diff --git a/test.cpp b/test.cpp
new file mode 100644
index 0000000..dd4cb91
--- /dev/null
+++ b/test.cpp
@@ -0,0 +1,32 @@
+// C++
+
+#include <iostream>
+#include <array>
+
+inline int gcd(int a, int b)
+{
+    if (b > 0) return gcd(b, a % b);
+    else return a;
+}
+
+int main()
+{
+    std::cout << "test\n";
+
+    const int N = 1000;
+    std::array<int, N> A;
+    for (int i = 0; i < N; i++)
+    {
+        A[i] = i;
+    }
+
+    int ans = 0;
+    for (int i : A)
+    {
+        for (int j : A)
+        {
+            ans += gcd(i, j);
+        }
+    }
+    std::cout << ans << std::endl;
+}