Mis on unordered_set konteineri elemendi otsimise ajakulud?

In an unordered_set container, searching for an element has an average time complexity of O(1), which is constant time. This is achieved through the use of a hash table.

However, in the worst case, when there are many collisions, the complexity can degrade to O(n), where n is the number of elements in the container. But in practice, such cases are rare if the hash function is correctly implemented and the table size is sufficient.