Programmer Group

I. Introduction In c + +, the common way to generate random numbers is to call the srand() and rand() functions. It is worth noting that the random number "generated" in all programs is actually a pseudo-random number, which is essentially a set of unordered numerical sequences stored in the computer. Therefore, when initializing the ...

Problem surface Word Solitaire is a game similar to the idiom Solitaire we often play. Now we know a group of words, and given an initial letter, we need to give the longest "dragon" that starts with this letter (each word appears twice in the "dragon" at most). When two words are connected, their overlapping parts are comb ...

meaning of the title   Sol It's like the first time I've been exposed to ternary pressure First of all, it's not necessarily the best to eat gems after each fight, because there are imitation monsters, maybe you can hit GG after you finish eating gems with him.. So there are three states that we need to maintain 0: no fight 1: I beat ...

Analysis of lambda expression Big premise: capture the timing of variables in the list. There is a difference between the capture list and the parameter list. The variables in the capture list are determined at the time of capture, not at the time of lambda call. The parameter list is determined at the time of call. So when I capture an int i ...

meaning of the title Title Link Give a tree, delete some edges, so that the distance between any point in any connected block is less than $k$ sol The greedy thought in the examination room is right: consider a subtree. If the distance between the deepest two nodes in the subtree is added $> k $, the deepest point will be deleted. When u ...

Detailed explanation of bind function of standard library bind function: receive a function name as a parameter to generate a new function. auto newCallable = bind(callbale, arg_list); Arg list may contain parameters such as 1, 2, etc., which are parameters of the new function newCallable. In this blog Introduction to lambda expression In, ...

Global warming You have a picture of a sea area with NxN pixels, "." for ocean, "#" for land, as shown below: ....##....##......##....####....###.... An island is made of land connected in all four directions.For example, there are two islands in the picture above. Because global warming is causing sea level rise, scientists ...

Standard library map set insertion 1, Insert operation The map is as follows: map<string, size_t> cnt; Insert method: Insert operation type Function description cnt.insert({"abc", 12}); Use braces directly cnt.insert(make_pari("abc", 22)); Return a pair with the make u pair function cnt.insert(pair<string, size_t>("abc", 22 ...

Project requirements Project 10 uses port1,port2,port3,port4,prot5, and set  port1, set  port2, set  port3, set  port4, set  port5 to manage five ports. The code is bloated and repetitive, which is not easy to maintain. Solution:Use an array of structs. Project realization Modification: //Five port variables are defined //struct port por ...

Standard library map set delete Delete operation The map is as follows: map<int, size_t> cnt{{2,22}, {3,33}, {1,11}, {4,44}; Delete method: Delete operation type Function description cnt.erase(3); Delete the element with key 3 and return the number of deleted elements cnt.erase(p); P is the iterator, delete the element pointed by P ...