力扣911.在线选举

力扣911.在线选举

• 类似1818. 将每个时刻的候选人存储 在时间段上做二分

  class TopVotedCandidate {
      vector<int> time,person;
  public:
      TopVotedCandidate(vector<int>& persons, vector<int>& times) {
              int n = persons.size();
              unordered_map<int,int> cnt;
              int ms = 0,mi = 0;
              time = times;
  
              for(int i=0;i<n;i++)
              {
                  if(++cnt[persons[i]] >= ms)
                  {
                      ms = cnt[persons[i]];
                      mi = persons[i];
                  }
                  person.push_back(mi);
              }
      }
      
      int q(int t) {
          int idx = ranges::upper_bound(time,t) - time.begin() - 1;
          return person[idx];
      }
  };