#include using namespace std; typedef long long int ll; typedef pair P; typedef vector VI; typedef vector VVI; const ll MOD = 1000000007; const ll INF = 1e18; #define REP(i, n) for(int i = 0; i < n; i++) #define ALL(v) v.begin(), v.end() int main(){ ll a; cin >> a; ll ans=INF; for(int k=2;k<=3;k++){ int c=0; long double p=1; for(ll i=1;i