diff --git a/Homework/Hanoi Towers/app b/Homework/Hanoi Towers/app
index fead186..a38a949 100755
Binary files a/Homework/Hanoi Towers/app and b/Homework/Hanoi Towers/app differ
diff --git a/Homework/Hanoi Towers/func.c b/Homework/Hanoi Towers/func.c
index caa4f0e..7d417bc 100644
--- a/Homework/Hanoi Towers/func.c	
+++ b/Homework/Hanoi Towers/func.c	
@@ -5,7 +5,9 @@
 #include <time.h>
 #include <string.h>
 
-void pr(tower *tmp)
+#define max(x, y) (((x) > (y)) ? (x) : (y))
+
+void pr(node *tmp)
 {
     if (tmp == NULL)
     {
@@ -14,63 +16,52 @@ void pr(tower *tmp)
     }
     while (tmp)
     {
-        printf("[%14p]<-[%14p]->[%14p] ", tmp->prev, tmp, tmp->next);
-        printf("data: [%4ld] s[%s]\n", tmp->data, tmp->s);
+        printf("[%14p]->[%14p] ", tmp, tmp->next);
+        printf("size: [%4d]\n", tmp->size);
         tmp = tmp->next;
     }
     printf("-------------\n");
 }
-tower *add_head(tower *crown, int hh)
+node *add_head(node *head, int hh)
 {
-    tower *tmp = NULL;
-    int i;
-    if ((tmp = malloc(sizeof(tower))) == NULL)
+    node *tmp = NULL;
+    if ((tmp = malloc(sizeof(node))) == NULL)
     {
         perror("malloc: NULL");
         exit(2);
     }
-    tmp->prev = NULL;
-    tmp->data = hh;
-    for (i = 0; i < N - 1; i++)
-        tmp->s[i] = ((char)(65 + rand() % 25));
-    tmp->s[N - 1] = '\0';
-    if (crown == NULL)
+    tmp->size = hh;
+    if (head == NULL)
         tmp->next = NULL;
     else
     {
-        tmp->next = crown;
-        crown->prev = tmp;
+        tmp->next = head;
     }
     return tmp;
 }
-tower *del_head(tower *crown)
+node *del_head(node *head)
 {
-    tower *tmp = crown;
-    if (crown == NULL)
+    node *tmp = head;
+    if (head == NULL)
         return NULL;
-    if (crown->next == NULL)
+    if (head->next == NULL)
     {
-        free(crown);
+        free(head);
         return NULL;
     }
-    crown = crown->next;
-    crown->prev = NULL;
+    head = head->next;
     free(tmp);
-    return crown;
+    return head;
 }
 
-int length(tower *list)
+int length(node *list)
 {
-    tower *tmp = list;
+    node *tmp = list;
     int res = 0;
-    if (list == NULL)
-        return 0;
-    if (list->data == 0 && !strcmp(list->s, "\0"))
+    if (list == NULL || list->size == 0)
         return 0;
     else
     {
-        while (tmp->prev != NULL)
-            tmp = tmp->prev;
         while (tmp != NULL)
         {
             res++;
@@ -80,41 +71,18 @@ int length(tower *list)
     return res;
 }
 
-tower *adv_add_head(tower *crown, int hh, char string[])
+void swap(node *a, node *b)
 {
-    tower *tmp = NULL;
-    if ((tmp = malloc(sizeof(tower))) == NULL)
-    {
-        perror("malloc: NULL");
-        exit(2);
-    }
-    tmp->prev = NULL;
-    tmp->data = hh;
-    memcpy(tmp->s, string, N);
-    if (crown == NULL)
-        tmp->next = NULL;
-    else
-    {
-        tmp->next = crown;
-        crown->prev = tmp;
-    }
-    return tmp;
-}
-void swap(tower *a, tower *b)
-{
-    tower *tmp = NULL;
-    if ((tmp = malloc(sizeof(tower))) == NULL)
+    node *tmp = NULL;
+    if ((tmp = malloc(sizeof(node))) == NULL)
         exit(1);
-    tmp->data = a->data;
-    a->data = b->data;
-    b->data = tmp->data;
-    memcpy(tmp->s, a->s, N);
-    memcpy(a->s, b->s, N);
-    memcpy(b->s, tmp->s, N);
+    tmp->size = a->size;
+    a->size = b->size;
+    b->size = tmp->size;
     free(tmp);
 }
 
-tower *get(tower *list, int n)
+node *get(node *list, int n)
 {
     if (n >= length(list))
         exit(3);
@@ -124,73 +92,101 @@ tower *get(tower *list, int n)
     return list;
 }
 
-tower *sort(tower *crown)
+node *sort(node *head)
 {
-    if (crown == NULL || crown->next == NULL)
-        return crown;
-    int i, j, n = length(crown);
+    if (head == NULL || head->next == NULL)
+        return head;
+    int i, j, n = length(head);
     for (i = 0; i < n - 1; i++)
     {
         for (j = i + 1; j < n; j++)
         {
-            if (get(crown, j)->data < get(crown, i)->data)
-                swap(get(crown, i), get(crown, j));
+            if (get(head, j)->size < get(head, i)->size)
+                swap(get(head, i), get(head, j));
         }
     }
-    return crown;
+    return head;
 }
-tower *printextra(tower *crown, int len, int i)
+pointer *add_head_address(pointer *head, node **address)
 {
-    if (len < i || len == 0)
+    pointer *tmp = NULL;
+    if ((tmp = malloc(sizeof(pointer))) == NULL)
     {
-        printf("*********************************|");
-        return crown;
+        perror("malloc: NULL");
+        exit(2);
     }
+    tmp->address = address;
+    if (head == NULL)
+        tmp->next = NULL;
     else
     {
-        printf("[%14p] data: [%4ld] s[%s]|", crown, crown->data, crown->s);
-        return crown->prev;
+        tmp->next = head;
     }
-}
-tower *end(tower *crown)
-{
-    tower *tmp = NULL;
-    tmp = crown;
-    if (crown == NULL)
-        return crown;
-    while (tmp->next != NULL)
-        tmp = tmp->next;
     return tmp;
 }
 
-void printftof(tower *head1, tower *head2, tower *head3)
+node *printextra(node *head, int len, int i)
 {
-    int a = length(head1), b = length(head2), c = length(head3), maximum, i;
-    maximum = max(a, b);
-    maximum = max(maximum, c);
-    head1 = end(head1);
-    head2 = end(head2);
-    head3 = end(head3);
-    for (i = maximum; i > 0; i--)
+    if (len < i || len == 0)
+    {
+        for (i = 0; i < T - 1; i++)
+            printf(" ");
+        printf("|");
+        return head;
+    }
+    else
+    {
+        disk(head->size);
+        printf("|");
+        return head->next;
+    }
+}
+
+void prcount(char s, int n)
+{
+    int i;
+    for (i = 0; i < n; i++)
+    {
+        printf("%c", s);
+    }
+}
+void disk(int size)
+{
+    int i;
+    prcount(' ', T / 2 - size);
+    for (i = 0; i < size - 1; i++)
+    {
+        printf("* ");
+    }
+    printf("*");
+    prcount(' ', T / 2 - size);
+}
+void printftof(pointer *adresses)
+{
+    node *head1 = *(adresses->address), *head2 = *(adresses->next->address), *head3 = *(adresses->next->next->address);
+    int a = length(head1), b = length(head2), c = length(head3), i; // maximum
+    // maximum = max(max(a, b), c);
+    for (i = T / 2; i > 0; i--)
     {
         head1 = printextra(head1, a, i);
         head2 = printextra(head2, b, i);
         head3 = printextra(head3, c, i);
         printf("\n");
     }
-    printf("----------------------------------------------------------------------------------------------------------\n");
-    printf("Tower 1                           |Tower 2                           |Tower 3                           |\n");
-    printf("----------------------------------------------------------------------------------------------------------\n\n");
-}
-int max(int a, int b)
-{
-    if (a < b)
-        return b;
-    else
-        return a;
+    prcount('-', 3 * T);
+    printf("\n");
+    printf("Tower 1");
+    prcount(' ', T - 8);
+    printf("|Tower 2");
+    prcount(' ', T - 8);
+    printf("|Tower 3");
+    prcount(' ', T - 8);
+    printf("|\n");
+    prcount('-', 3 * T);
+    printf("\n");
 }
 
-void hanoi_tower(int n, tower **head_from, tower **head_to, tower **head_aux, tower **const tower1, tower **const tower2, tower **const tower3)
+void hanoi_tower(int n, node **head_from, node **head_to, node **head_aux, pointer *adresses)
 {
     if (n == 0)
     {
@@ -200,17 +196,17 @@ void hanoi_tower(int n, tower **head_from, tower **head_to, tower **head_aux, to
     else if (n == 1)
     {
         if (length(*head_to) == 0)
-            printftof(*tower1, *tower2, *tower3);
-        *head_to = adv_add_head(*head_to, (*head_from)->data, (*head_from)->s);
+            printftof(adresses);
+        *head_to = add_head(*head_to, (*head_from)->size);
         *head_from = del_head(*head_from);
         if (length(*head_from) == 0)
-            printftof(*tower1, *tower2, *tower3);
+            printftof(adresses);
         return;
     }
-    hanoi_tower(n - 1, head_from, head_aux, head_to, tower1, tower2, tower3);
-    printftof(*tower1, *tower2, *tower3);
-    *head_to = adv_add_head(*head_to, (*head_from)->data, (*head_from)->s);
+    hanoi_tower(n - 1, head_from, head_aux, head_to, adresses);
+    printftof(adresses);
+    *head_to = add_head(*head_to, (*head_from)->size);
     *head_from = del_head(*head_from);
-    printftof(*tower1, *tower2, *tower3);
-    hanoi_tower(n - 1, head_aux, head_to, head_from, tower1, tower2, tower3);
+    printftof(adresses);
+    hanoi_tower(n - 1, head_aux, head_to, head_from, adresses);
 }
\ No newline at end of file
diff --git a/Homework/Hanoi Towers/main.c b/Homework/Hanoi Towers/main.c
index 7a22596..5c056f6 100644
--- a/Homework/Hanoi Towers/main.c	
+++ b/Homework/Hanoi Towers/main.c	
@@ -1,28 +1,35 @@
 #include "prot.h"
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <stdlib.h>
 
 int main(int argc, char *argv[])
 {
 
-    tower *crown1 = NULL, *crown2 = NULL, *crown3 = NULL;
+    node *head = NULL, *head2 = NULL, *head3 = NULL;
+    pointer *addresses = NULL;
     int r;
 
     srand(time(NULL));
 
-    printf("Generated linked list (method of crown1)\n");
-    while ((r = (rand() % 100)) < 75)
-        crown1 = add_head(crown1, r);
-    pr(crown1);
-
-    printf("Length of linked list is: %d\n", length(crown1));
-
+    printf("Generated linked list (method of head)\n");
+    /*while ((r=(rand()%T)) < T/2){
+        if (r==0) r+=1;
+        head = add_head(head, r);
+    }*/
+    for (r = 1; r <= T / 2; r++)
+    {
+        head = add_head(head, r);
+    }
+    pr(head);
+    printf("Length of linked list is: %d\n", length(head));
     printf("Sorted linked list\n");
-    sort(crown1);
-    pr(crown1);
-
-    hanoi_tower(length(crown1), &crown1, &crown3, &crown2, &crown1, &crown2, &crown3);
+    sort(head);
+    pr(head);
+    addresses = add_head_address(addresses, &head3);
+    addresses = add_head_address(addresses, &head2);
+    addresses = add_head_address(addresses, &head);
+    hanoi_tower(length(head), &head, &head3, &head2, addresses);
     return 0;
 }
\ No newline at end of file
diff --git a/Homework/Hanoi Towers/prot.h b/Homework/Hanoi Towers/prot.h
index f63dd86..fd6351b 100644
--- a/Homework/Hanoi Towers/prot.h	
+++ b/Homework/Hanoi Towers/prot.h	
@@ -1,23 +1,27 @@
 #define N 10
+#define T 20
 
 typedef struct Node
 {
-    long int data;
+    int size;
     struct Node *next;
-    struct Node *prev;
-    char s[N];
-} tower;
+} node;
+typedef struct nodepointer
+{
+    struct nodepointer *next;
+    struct Node **address;
+} pointer;
 
-void pr(tower *tmp);
-tower *add_head(tower *crown, int hh);
-tower *del_head(tower *crown);
-int length(tower *list);
-tower *sort(tower *crown);
-tower *get(tower *list, int n);
-void swap(tower *a, tower *b);
-tower *adv_add_head(tower *crown, int hh, char string[]);
-void hanoi_tower(int n, tower **head_from, tower **head_to, tower **head_aux, tower **const tower1, tower **const tower2, tower **const tower3);
-void printftof(tower *head1, tower *head2, tower *head3);
-tower *end(tower *crown);
-tower *printextra(tower *crown, int len, int i);
-int max(int a, int b);
\ No newline at end of file
+void pr(node *tmp);
+node *add_head(node *head, int hh);
+node *del_head(node *head);
+pointer *add_head_address(pointer *head, node **address);
+int length(node *list);
+node *sort(node *head);
+node *get(node *list, int n);
+void swap(node *a, node *b);
+void hanoi_tower(int n, node **head_from, node **head_to, node **head_aux, pointer *adresses);
+void printftof(pointer *adresses);
+node *printextra(node *head, int len, int i);
+void disk(int size);
+void prcount(char s, int n);
\ No newline at end of file
diff --git a/Homework/Trees/app b/Homework/Trees/app
index 1e04fb2..ac9d580 100755
Binary files a/Homework/Trees/app and b/Homework/Trees/app differ
diff --git a/Homework/bintreeCalk/func.c b/Homework/bintreeCalk/func.c
new file mode 100644
index 0000000..eb1c4a0
--- /dev/null
+++ b/Homework/bintreeCalk/func.c
@@ -0,0 +1,312 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <time.h>
+#include <error.h>
+#include "head.h"
+
+Tree *tnew(void)
+{
+    Tree *tmp;
+    if ((tmp = malloc(sizeof(Tree))) == NULL)
+    {
+        perror("malloc:");
+        exit(1);
+    }
+    tmp->key = 0;
+    tmp->left = NULL;
+    tmp->right = NULL;
+    return tmp;
+}
+
+Tree *leaf(char c)
+{
+    Tree *tmp;
+    tmp = tnew();
+    tmp->key = c;
+    return tmp;
+}
+
+Tree *maketree(char expr[], int first, int last)
+{
+    Tree *root;
+    int k;
+
+    if (first == last)
+    {
+        return leaf(expr[first]);
+    }
+
+    k = lastop(expr, first, last);
+    root = tnew();
+    root->key = expr[k];
+    root->left = maketree(expr, first, k - 1);
+    root->right = maketree(expr, k + 1, last);
+    return root;
+}
+
+unsigned char priority(char c)
+{
+    if ((c - '0' >= 0) && (c - '0' <= 9))
+    {
+        return MPRT;
+    }
+    switch (c)
+    {
+    case '+':
+    case '-':
+        return 1;
+    case '*':
+    case '/':
+        return 2;
+    case '^':
+        return 3;
+    }
+    return c;
+}
+
+int lastop(char expr[], int first, int last)
+{
+    unsigned char min, prt;
+    int i, k;
+    min = MPRT;
+    for (i = first; i <= last; i++)
+    {
+        prt = priority(expr[i]);
+        if (prt <= min)
+        {
+            min = prt;
+            k = i;
+        }
+    }
+    return k;
+}
+
+int calculate(Tree *root)
+{
+    int num1, num2;
+    if (!(root->left))
+    {
+        return root->key - 0x30;
+    }
+    num1 = calculate(root->left);
+    num2 = calculate(root->right);
+    switch (root->key)
+    {
+    case '+':
+        return num1 + num2;
+    case '-':
+        return num1 - num2;
+    case '*':
+        return num1 * num2;
+    case '/':
+        return num1 / num2;
+    case '^':
+        return pow(num1, num2);
+    }
+    return 0xffffffff;
+}
+
+void showtree(Tree *root, int level)
+{
+    if ((root->key > 31) && (root->key < 127))
+    {
+        printf("%c ", root->key);
+    }
+    else
+    {
+        printf("%X ", root->key);
+    }
+
+    if (root->right)
+    {
+        printf("------> ");
+        level++;
+        showtree(root->right, level);
+        level--;
+    }
+    if (root->left)
+    {
+        int i = 0;
+
+        printf("\n");
+        for (i = 0; i < level; i++)
+        {
+            printf("          ");
+        }
+        printf("| \n");
+
+        for (i = 0; i < level; i++)
+        {
+            printf("          ");
+        }
+        showtree(root->left, level);
+    }
+}
+
+Tree *create(unsigned char key)
+{
+    Tree *tmp;
+    if ((tmp = malloc(sizeof(Tree))) == NULL)
+    {
+        perror("malloc:");
+        exit(1);
+    }
+    tmp->key = key;
+    tmp->parent = NULL;
+    tmp->left = NULL;
+    tmp->right = NULL;
+    return tmp;
+}
+
+Tree *add(Tree *root, unsigned char key)
+{
+    Tree *rtmp = root, *rsave = NULL, *tmp;
+    if ((tmp = malloc(sizeof(Tree))) == NULL)
+    {
+        perror("malloc:");
+        exit(1);
+    }
+    while (rtmp)
+    {
+        rsave = rtmp;
+        if (key < rtmp->key)
+        {
+            rtmp = rtmp->left;
+        }
+        else if (key > rtmp->key)
+        {
+            rtmp = rtmp->right;
+        }
+        else
+        {
+            printf("\n There is element %c \n", key);
+            return root;
+        }
+    }
+    tmp->parent = rsave;
+    tmp->left = NULL;
+    tmp->right = NULL;
+    tmp->key = key;
+    if (key < rsave->key)
+    {
+        rsave->left = tmp;
+    }
+    else
+    {
+        rsave->right = tmp;
+    }
+    return root;
+}
+
+Tree *search(Tree *root, unsigned char key)
+{
+    if ((root == NULL) || (root->key == key))
+    {
+        return root;
+    }
+    if (key < root->key)
+    {
+        return search(root->left, key);
+    }
+    else if (key > root->key)
+    {
+        return search(root->right, key);
+    }
+}
+
+Tree *min(Tree *root)
+{
+    while (root->left != NULL)
+    {
+        root = root->left;
+    }
+    return root;
+}
+Tree *max(Tree *root)
+{
+    while (root->right != NULL)
+    {
+        root = root->right;
+    }
+    return root;
+}
+
+Tree *nextdel(Tree *root)
+{
+    Tree *l = NULL;
+    if (root->right != NULL)
+    {
+        return min(root->right);
+    }
+    l = root->parent;
+    while ((l != NULL) && (root == l->right))
+    {
+        root = l;
+        l = l->parent;
+    }
+    return l;
+}
+
+void delete(Tree *del)
+{
+    Tree *tmp;
+    if (del == NULL)
+    {
+        printf("\n no such elem \n");
+        return;
+    }
+    if ((del->left == NULL) && (del->right == NULL))
+    {
+        if (del == del->parent->right)
+        {
+            del->parent->right = NULL;
+        }
+        else
+        {
+            del->parent->right = NULL;
+        }
+        free(del);
+        return;
+    }
+
+    if ((del->left == NULL) && (del->right != NULL))
+    {
+        if (del == del->parent->right)
+        {
+            del->parent->right = del->right;
+            del->parent->right->parent = del->parent;
+        }
+        else
+        {
+            del->parent->left = del->right;
+            del->parent->left->parent = del->parent;
+        }
+        free(del);
+        return;
+    }
+
+    if ((del->left != NULL) && (del->right == NULL))
+    {
+        if (del == del->parent->right)
+        {
+            del->parent->right = del->left;
+            del->parent->right->parent = del->parent;
+        }
+        else
+        {
+            del->parent->left = del->left;
+            del->parent->left->parent = del->parent;
+        }
+        free(del);
+        return;
+    }
+
+    if ((del->left != NULL) && (del->right != NULL))
+    {
+        tmp = min(del->right);
+        del->key = tmp->key;
+        delete (tmp);
+    }
+}
diff --git a/Homework/bintreeCalk/head.h b/Homework/bintreeCalk/head.h
new file mode 100644
index 0000000..19448bb
--- /dev/null
+++ b/Homework/bintreeCalk/head.h
@@ -0,0 +1,10 @@
+#define MPRT 255
+#define SIZE 80
+
+typedef struct tree
+{
+    unsigned char key;
+    struct tree *parent;
+    struct tree *left;
+    struct tree *right;
+} Tree;
diff --git a/Homework/bintreeCalk/main.c b/Homework/bintreeCalk/main.c
new file mode 100644
index 0000000..27774da
--- /dev/null
+++ b/Homework/bintreeCalk/main.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <time.h>
+#include <error.h>
+#include "head.h"
+
+int main(int argc, char *argv[])
+{
+    char s[SIZE];
+    Tree *tree = NULL;
+    if (argc < 2)
+    {
+        printf("no expression\n");
+        return 2;
+    }
+    strcpy(s, argv[1]);
+    printf("processing %s\n", s);
+    tree = maketree(s, 0, strlen(s) - 1);
+
+    printf("\n tree: \n");
+    showtree(tree, 0);
+
+    printf("= %d \n", calculate(tree));
+    return 0;
+}
\ No newline at end of file