HDU2009 求数列的和

#include <stdio.h>#include <math.h>intmain(int argc, char **argv) {    int n, m;    double sum;    double temp;    while (scanf("%d%d", &n, &m) == 2) {        sum = 0.0;        temp = n;        while (m--) {            sum += temp;            temp = sqrt(temp);        }        printf("%.2lf\n", sum);    }    return 0;}