#include<bits/stdc++.h> using namespace std; const double PI=acos(-1); #define int long long #define double long double #define endl '\n' #define sqrt sqrtl #define rep(i,a,b) for(int i=a;i<=b;i++) int gcd (int a ,int b){ return b ? gcd ( b , a % b ) :a; } const int N=205; double f[N][...