Bug Report for time-based-key-value-store

[alambin]

Bug Report for https://neetcode.io/problems/time-based-key-value-store

Wrong complexity estimation for solution "2. Binary Search" in C++. If we use std::map, complexity of set() method is a sum of:

1. O(1) for search in std::unordered_map
2. O(Log M) for insertion to std::map
   Description of solution says "O(1) for set()"