naoya_t@topcoder

SRM356 Div1 Easy: AverageProblem

過去問, 練習 | 01:23 |

• 丸め誤差に泣く問題。再投稿×2

class AverageProblem {
 public:
  int numberOfParticipants(vector<string> marks) {
    set<int> s;
    tr(marks,it){
      vector<string> m_ = split(*it);
      tr(m_,jt) s.insert((int)(1000 * atof(jt->c_str()) + 0.5));
    }

    for(int ps=1;;ps++){
      set<int> s_;
      double u = 1000.0 / ps;
      for(int i=0;i<=ps*10;i++)
        s_.insert((int)(u*i+0.0000001));
      tr(s,it) if (!found(s_,*it)) goto next;
      return ps;
   next:;
    }
  }
};