URAL 1820. Ural Steaks(数学啊 )

题目链接：http://acm.timus.ru/problem.aspx?

space=1&num=1820

1820. Ural Steaks

Time limit: 0.5 second
Memory limit: 64 MB

After the personal contest, happy but hungry programmers dropped into the restaurant “Ural Steaks” and ordered  n specialty steaks. Each steak is cooked by frying each of its sides on a frying pan for one minute.

Unfortunately, the chef has only one frying pan, on which at most  k steaks can be cooked simultaneously. Find the time the chef needs to cook the steaks.

Input

The only input line contains the integers  n and  k separated with a space (1 ≤  n,  k ≤ 1000).

Output

Output the minimal number of minutes in which the chef can cook  n steaks.

Sample

input	output
3 2	3

PS:

选择尽快先炸掉每块牛排的当中一个面！

对于案例：
第一步：a1, b1;

第二步：c1, a2;

第三步：b2, c2;

代码例如以下：

#include <cstdio>
#include <cstring>

int main()
{
    int n, k;
    while(~scanf("%d%d",&n,&k))
    {
        if(n < k)
        {
            printf("2\n");
            continue;
        }
        int tt = (2*n)%k;
        int ans = 2*n/k;
        if(tt)
        {
            ans+=1;
        }
        printf("%d\n",ans);
    }
    return 0;
}