naoya_t@topcoder

SRM364 Div1 Easy: Paintball

過去問, 練習 | 23:06 |

300点問題。

• コーディング遅くて嫌になる。162.63点(Passed System Test)
• ソート用の比較関数を作るのとか慣れたい
• split()は過去ログのどこかにある

#define sz(a)  int((a).size())
#define pb  push_back
#define all(c)  (c).begin(),(c).end()
#define tr(c,i)  for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); i++)
#define rep(var,n)  for(int var=0;var<(n);var++)
#define found(s,e)  ((s).find(e)!=(s).end())

bool GreaterTeam(const pair<string,int>& t1, const pair<string,int>& t2){
  if(t1.second > t2.second) return true;
  if(t1.second < t2.second) return false;
  if(t1.first <= t2.first) return true;
  return false;
}

class Paintball {
 public:
  vector<string> getLeaderboard(vector<string> players, vector<string> messages) {
    map<string,int> teams;
    map<string,string> player_team;
    map<string,int> player_point;
    tr(players,it){
      vector<string> s=split(*it);
      player_team[s[0]] = s[1];
      player_point[s[0]] = 0;
      teams[s[1]]=0;
    }
    tr(messages,it){
      vector<string> s=split(*it);
      string p1=s[0], p2=s[2];
      if(p1==p2){
        player_point[p1]--;
      }else{
        string t1=player_team[p1], t2=player_team[p2];
        if(t1==t2){
          player_point[p1]--;
        }else{
          player_point[p1]++;
          player_point[p2]--;
        }
      }
    }
    tr(player_point,it){
      string p=it->first;
      string t=player_team[p];
      teams[t] += player_point[p];
    }
    vector<pair<string,int> > ts(all(teams));
    sort(all(ts),GreaterTeam);
    vector<string> res;
    tr(ts,it){
      stringstream ss;
      ss << it->first << " " << it->second;
      res.pb(ss.str());

      vector<pair<string,int> > ps;
      tr(player_team,jt){
        if(jt->second == it->first){
          ps.pb(make_pair(jt->first,player_point[jt->first]));
        }
      }
      sort(all(ps),GreaterTeam);
      tr(ps,jt){
        stringstream ss2;
        ss2 << "  " << jt->first << " " << jt->second;
        res.pb(ss2.str());
      }
    }
    return res;
  }
};

もう一度書いた。11分。

変数名をうまく付けないと訳がわからなくなる。

今回は比較関数なし。

class Paintball {
 public:
  vector<string> getLeaderboard(vector<string> players, vector<string> messages) {
    map<string,int> ppoint,tpoint;
    map<string,string> team;
    tr(players,it){
      vector<string> s=split(*it);
      string p=s[0], t=s[1];
      team[p]=t;
      ppoint[p]=tpoint[t]=0;
    }
    tr(messages,it){
      vector<string> s=split(*it);
      string p1=s[0], p2=s[2];
      string t1=team[p1], t2=team[p2];
      if(p1==p2){
        ppoint[p1]--;
        tpoint[t1]--;
      }else{
        if(t1==t2){
          ppoint[p1]--;
          tpoint[t1]--;
        }else{
          ppoint[p1]++;
          tpoint[t1]++;
          ppoint[p2]--;
          tpoint[t2]--;
        }
      }
    }
    vector<pair<int,string> > tx;
    tr(tpoint,it) tx.pb(make_pair(-it->second,it->first));
    sort(all(tx));

    vector<string> res;
    tr(tx,it){
      stringstream sst;
      sst << it->second << " " << -(it->first);
      res.pb(sst.str());

      vector<pair<int,string> > px;
      tr(team,jt) if(jt->second==it->second) px.pb(make_pair(-ppoint[jt->first],jt->first));
      sort(all(px));
      tr(px,jt){
        stringstream ssp;
        ssp << "  " << jt->second << " " << -(jt->first);
        res.pb(ssp.str());
      }
    }
    return res;
  }
};