diff --git a/2016/puzzle-23-01.cc b/2016/puzzle-23-01.cc
index 6183d83..c21189f 100644
--- a/2016/puzzle-23-01.cc
+++ b/2016/puzzle-23-01.cc
@@ -3,6 +3,7 @@
 //
 
 #include <array>
+#include <cassert>
 #include <iostream>
 #include <string>
 #include <variant>
diff --git a/2016/puzzle-23-02.cc b/2016/puzzle-23-02.cc
index 0a28376..7d2301a 100644
--- a/2016/puzzle-23-02.cc
+++ b/2016/puzzle-23-02.cc
@@ -3,6 +3,7 @@
 //
 
 #include <array>
+#include <cassert>
 #include <iostream>
 #include <string>
 #include <utility>
@@ -191,9 +192,8 @@ private:
   void set(Operand const& dest, Int value)
   {
     if (std::holds_alternative<Register>(dest)) {
-      registers_[// NOLINT(cppcoreguidelines-pro-bounds-constant-array-index)
-        static_cast<unsigned>(std::get<Register>(dest))] =
-        value;
+      registers_[  // NOLINT(cppcoreguidelines-pro-bounds-constant-array-index)
+        static_cast<unsigned>(std::get<Register>(dest))] = value;
     }
   }
 
diff --git a/2021/puzzle-13-01.cc b/2021/puzzle-13-01.cc
index 4460cde..34598d1 100644
--- a/2021/puzzle-13-01.cc
+++ b/2021/puzzle-13-01.cc
@@ -3,6 +3,7 @@
 //
 
 #include <iostream>
+#include <numeric>
 #include <regex>
 #include <set>
 #include <string>
diff --git a/2021/puzzle-13-02.cc b/2021/puzzle-13-02.cc
index 9259e4a..bec0871 100644
--- a/2021/puzzle-13-02.cc
+++ b/2021/puzzle-13-02.cc
@@ -3,6 +3,7 @@
 //
 
 #include <iostream>
+#include <numeric>
 #include <regex>
 #include <set>
 #include <string>