upload

2/D.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+
+int main() {
+  int n;
+  std::cin >> n;
+  int* a = new int[n];
+
+  for (int i = 1; i <= n; ++i) {
+    a[i-1] = i;
+  }
+
+  for (int i = 2; i < n; ++i) {
+    std::swap(a[i], a[i/2]);
+  }
+
+  for (int i = 0; i < n; ++i) {
+    std::cout << a[i] << " ";
+  }
+
+  delete[] a;
+  return 0;
+}