#include <bits/stdc++.h> using namespace std;

int main() { int a, b; double c = 1.0; cin >> a >> b; for (int i = 1; i <= b; i++) { c = (c + a * 1.0 / c) / 2; } printf("%.3lf", c); return 0; }

#include <bits/stdc++.h> using namespace std;

int main() { double x, n, s = 1.0; cin >> x >> n; for (int i = 1; i <= n; i++) { s = (s + x / s) / 2; } cout << fixed << setprecision(3) << s; return 0; }

#include <bits/stdc++.h>

using namespace std; int a[25005], b[25005];

int main() { double x, n, a = 1.0; cin >> x >> n; for (int i = 1; i <= n; i++) { a = (a + x / a) / 2; }

cout << fixed << setprecision(3) << a;
return 0;

}