everyone can see their own ranking, and it is updated in real time. If the number of users is small, you can use the ordered collection of redis. If the number of users is large, this solution will not work. ...
KMP finds the position of pattern string P in the main string S. calculates the next [j] = k function of the pattern string P. meaning: is provided with main string S, mode string P, and the first j characters of main string S and mode string P hav...
suppose there are 100 questions on a test paper, each with a score of 1 out of 100. Each question has four options (all single-choice questions). now many people have done this paper, and we have all the answer information and scores. Note: we do not k...
for example, given a number 210 (11010010 in binary), where bits 2, 5, 7, and 8 are 1 (starting from the rightmost), then the result is [2 mine5, 7, 8]. are there any efficient solutions? ...
for example, the integer 430 (110101110 in binary), I want to find out where the fourth 1 of this number starts on the right, which in this case is 5 (the ordinal starts at 0). are there any efficient algorithms? The implementation of any language is ...
for example, there are two arrays, one number for each group, and a new array according to size,. if size is 2, then the result is [1pje 1], [1p3], [1p4], [2pr 1], [2pr 3], [2pr 4], [3pr 1], [4pr 1], [2pr 1], [3jue 2], [4jue 2]]; if size is 3, the resu...
if you have a question, find the answer ...
encountered a multiple choice question and did not find a solution. Please take a look at it I think the second one is chosen, but the answer is wrong ...
now a lot of artificial intelligence is some API calls underlying data structures should we use traditional data structures, such as linked lists, binary trees, etc. ...
topic description how to loop the output in positive order and then in reverse order, for example: 123321123321 sources of topics and their own ideas the idea is to give an array to 3 and reverse it . related codes arr=[3,2,1] for(i=0;i<1...
for example, there is such an array of objects let data = [ { title: , tagName: h1 }, { title: , tagName: h1 }, { title: , tagName: h2 }, { title: , tagName: h3 }, { title: , t...
var sava = [] var obj = {arr:[{arr[{arr[],id:4}],id:2},{arr[],id:3}],id:1} there is an arr array and an id,arr array in the object obj, and there is a child arr array and an id, in it. I want to put each id no matter how many levels (actually up to thr...
to make an educational Mini Game , there is a 5 6 matrix, as shown in the following figure 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 want to randomly select a point from the matrix, take this point...
1010 derivation of unary polynomial Design function to find the derivative of unary polynomial. (note: the first derivative of x ^ n (n is an integer) is nx ^ n (n-1).) input format: enter polynomial non-zero coefficients and exponents in an exponent...
problem description for example, a total of 100IP needs to be allocated, and the proportion of traffic for each hour has been set. Divide the IP into a time period (one-dimensional array, one for each segment, and 0 if it is not assigned to the IP). A...
https: leetcode.com problems. my idea is to violently match the first letter, and then match the remaining letters up and down like a gluttonous snake, while using a vector k plus a Hash to convert the coordinates to a unique ID, to record the pa...
php algorithm-- catching water droplets A novice PHP programmer, who has been on the job for half a year and is still hovering in endless additions, deletions, modifications and data optimization, has recently been brought into the algorithm pit by th...
multiple rectangles of different sizes are randomly distributed in a large rectangle, and these rectangles cannot overlap. (before the Ke sub-rectangle is finished, there is not enough space left for the large rectangle to put down a small rectangle, bu...
declare 40 < A < 60,20 < B < 80 and A + B = = 100 how to randomly generate An and B? first modification: statement 40 < A < 60,20 < B < 80,30 < C < 70 and A + B + C = = 150 how to randomly generate A, B and C? Finally, this is used for roll CoC ru...
1012 for example, one step at a time, a total of 10 steps, this is one of the ways. for example, take two steps at a time for a total of five steps, which is another way to go. but it s too troublesome to do this one by one. We can just think about...
want to use vue to achieve the function, the list is to request the data for loop to render, click the button in the list item to change whether the neighboring sibling elements are displayed, and how to achieve this function, ask the god to help come up...
not long after learning java, I encountered a relatively basic problem. I don t know the cause. I hope I can get an answer! Thank you. System.out.println ((StuArr [I] .SName = = "Zhang San ")); System.out.println) ((findName== "Zhang San ")); the...
createdTime: {type: Date, required: true, default: Date.now}, +30 endTime: {type: Date, required: true, default: Date.now + } how to implement Date.now + for half an hour ...
recently, a problem has been found in the project of rendering all ends of the server with nuxt.js. For example, there are multiple concurrent requests on a page, and as long as there is a problem with one request, the whole page will not work. When rend...
url: I requested in the browser http: localhost:8080 A servlet and < welcome-file-list > are configured in web.xml, respectively, with the following code <welcome-file-list> <welcome-file>index.html< welcome-file> ...