Programmer Think

prefacehello, everyone, I'm bigsai brother. I haven't seen you for a long time. I miss you very much 🤩!Today, I'll share a TOPK problem, but I don't consider a particularly large distributed solution here. It's an ordinary algorithm problem.First, find out what is the topK problem?The topK problem is to find out the number of the first k in th ...

Introduction: This article is translated from Altinity's series of technical articles on ClickHouse. ClickHouse, an open source analysis engine for online analytical processing (OLAP), is widely used by companies at home and abroad because of its excellent query performance, PB level data scale and simple architecture. This series of technical ...

1, Foreword This chapter mainly explains: Basic knowledge and implementation of eight sorting Note: the eight sorts here refer to direct insertion, hill, selection, stacking, bubbling, fast sorting, merging and counting Eight sorting summary charts: 2, Sorting concept and Application 1. Concept Sort: The so-called sorting ...

Title Description TOM the cat and JERRY the mouse have been competing again recently, but they are adults after all. They don't like to play the game of chasing each other. Now they like to play statistics. Recently, TOM old cat found something called "reverse order pair" in human class. This thing is defined as follows: for a given ...

55. Minimum stack force buckle (LeetCode) 👉155. Minimum stack force buckle (LeetCode) Topic Description: design push, pop, top and getMin functions, and find the minimum value when the time complexity is O(1) Wrong idea: given a variable to record the minimum value, this idea is wrong, and we should consider the problem more comprehensi ...

The maximum rectangular area of rainwater and histogram are two problems that echo each other. There are many similarities in principle, but there are differences in details. Connected to rainwater (monotonous stack) Brute force method (double pointer): Note that after finding the highest column on the left and right sides, it is also ne ...

Title Description: Title Link stamp Problem solving ideas: The advanced problem of the problem requires the time complexity of O(nlogn) and the space complexity of O(1). The sorting algorithm with time complexity of O(nlogn) includes merge sort, heap sort and quick sort (the worst time complexity of quick sort is O(n^2), and the sorting al ...

Author: Zhai Tianbao Steven Copyright notice: the copyright belongs to the author. For commercial reprint, please contact the author for authorization. For non-commercial reprint, please indicate the source Title Description: Enter a complex linked list (each node has a node value and two pointers, one pointing to the next node and the other ...

2021CCPC northeast four provinces competition A. Matrix General meaning You need to use [ 1 , n 2 ] [1, n^2] All numbers ...

1, Basic concepts Sequential table is a sequential storage structure of linear table, which uses storage units with continuous addresses to store data elements. Symbolic representation of sequence table: Suppose there are n (n ∈ N) data elements of the same type, and the ith element (1 ≤ i ≤ N) is expressed as ai, then the sequenc ...