#include"stdio.h"#include"math.h" int main(void){	double m, n;		while(scanf("%lf%lf", &n, &m) != EOF){		double sum, x;		sum = n;			int i;		for(i=1; i<m; i++){			n = sqrt(n);			sum += n;		}				printf("%.2lf\n", sum);	}	return 0;}