1 files changed, 62 insertions, 0 deletions
diff --git a/bin-trees/task19.cpp b/bin-trees/task19.cpp
new file mode 100644
index 0000000..c2f40bb
--- /dev/null
+++ b/bin-trees/task19.cpp
@@ -0,0 +1,62 @@
+#include <iostream>
+#include <string>
+
+#include "tree.h"
+
+using namespace std;
+
+void helper(tree *&t, int *sum, int *cnt)
+{
+    if (!t) return;
+
+    if (t->left == NULL && t->right == NULL)
+    {
+        *sum += t->inf;
+        (*cnt)++;
+    }
+
+    helper(t->left, sum, cnt);
+    helper(t->right, sum, cnt);
+}
+
+float solve(tree *&t)
+{
+    int sum = 0;
+    int cnt = 0;
+    helper(t, &sum, &cnt);
+    return sum * 1.0 / cnt;
+}
+
+void create(tree *&t, int n, tree *parent)
+{
+    if (n > 0)
+    {
+        int x;
+        cin >> x;
+        t = node(x);
+        t->parent = parent;
+        
+        int nl = n / 2;
+        int nr = n - nl - 1;
+
+        create(t->left, nl, t);
+        create(t->right, nr, t);
+    }
+}
+
+int main()
+{
+    int n;
+    cout << "Введите количество узлов: ";
+    cin >> n;
+    tree *t = new tree;
+    cout << "Введите содержимое узлов:" << endl;
+    create(t, n, NULL);
+
+    print(t, log(n) / log(2));
+
+    float res = solve(t);
+    cout << "Среднее арифметическое листьев равно " << res << endl;
+
+    return 0;
+}