puzzle

问题 Im trying to solve a google foobar challenge but I am stuck on how to change this to use recursion. any pointers would be helpful public static int[] answer(int[] l, int t) { // convert the array into a list List<Integer> list = new ArrayList<>(); for (int i : l) { list.add(i); } for (int i = 0; i < list.size(); i++) { Integer n = list.get(i); if (i >= 1) { Integer nMinus1 = list.get(i - 1); Integer nMinus2; Integer nMinus3; Integer nMinus4; Integer nMinus5; Integer nMinus6; if (n + nMinus1 =

问题 I just saw this here #include <stdio.h> int main(int argc, char *argv[printf("Hello, world!\n")]) {} What this does is print "Hello World!" But what's actually going on here? The best I can guess is that it gets compiled and thrown at the top of the execution stack, but the syntax doesn't even look legal to me ... 回答1: The code makes use of C99's variable-length array feature, which lets you declare arrays whose size is known only at run-time. printf returns an integer equal to the number of

问题 I just saw this here #include <stdio.h> int main(int argc, char *argv[printf("Hello, world!\n")]) {} What this does is print "Hello World!" But what's actually going on here? The best I can guess is that it gets compiled and thrown at the top of the execution stack, but the syntax doesn't even look legal to me ... 回答1: The code makes use of C99's variable-length array feature, which lets you declare arrays whose size is known only at run-time. printf returns an integer equal to the number of

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Without running this code, identify which Foo method will be called: class A { public void Foo( int n ) { Console.WriteLine( "A::Foo"

问题 I am trying to find a solution of the puzzle game 'Flood It'. The main idea is to turn a whole N*M game board of k different colors into a single color. I have to start from the top left corner of the board and turn the same colored block into one of the colors of neighboring nodes and thus moving ahead and flooding the whole board into a single color at last. For example: Initial Board: 1 1 1 2 2 3 1 1 2 3 4 5 1 1 1 1 3 4 1 4 3 2 1 5 2 3 4 5 1 2 Final Board: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I've been searching everywhere and I dont know what to do to make the cursor able to click on a tile and delete it so other tiles above it can fall down. For that matter, anybody know how to load random tiles on

问题 I want to create a sliding puzzle with different formats like: 3x3, 3x4, 4x3 and 4x4. When you run my code you can see on the right side a selection box where you can choose the 4 formats. I can move each puzzlepiece to blank space but the problem is that it shouldn't be possible to shift pieces diagonal aswell as only pieces which directly border on the blank space not from further away. Anyone knows how to fix that? Here is an good example how the puzzle should work: http://www.yash.info

问题 #include <stdio.h> int main(void){ unsigned a[3][4] = { {2,23,6,7}, {8,5,1,4}, {12,15,3,9} }; printf("%u",*((int*)(((char*)a)+4))); return 0; } The output in my machine is the value at a[0][1] i.e 23 .Could somebody explain how is this working ? Edit: Rolling Back to old yucky code,exactly what was presented to me :P 回答1: So you have your array in memory as so: 2, 23, 6, 7, 8... What this does is cast the array to a char* , which lets you access individual bytes, and it points here: 2, 23, 6,

问题 Question I would like to be able to use a single regex (if possible) to require that a string fits [A-Za-z0-9_] but doesn't allow: Strings containing just numbers or/and symbols. Strings starting or ending with symbols Multiple symbols next to eachother Valid test_0123 t0e1s2t3 0123_test te0_s1t23 t_t Invalid t__t ____ 01230123 _0123 _test _test123 test_ test123_ Reasons for the Rules The purpose of this is to filter usernames for a website I'm working on. I've arrived at the rules for

问题 I came across a fun math problem yesterday and have it solved, but with the code I wrote, I had to do a keyboard interrupt or it would run forever, lol. So I changed it to have an end condition, but now it only prints 1 solution and stops. The problem goes like this: "You have the numbers 123456789, in that order. Between each number, you must insert either nothing, a plus sign, or a multiplication sign, so that the resulting expression equals 2002. Write a program that prints all solutions.