large();
 }
 
 void show_alloc_mem_ex(void) {
@@ -8,7 +50,7 @@ void show_alloc_mem_ex(void) {
 
 void show_alloc_sizes(void) {
 	// TODO remove me (printf)
-	printf("PAGESIZE : %zu bytes\n", g_zones.pagesize);
-	printf("TINY ZONE MAX BLOCK SIZE: %zu bytes\n", g_zones.tiny_block_max_size);
-	printf("SMALL ZONE MAX BLOCK SIZE : %zu bytes\n", g_zones.small_block_max_size);
+	ft_printf("PAGESIZE : %d bytes\n", g_zones.pagesize);
+	ft_printf("TINY ZONE MAX BLOCK SIZE: %d bytes\n", g_zones.tiny_block_max_size);
+	ft_printf("SMALL ZONE MAX BLOCK SIZE : %d bytes\n", g_zones.small_block_max_size);
 }