#include <iostream> #include <vector> #include <cmath> #include <map> #include <set> #include <iomanip> #include <queue> #include <algorithm> #include <numeric> #include <deque> #include <complex> #include <cassert> using namespace std; using ll = long long; int main(){ int N; cin >> N; if (N >= 200){ cout << 1 << endl; return 0; } long double P, Q=1; cin >> P; for (int i=0; i<N; i++) Q *= (1.l-P); cout << setprecision(18) << 1-Q << endl; return 0; }