灯塔数量

/*
 * 49.cpp
 *
 *  Created on: 2011-8-8
 *      Author: san
 */


# include <stdio.h>


int main(void)
{
int n = 1;
int m;
int sum;
int i;
while (1)
{
m = n;
sum = 0;
for (i=1; i<8; i++)
{
m = m * 2;
sum += m;
}
sum  += n;