diff --git a/a4/program.c b/a4/program.c
index e69de29..2ff26a7 100644
--- a/a4/program.c
+++ b/a4/program.c
@@ -0,0 +1,35 @@
+def is_min_heap(arr):
+    n = len(arr)
+    for i in range(n):
+        l = 2 * i + 1 
+        r = 2 * i + 2  
+        if l < n and arr[i] > arr[l]:
+            return False
+        if r < n and arr[i] > arr[r]:
+            return False
+    return True
+
+def preorder(arr, index, level):
+    if index >= len(arr):
+        return
+    print(' ' * level + str(arr[index]))
+    l = 2 * index + 1
+    r = 2 * index + 2
+    if l < len(arr):
+        preorder(arr, l, level + 1)
+    if r < len(arr):
+        preorder(arr, r, level + 1)
+
+def main():
+    # Načítanie vstupu
+    arr = list(map(int, input().split()))
+    
+    if is_min_heap(arr):
+        print("Je to taka kopa:")
+        preorder(arr, 0, 0)
+    else:
+        print("Nie je kopa.")
+
+
+if __name__ == "__main__":
+    main()