diff --git a/puzzles/interviews/training/binary_tree_max_path.cpp b/puzzles/interviews/training/binary_tree_max_path.cpp
new file mode 100644
index 0000000..d356113
--- /dev/null
+++ b/puzzles/interviews/training/binary_tree_max_path.cpp
@@ -0,0 +1,57 @@
+/*
+VIM: let b:lcppflags="-std=c++14 -O2 -pthread -I."
+VIM: let b:wcppflags="/O2 /EHsc /DWIN32"
+VIM-: let b:cppflags=g:Iboost.g:Itbb
+VIM-: let b:ldflags=g:Lboost.g:Ltbb
+VIM-: let b:ldlibpath=g:Bboost.g:Btbb
+VIM-: let b:argv=""
+*/
+#include <iostream>
+#include <exception>
+#include <chrono>
+#include <algorithm>
+
+struct node
+{
+    node * left;
+    node * right;
+    int value;
+};
+
+long long max_value_of_path_sum( node * root )
+{
+    if ( !root ) {
+        return 0;
+    }
+
+    auto lm = max_value_of_path_sum( root->left );
+    auto rm = max_value_of_path_sum( root->right );
+
+    return root->value + std::max(lm, rm);
+}
+
+int main ( void )
+{try{
+    auto begin = std::chrono::high_resolution_clock::now();
+
+
+    //......
+
+    auto end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> seconds = end - begin;
+    std::cout << "Time: " << seconds.count() << std::endl;
+    return 0;
+}
+catch ( const std::exception& e )
+{
+    std::cerr << std::endl
+            << "std::exception(\"" << e.what() << "\")." << std::endl;
+    return 2;
+}
+catch ( ... )
+{
+    std::cerr  << std::endl
+            << "unknown exception." << std::endl;
+    return 1;
+}}
+