diff --git a/9_tree_algorithms/subordinates.cpp b/9_tree_algorithms/subordinates.cpp
new file mode 100644
index 0000000..565b021
--- /dev/null
+++ b/9_tree_algorithms/subordinates.cpp
@@ -0,0 +1,45 @@
+#include <iostream>
+#include <vector>
+
+using namespace std;
+
+int n;
+vector<vector<int>> adj;
+vector<int> subordinates;
+
+int dfs(int u) {
+    int current_subtree_size = 1;
+
+    for (int v : adj[u]) {
+        current_subtree_size += dfs(v);
+    }
+
+    subordinates[u] = current_subtree_size - 1;
+
+    return current_subtree_size;
+}
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(NULL);
+
+    cin >> n;
+
+    adj.resize(n + 1);
+    subordinates.resize(n + 1);
+
+    for (int i = 2; i <= n; ++i) {
+        int boss;
+        cin >> boss;
+        adj[boss].push_back(i);
+    }
+
+    dfs(1);
+
+    for (int i = 1; i <= n; ++i) {
+        cout << subordinates[i] << " ";
+    }
+    cout << "\n";
+
+    return 0;
+}
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