diff --git a/cv8/program.c b/cv8/program.c
index e69de29..828a2a7 100644
--- a/cv8/program.c
+++ b/cv8/program.c
@@ -0,0 +1,139 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+
+#define SIZE 256
+
+struct tree {
+    char v[SIZE];
+    struct tree* left;
+    struct tree* right;
+};
+
+
+struct tree* read_tree(int* counter);
+void destroy_tree(struct tree* tree);
+void print_tree(struct tree* tree, int offset);
+void print_dot(struct tree* node);
+int count_leaves(struct tree* node);
+int count_no_leaves(struct tree* node);
+void knowledge_system(struct tree* node);
+
+struct tree* read_tree(int* counter) {
+    char buffer[SIZE];
+    memset(buffer, 0, SIZE);
+    char* r = fgets(buffer, SIZE, stdin);
+    assert(r);
+
+    struct tree* node = calloc(1, sizeof(struct tree));
+    memcpy(node->v, buffer, SIZE);
+
+    if (buffer[0] != '*') {
+        node->left = read_tree(counter);
+        (*counter)++;
+        node->right = read_tree(counter);
+        (*counter)++;
+    }
+
+    return node;
+}
+
+void destroy_tree(struct tree* tree) {
+    if (tree) {
+        destroy_tree(tree->left);
+          destroy_tree(tree->right);
+        free(tree);
+    }
+}
+
+void print_tree(struct tree* tree, int offset) {
+    for (int i = 0; i < offset; i++) {
+        printf(" ");
+    }
+    printf("%s", tree->v);
+    if (tree->left) {
+        print_tree(tree->left, offset + 3);
+        print_tree(tree->right, offset + 3);
+    }
+}
+
+void print_dot(struct tree* node) {
+    if (node) {
+        print_dot(node->left);
+        printf("%s [label=\"%s\"];\n", node->v, node->v);
+        if (node->left) {
+            printf("%s -> %s;\n", node->v, node->left->v);
+        }
+        if (node->right) {
+            printf("%s -> %s;\n", node->v, node->right->v);
+        }
+        print_dot(node->right);
+    }
+    printf("}\n");
+}
+
+int count_leaves(struct tree* node) {
+    if (node == NULL) {
+        return 0;
+    }
+    if (node->left == NULL && node->right == NULL) {
+        return 1;
+    }
+    return count_leaves(node->left) + count_leaves(node->right);
+}
+
+int count_no_leaves(struct tree* node) {
+    if (node == NULL || (node->left == NULL && node->right == NULL)) {
+        return 0;
+    }
+  }
+    return 1 + count_n_leaves(node->left) + count_n_leaves(node->right);
+}
+
+void knowledge_system(struct tree* node) {
+    if (node == NULL) {
+        return;
+    }
+
+    printf("%s", node->value);
+    if (node->left == NULL && node->right == NULL) {
+        printf("Koniec\n");
+        return;
+    }
+
+    printf("\nOdpovedajte 'a' alebo 'n'\n");
+
+    char response;
+    do {
+        printf("%s (a/n) ?\n", node->value);
+        scanf(" %c", &response);
+        if (response != 'a' && response != 'n') {
+            printf("Nespravny vstup\n");
+            return;
+        }
+    } while (response != 'a' && response != 'n');
+
+    if (response == 'a') {
+        knowledge_system(node->left);
+    } else {
+        knowledge_system(node->right);
+    }
+}
+
+int main() {
+    int counter = 0;
+    struct tree* root = read_tree(&counter);
+
+    if (root == NULL) {
+        printf("Chybove hlasenie: Nepodarilo sa nacitat bazu pravidiel.\n");
+        return 1;
+    }
+
+    knowledge_system(root);
+
+    destroy_tree(root);
+
+    return 0;
+}
\ No newline at end of file