What are some standard algorithms in C++ for competitive programming?

What are some standard algorithms in C++ that I should know for competitive programming?

Some essential C++ standard algorithms include sorting algorithms like std::sort, searching algorithms like std::binary_search, and algorithms for manipulating ranges like std::for_each.

Can you explain how std::sort works?

std::sort sorts a range of elements using the quicksort algorithm by default. It takes two iterators as parameters to define the range and can also take a custom comparator.

What about graph algorithms? Are there any in the standard library?

The C++ standard library doesn't include graph algorithms directly, but you can use data structures like std::vector and std::map to implement them. Libraries like Boost provide additional graph algorithms.

How can I optimize my code using these algorithms?

To optimize your code, focus on choosing the right algorithm for the problem, minimizing time complexity, and using efficient data structures. Profiling your code can also help identify bottlenecks.