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优先队列构造前两列....

Backup Plan

5 3

2 4 3 1 5
1 5 4 2 3
3 5 2 4 1
Hint
In the sample test case, the active copies of these databases are on server 2,1 and 3 in normal state. A = {1,1,1,0,0}
If server 1 or 3 has broken, server 5 will take its work. In case we lost server 2, the second database will use server 4 instead. A = {1,BROKEN,1,1,0}
It‘s clear that in any case this system is load-balanced according to the plan in sample output. 
 

#include <iostream>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <queue>

using namespace std;

int n,m;
int li[111][111];
bool have[111];

struct DUI
{
    int x,s;
    bool operator < (const DUI xx) const
    {
        return s>xx.s;
    }
};

int sum[111];

int main()
{
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        for(int i=1;i<=n;i++)
        {
            sum[i]=m/n+((i<=m%n)?1:0);
        }

        for(int u=1;u<=n;u++)
        {
            priority_queue<DUI> q;
            for(int i=1;i<=n;i++)
            {
                if(i==u) continue;
                q.push((DUI){i,sum[i]});
            }
            for(int i=0;i<sum[u];i++)
            {
                int pos=u+i*n;
                DUI D=q.top(); q.pop();

                li[pos][1]=D.x;

                D.s++;
                q.push(D);
            }
        }



        for(int i=1;i<=m;i++)
        {
            int c=i;
            while(c>n) c-=n;
            li[i][0]=c;
        }

        for(int i=1;i<=m;i++)
        {
            memset(have,false,sizeof(have));
            have[li[i][0]]=true; have[li[i][1]]=true;
            int p=1;
            for(int j=2;j<n;j++)
            {
               while(have[p]==true) p++;
                li[i][j]=p;
                have[p]=true;
            }
        }


        for(int i=1;i<=m;i++)
        {
            for(int j=0;j<n;j++)
            {
                printf("%d%c",li[i][j],(j==n-1)?'\n':' ');
            }
        }
    }
    return 0;
}

HDOJ 4671 Backup Plan 构造优先队列

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原文地址：http://blog.csdn.net/ck_boss/article/details/41393889