In this post, we will see how to resolve Improve performance of Array ordering by IDs Question: I have a function: As you can see, it calls getModelsFromCache which roughly looks like this: As you can see, getModelsFromCache returns and ...

In this post, we will see how to resolve Time Complexity of a Recursive Function with a Reducing Parameter Question: This is the function. What’s the big O notation and how can I calculate it? I’m new to this. Is ...

In this post, we will see how to resolve How does a two level sorting algorithm work? Question: I had a problem where I wanted to sort a list of tuples, first by the first element and then by the ...

In this post, we will see how to resolve What will be the time complexity of this code fragment? Question: Given this question where increment over the iterator i happens by incrementing its value by its own log value. What ...

Question: So I have a graph (std::map) that stores strings as the keys and the values are sets of strings (adjacency lists for each node in a graph): std::map<std::string, std::set<std::string>> graph My insertion code is simply: graph[from].insert(to) where from and ...

Question: What is meant by “Constant Amortized Time” when talking about time complexity of an algorithm? Best Answer: Amortised time explained in simple terms: If you do an operation say a million times, you don’t really care about the worst-case ...

Question: Can someone help explain how can building a heap be O(n) complexity? Inserting an item into a heap is O(log n), and the insert is repeated n/2 times (the remainder are leaves, and can’t violate the heap property). So, ...

Question: Most people with a degree in CS will certainly know what Big O stands for. It helps us to measure how well an algorithm scales. But I’m curious, how do you calculate or approximate the complexity of your algorithms? ...

Question: I have gone through Google and Stack Overflow search, but nowhere I was able to find a clear and straightforward explanation for how to calculate time complexity. What do I know already? Say for code as simple as the ...

Question: What are the differences between NP, NP-Complete and NP-Hard? I am aware of many resources all over the web. I’d like to read your explanations, and the reason is they might be different from what’s out there, or there ...