#include "leetcode.h" class MyCalendarThree { public: map count = {{-1, 0}}; int ans = 0; MyCalendarThree() {} int book(int start, int end) { auto s = count.emplace(start, (--count.upper_bound(start))->second); auto e = count.emplace(end, (--count.upper_bound(end))->second); for (auto i = s.first; i != e.first; ++i) ans = max(ans, ++(i->second)); return ans; } }; int main() { int start, end; MyCalendarThree *obj = new MyCalendarThree(); int param_1 = obj->book(start, end); }