What is the time complexity of searching for an element in a std::vector container?

The time complexity of searching for an element in a std::vector container depends on the search method:

• If linear search is used (e.g., std::find), the complexity is O(n), where n is the number of elements in the vector.
• If the vector is sorted and binary search is applied (e.g., std::binary_search or std::lower_bound), the complexity is O(log n).

It is important to remember that std::vector does not provide built-in fast key-based search, so for efficient key-based search, it is better to use other containers, such as std::map or std::unordered_map.