poj2509---抽k根烟就换一支，求能抽烟的总数

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int now,k;
    while(scanf("%d %d",&now,&k) != EOF)
    {
        int hav=;
        while(now >= k)
        {
            hav +=   now/k*k;
            now = now/k + now%k;
        }
        hav += now;
        printf("%d\n",hav);
    }
    return ;
}

算法思路：目前有几支烟就放进now中，把now看成一个整体，now对k取余和取商，商即为k支烟为大小的整体有多少个，一次就have掉now/k*k

now=now/k+now%k