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拓扑排序:

两个队列,一个放不需要重启入度为0的,一个放需要重启入度为0的....从不需要重启的队列开始,每弹出一个数就更新下入度,遇到入读为0的就加入到相应队列里,当队列空时,记录重启次数+1,交换队列..一直到两个队列都为空

Smart Software Installer

2

glibc:
gcc*: glibc

uefi*:
gcc*:
raid_util*: uefi
gpu_driver*: uefi
opencl_sdk: gpu_drivergcc

Case 1: 1
Case 2: 2 

#include <iostream>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <string>
#include <sstream>
#include <map>
#include <queue>

using namespace std;

const int maxn=2000;

map<string,int> mSI;
int nm;
bool restart[maxn];
int degree[maxn];

int hash(string name)
{
    int ret=mSI[name];
    if(ret==0)
    {
        mSI[name]=nm++;
        ret=nm-1;
    }
    return ret;
}

struct Edge
{
    int to,next;
}edge[maxn*maxn];

int Adj[maxn],Size;

void init()
{
    memset(Adj,-1,sizeof(Adj)); Size=0;
}

void add_edge(int u,int v)
{
    edge[Size].to=v; edge[Size].next=Adj[u]; Adj[u]=Size++;
}

int TUOPU()
{
    queue<int> q[2];
    int a=0,b=1;
    int n=nm-1;
    for(int i=1;i<=n;i++)
    {
        if(degree[i]==0)
        {
            if(restart[i]==true) q[b].push(i);
            else q[a].push(i);
        }
    }
    int time=0;
    while(!q[a].empty()||!q[b].empty())
    {
        while(!q[a].empty())
        {
            int u=q[a].front(); q[a].pop();
            for(int i=Adj[u];~i;i=edge[i].next)
            {
                int v=edge[i].to;
                degree[v]--;
                if(degree[v]==0)
                {
                    if(restart[v]==true) q[b].push(v);
                    else q[a].push(v);
                }
            }
        }
        if(q[b].empty()==true) continue;
        time++;swap(a,b);
    }
    return time;
}

int main()
{
    int T_T,cas=1;
    scanf("%d",&T_T);
    getchar(); getchar();
    while(T_T--)
    {
        init();
        mSI.clear(); nm=1;
        memset(restart,false,sizeof(restart));
        memset(degree,0,sizeof(degree));

        string line,name;
        while(getline(cin,line))
        {
            if(line[0]==0) break;
            istringstream sin(line);
            sin>>name;
            bool flag=false;
            int sz=name.size();
            if(name[sz-2]=='*')
            {
                flag=true;
                name[sz-2]=0;
                name.resize(sz-2);
            }
            else
            {
                name[sz-1]=0;
                name.resize(sz-1);
            }

            int to=hash(name);
            restart[to]=flag;
            while(sin>>name)
            {
                int from=hash(name);
                add_edge(from,to);
                degree[to]++;
            }
        }
        printf("Case %d: %d\n",cas++,TUOPU());
    }
    return 0;
}

HDOJ 5098 Smart Software Installer 拓扑排序

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原文地址：http://blog.csdn.net/ck_boss/article/details/40780999