chore: initial commit

cpp/.gitignore

@@ -0,0 +1 @@
+a

cpp/a.cpp

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+#include <iostream>
+
+#pragma GCC optimize("O3")
+#pragma GCC optimize("Ofast")
+#pragma GCC optimization("unroll-loops")
+
+using namespace std;
+
+int main()
+{
+    cout << "Hello, C++!\n";
+}

cpp/cpp.justfile

@@ -0,0 +1,8 @@
+@build-cpp:
+    g++ ./cpp/a.cpp -o ./cpp/a
+
+@run-cpp: build-cpp
+    ./cpp/a < ./input.txt
+
+@bench-cpp: build-cpp
+    hyperfine './cpp/a < ./input.txt'