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];}};