diff --git a/du5/program.c b/du5/program.c
new file mode 100644
index 0000000..ce1ac91
--- /dev/null
+++ b/du5/program.c
@@ -0,0 +1,109 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct Node {
+    char text[256];
+    int is_leaf;
+    struct Node* left;
+    struct Node* right;
+} Node;
+
+Node* parse_tree(int* count, int* err) {
+    if (*err) return NULL;
+    char buffer[256];
+    if (!fgets(buffer, sizeof(buffer), stdin)) {
+        *err = 1;
+        return NULL;
+    }
+    
+    buffer[strcspn(buffer, "\r\n")] = '\0';
+
+    if (strlen(buffer) == 0) {
+        *err = 1;
+        return NULL;
+    }
+    
+    Node* node = (Node*)malloc(sizeof(Node));
+    if (!node) {
+        *err = 1;
+        return NULL;
+    }
+    
+    strcpy(node->text, buffer);
+    if (buffer[0] == '*') {
+        node->is_leaf = 1;
+        node->left = NULL;
+        node->right = NULL;
+        (*count)++;
+    } else {
+        node->is_leaf = 0;
+        node->left = parse_tree(count, err);
+        node->right = parse_tree(count, err);
+    }
+    return node;
+}
+
+void free_tree(Node* root) {
+    if (!root) return;
+    free_tree(root->left);
+    free_tree(root->right);
+    free(root);
+}
+
+int main() {
+    int count = 0;
+    int err = 0;
+    Node* root = parse_tree(&count, &err);
+    
+    if (err || root == NULL) {
+        printf("Chyba pri nacitani bazy pravidiel.\n");
+        free_tree(root);
+        return 0;
+    }
+
+    char buffer[256];
+    if (!fgets(buffer, sizeof(buffer), stdin)) {
+        printf("Chyba pri nacitani bazy pravidiel.\n");
+        free_tree(root);
+        return 0;
+    }
+    buffer[strcspn(buffer, "\r\n")] = '\0';
+    if (strlen(buffer) != 0) {
+        printf("Chyba pri nacitani bazy pravidiel.\n");
+        free_tree(root);
+        return 0;
+    }
+    
+    printf("Expert z bufetu to vie.\n");
+    printf("Pozna %d druhov ovocia a zeleniny.\n", count);
+    printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
+    
+    Node* current = root;
+    while (current != NULL) {
+        printf("%s\n", current->text);
+        if (current->is_leaf) {
+            printf("Koniec\n");
+            break;
+        }
+        
+        char ans[256];
+        if (!fgets(ans, sizeof(ans), stdin)) {
+             printf("Nespravny vstup.\nKoniec\n");
+             break;
+        }
+        ans[strcspn(ans, "\r\n")] = '\0';
+        
+        if (strcmp(ans, "a") == 0) {
+            current = current->left;
+        } else if (strcmp(ans, "n") == 0) {
+            current = current->right;
+        } else {
+            printf("Nespravny vstup.\nKoniec\n");
+            break;
+        }
+    }
+    
+    free_tree(root);
+    return 0;
+}