Recently I am working on a QT project, which requires identifying keyboard input keys to generate shortcut keys. There is a class QKeySequenceEdit in QT. Using this, you can directly obtain keyboard input. However, if you want to filter out the keys you do not want to recognize, you must rewrite it. ThekeyPressEvent(QKeyEvent *e) function. […]
Tag: combinations
Switches and routers realize the division of different network segments, communication between different vlans, and specify combinations of vlans for network communication.
Switches and routers implement the division of different network segments, communication between different vlans, and designated combinations of vlans for network communication. I recommend a very easy-to-use free online tool for drawing: https://www.processon.com/i/5f58a647e658155997003a46 1. Examples of network requirements 1. Assume that there are three PCs A, B, and C, which need to be on different […]
[C++ code] Backtracking, subsets, combinations, full arrangements, deduplication – Code Random Notes
Title: Split palindrome string Given a string s, please split s into some substrings so that each substring is a palindrome string. Returns all possible splitting options for s. Palindrome string is a string that reads the same when read forward or backward. In the for (int i = startIndex; i < s.size(); i + […]
Number of Rigorous SubsequencesNumber of combinations
Description We claim a sequence Z is rigorous if it consists of one or more ‘2’,and then one or more ‘1’, and then one or more ‘0’. For example,[2,2 ,2,1,0,0] and [2,1,0] are both rigorous, while [1,2], [1,2,0], and [1,1,0] are not. In this question, given a integer sequence X including only 0,1,2, you are […]
Implement the action recognition driver on the OS that supports single-click, double-click, long press, and super long press combinations of multiple keys.
I just want to implement a key parsing function on the freertos platform. I would like to share my ideas with you. Considering that it may be transplanted to other platforms in the future, I have separated the driver platform. General idea Considering that the product has low power consumption requirements, it is not suitable […]
Number of combinations: fast power + Lucas theorem + Fermat’s little theorem
Title Please note that the range of numbers in this question is extremely large! This question requires the use of Lucas theorem Lucas theorem O(plogNlogp) C a b m o d p = C a m o d p b m o d p ? C a / p b / p m o d […]
R language uses Cartesian product and ggvenn() function to draw the Venn distribution diagram of N*N*N*N color combinations
library(ggvenn) set.seed(20190708) genes <- paste(“gene”,1:1000,sep=””) x <- list( A = sample(genes,300), B = sample(genes,525), C = sample(genes,440), D = sample(genes,350) ) ggvenn( x, fill_color = c(“aliceblue”, “slateblue”, “springgreen”, “thistle”), stroke_size = 0.5, set_name_size = 4 ) According to the Cartesian product principle, the color of each partition of the Venn diagram should be different, which […]
Educational Codeforces Round 148 (Rated for Div. 2) E. Combinatorics Problem (recursion/number of combinations)
Original question link: E. Combinatorics Problem The main idea of the title: Given a length of n n array of n a a a (obtained according to the formula of the original question) and a positive integer k k k, you need to calculate a length of n n new array of n b b […]
7-1 Number of combinations III (expanding the data range) Java
7-1 Number of combinations III (extended data range) score 50 Author Ma Jun Unit Lanzhou University Implementation code: import java.util.Scanner; public class Main { // constant for modulo private static final int MOD = 1000000007; // Solve the number of combinations C(n, m) private static long combination(int n, int m) { long[][] dp = new […]
R language draws the famous house X network connectivity graph with complete color combinations
library(igraph) library(RColorBrewer) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Set3″)) V(g3)$name <- letters[1:5] plot(g3) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Set2″)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Set1″)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Pastel1″)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Pastel2″)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Paired”)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Dark2″)) g3 <- make_graph(“HouseX”)%>%set_vertex_attr(“color”, value = brewer.pal(5,”Accent”)) g3 […]