1150 Travelling Salesman Problem (25 分)

水~。

const int N=210;
int g[N][N];
int n,m,q;

int main()
{
    cin>>n>>m;

    memset(g,0x3f,sizeof g);
    while(m--)
    {
        int a,b,c;
        cin>>a>>b>>c;
        g[a][b]=g[b][a]=c;
    }

    cin>>q;
    int kase=1;
    int minidx=0,mindist=INF;
    while(q--)
    {
        int k;
        cin>>k;
        vector<int> v(k);
        set<int> node;
        for(int i=0;i<k;i++)
        {
            cin>>v[i];
            node.insert(v[i]);
        }

        bool ok=true;
        int res=0;
        for(int i=0;i<k-1;i++)
        {
            int a=v[i],b=v[i+1];
            if(g[a][b] == INF)
            {
                ok=false;
                break;
            }
            res+=g[a][b];
        }

        string desc;
        if(!ok) desc="Not a TS cycle";
        else if(v[0] != v[k-1] || node.size() < n) desc="Not a TS cycle";
        else if(k != n+1) desc="TS cycle";
        else desc="TS simple cycle";

        if(!ok)
            printf("Path %d: NA (%s)
",kase++,desc.c_str());
        else
        {
            if(desc != "Not a TS cycle" && res < mindist)
            {
                mindist=res;
                minidx=kase;
            }
            printf("Path %d: %d (%s)
",kase++,res,desc.c_str());
        }
    }

    printf("Shortest Dist(%d) = %d
",minidx,mindist);

    //system("pause");
    return 0;
}