1153 Decode Registration Card of PAT (25 分)

sb题，不想过多描述==。

struct Node
{
    string id;
    int score;
    bool operator<(const Node &W) const
    {
        if(score != W.score) return score > W.score;
        return id < W.id;
    }
};
unordered_map<char,vector<Node>> mp1;
unordered_map<string,PII> mp2;
unordered_map<string,vector<Node>> mp3;
int n,m;

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

    for(int i=0;i<n;i++)
    {
        string id;
        int score;
        cin>>id>>score;
        mp1[id[0]].pb({id,score});
        mp2[id.substr(1,3)].fi++,mp2[id.substr(1,3)].se+=score;
        mp3[id.substr(4,6)].pb({id,score});
    }

    int kase=1;
    while(m--)
    {
        int t;
        cin>>t;
        if(t == 1)
        {
            char c;
            cin>>c;
            printf("Case %d: %d %c
",kase++,t,c);
            vector<Node> res;
            for(int i=0;i<mp1[c].size();i++)
            {
                Node j=mp1[c][i];
                res.pb(j);
            }

            sort(res.begin(),res.end());
            if(res.size() == 0) puts("NA");
            else
            {
                for(int i=0;i<res.size();i++)
                {
                    Node j=res[i];
                    printf("%s %d
",j.id.c_str(),j.score);
                }
            }
        }
        else if(t == 2)
        {
            string site;
            cin>>site;
            printf("Case %d: %d %s
",kase++,t,site.c_str());
            if(mp2[site].fi == 0) puts("NA");
            else
                printf("%d %d",mp2[site].fi,mp2[site].se);
        }
        else
        {
            string date;
            cin>>date;
            printf("Case %d: %d %s
",kase++,t,date.c_str());
            unordered_map<string,int> res;
            for(int i=0;i<mp3[date].size();i++)
            {
                Node j=mp3[date][i];
                res[j.id.substr(1,3)]++;
            }

            vector<Node> ans;
            for(auto t:res)
                ans.pb({t.fi,t.se});

            sort(ans.begin(),ans.end());
            if(ans.size() == 0) puts("NA");
            else
            {
                for(int i=0;i<ans.size();i++)
                {
                    Node j=ans[i];
                    printf("%s %d
",j.id.c_str(),j.score);
                }
            }

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