initialize a vector with another vector c++ complexity

To initialize a vector with another vector in C++, you can use the assignment operator or the constructor. The complexity of this operation depends on the size of the vectors being initialized. If the vectors are of size n, then the complexity of initializing one vector with another using the assignment operator is O(n), as it involves copying each element from one vector to another. Similarly, using the constructor to initialize a vector with another vector also has a complexity of O(n), as it involves copying each element from the source vector to the new vector.