diff --git a/u01/node.cpp b/u01/node.cpp
index 3f0e0c0..ece43ab 100644
--- a/u01/node.cpp
+++ b/u01/node.cpp
@@ -65,7 +65,7 @@ std::string node::print_recursive(unsigned int depth,
 std::string node::print_iterative() const {
   std::stringstream output;
   std::stack<std::pair<const node *, unsigned int>> stack;
-  stack.push(std::make_pair(this, 0));
+  stack.push({this, 0});
   std::set<const node *> visited = {};
 
   while (!stack.empty()) {
@@ -81,7 +81,7 @@ std::string node::print_iterative() const {
       // to achieve the same output as the recursive approach.
       // Otherwise, the order of the children is reversed (due to LIFO).
       for (std::size_t i = n->get_nr_children(); i > 0; i--) {
-        stack.push(std::make_pair(n->get_child(i - 1), depth + 1));
+        stack.push({n->get_child(i - 1), depth + 1});
       }
     } else {
       output << " [↝ " << n->get_name() << "]";