diff --git a/du5/program.c b/du5/program.c
new file mode 100644
index 0000000..445fe69
--- /dev/null
+++ b/du5/program.c
@@ -0,0 +1,120 @@
+#include <stdio.h>
+#include <string.h>
+ 
+#define MAX_NODES 1000
+#define MAX_LEN   256
+ 
+typedef struct {
+    char text[MAX_LEN];
+    int  is_answer;
+    int  yes_child;
+    int  no_child;
+} Node;
+ 
+static Node nodes[MAX_NODES];
+static int  node_count = 0;
+ 
+static char lines[MAX_NODES][MAX_LEN];
+static int  line_count = 0;
+static int  line_pos   = 0;
+ 
+static int parse_node(void)
+{
+    if (line_pos >= line_count) return -1;
+    if (node_count >= MAX_NODES) return -1;
+ 
+    char *line = lines[line_pos++];
+    int   idx  = node_count++;
+ 
+    if (line[0] == '*') {
+        nodes[idx].is_answer = 1;
+        nodes[idx].yes_child = -1;
+        nodes[idx].no_child  = -1;
+        int start = 1;
+        if (line[start] == ' ') start++;
+        strncpy(nodes[idx].text, line + start, MAX_LEN - 1);
+        nodes[idx].text[MAX_LEN - 1] = '\0';
+    } else {
+        nodes[idx].is_answer = 0;
+        strncpy(nodes[idx].text, line, MAX_LEN - 1);
+        nodes[idx].text[MAX_LEN - 1] = '\0';
+ 
+        nodes[idx].yes_child = parse_node();
+        nodes[idx].no_child  = parse_node();
+ 
+        if (nodes[idx].yes_child == -1 || nodes[idx].no_child == -1)
+            return -1;
+    }
+    return idx;
+}
+ 
+static void trim_newline(char *s)
+{
+    int len = (int)strlen(s);
+    while (len > 0 && (s[len - 1] == '\n' || s[len - 1] == '\r'))
+        s[--len] = '\0';
+}
+ 
+int main(void)
+{
+    char buf[MAX_LEN];
+    while (fgets(buf, MAX_LEN, stdin)) {
+        trim_newline(buf);
+        if (buf[0] == '\0') break;
+        if (line_count >= MAX_NODES) {
+            printf("Chyba: Baza pravidiel je prilis velka.\n");
+            return 1;
+        }
+        strncpy(lines[line_count++], buf, MAX_LEN - 1);
+    }
+ 
+    if (line_count == 0) {
+        printf("Chyba: Baza pravidiel je prazdna.\n");
+        return 1;
+    }
+ 
+    int root = parse_node();
+ 
+    if (root == -1 || line_pos != line_count) {
+        printf("Chyba: Nepodarilo sa spravne nacitat bazu pravidiel.\n");
+        return 1;
+    }
+ 
+    int answer_count = 0;
+    for (int i = 0; i < node_count; i++)
+        if (nodes[i].is_answer) answer_count++;
+ 
+    printf("Expert z bufetu to vie.\n");
+    printf("Pozna %d druhov ovocia a zeleniny.\n", answer_count);
+    printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
+ 
+    int current = root;
+    while (current != -1) {
+ 
+        if (nodes[current].is_answer) {
+            printf("* %s\n", nodes[current].text);
+            printf("Koniec\n");
+            return 0;
+        }
+ 
+        printf("%s\n", nodes[current].text);
+ 
+        if (!fgets(buf, MAX_LEN, stdin)) {
+            printf("Chyba: Neplatny vstup.\n");
+            return 1;
+        }
+        trim_newline(buf);
+ 
+        if (strcmp(buf, "a") == 0) {
+            current = nodes[current].yes_child;
+        } else if (strcmp(buf, "n") == 0) {
+            current = nodes[current].no_child;
+        } else {
+            printf("Chyba: Neplatny vstup '%s'.\n", buf);
+            return 1;
+        }
+    }
+ 
+    printf("Chyba: Nenasla sa odpoved.\n");
+    return 1;
+}
\ No newline at end of file