#include <iostream> #include <iomanip> #include <cmath> #include <math.h> using namespace std; int main() { int i=0; double n=0; int m=0; int count=0; while(cin>>n>>m) { if(count) { cout<<endl; } count=1; double ans=0; double b=n; for(i=0;i<m;i++) { b=(double)pow(n,0.5); ans+=(double)n; n=b; } cout.setf(ios::fixed); cout<<setprecision(2)<<ans; } return 0; }