HDU 5933/思维

题目链接[http://acm.hdu.edu.cn/showproblem.php?pid=5933];

题意:

  给出n堆物品,问能不能分成K个数量相等的堆,如果能分,则最少次数是多少。分的规则为:1、将一个堆分成相邻的两个堆。2、将相邻的两个堆合并。Power oj 。均分纸牌。

#include<bits/stdc++.h>
const int maxn = 1e5+50;
typedef long long LL;
LL T,n,k;
LL a[maxn];
int main ()
{
    int ic = 0;
    scanf("%lld",&T);
    while(T--)
    {
        LL sum = 0,ans = 0;
        scanf("%lld%lld",&n,&k);
        for(int i = 1;i <= n;i++)
        {
            scanf("%lld",&a[i]);
            sum += a[i];
        }
        if(sum % k)
        {
           printf("Case #%d: -1\n",++ic);
        }
        else
        {
            sum /= k;
            for(int i = 1;i <= n;i++)
            {
                if(a[i]==sum||!a[i])
                    continue;
                if(a[i]>sum)
                {
                    ans++;
                    a[i]-=sum;
                    i--;
                }
                else
                {
                    a[i+1]+=a[i];
                    a[i]=0;
                    ans++;
                }
            }
            printf("Case #%d: %lld\n",++ic,ans);
        }
        
    }
    return 0;
}

 

posted @ 2016-12-17 20:29  _Mickey  阅读(292)  评论(0编辑  收藏  举报