#include <iostream> #include <cmath> using namespace std; int n, h; double s; int main() { cin >> n; while (cin >> h >> n) { s = h; while (--n) s += pow(0.5, n - 1) * h; printf("%.2f\n", s); } return 0; }  

#include<iostream> #include<cstdio> #include<cmath> using namespace std; double fun(int n) { if (n == 1) return 1; else return fun(n-1)+1/pow(2, n-2); } int main() { int m; cin >> m; while (m--) { int H, n; cin >> H >> n; prin...