.每瓶汽水1元，两个空瓶可以置换一瓶汽水，现在有20元，最多能喝多少瓶汽水

#include<stdio.h>
int main()
{
int n = 20;
int count = 20;
int m;
m = n / 1;
while (m)
{
m = m / 2;
if (m == 5)
{
count += m;
m = m / 2;
count += m;
if (m == 2)
{
m = m / 2;
count+=m;
m = (m + 1) / 2;
m = m + 1;
count += m;
break;

}

}
count+=m;
}
printf("%d\n",count);
system("pause");
return 0;
}