sudoku y wing

Problem Description: Given the 9x9 matrix, see whether it is a valid Sudoku, not all are filled with numbers, can be.Algorithm analysis: This problem is judged, not difficult, effective Sudoku three sufficient conditions, rows, columns, 3*3 sub-matrix, all to meet the number can not be repeated.1 Public BooleanIsvalidsudoku (Char[] board)2 {3 if(board = =NULL|| Board.length! = 9 | | Board[0].le

The rule of Sudoku is this: In a 9x9 box, you need to fill in the number 1-9 into a space, and make each row and column of the square contain 1-9 of these nine numbers. Also ensure that the space in the thick line divided into 9 3x3 squares also contains 1-9 of these nine numbers. For example, if you have such a problem, you can take a closer look at each line, each column, and each 3x3 square contains 1-9 of these nine numbers.Examples:Answer:The inp

; for(intx=0;x9; x + +) for(inty=0;y9; y++) { Charch=s[k++]; inta,b,c,d; if(ch=='.') { for(intI=1; i9; i++) {a=x*9+y+1; b=x*9+i+Bayi; C=y*9+i+Bayi+Bayi; intS= (x/3)*3+y/3; D=s*9+i+Bayi+Bayi+Bayi; ++R; Dlx. Link (R,a,x,y,i); Dlx. Link (R,b,x,y,i); Dlx. Link (R,c,x,y,i); Dlx. Link (R,d,x,y,i); } } Else { inti=ch-'0'; A=x*9

A good question is also very useful and has made several mistakes. 1. Thinking has an error in enumeration assignment: when the current assignment cannot be completed, it should be to continue the next loop, rather than return false to terminate the enumeration. 2. The generic programing is wrong. Originally, the memset wanted to be written as the generic programing. Then, there will always be only the first group of results No, tears ,,, #include Poj2676

Sudokuproblem ' s Link: http://poj.org/problem?id=2676 Mean:SlightlyAnalyse:Log all empty locations, determine whether the current empty position can fill a number, and then direct DFS, notice from the forward search, the time is much faster than the positive searching. 16ms Water OverTime Complexity:o (n)Source Code://Memory Time//1347K 0MS//by:crazyacking//2015-04-10-14.30#include #include#include#include#include#include#includestring>#include#include#include#include#include#defi

Sudoku Time limit:2000 ms Memory limit:65536 K Total submissions:13665 Accepted:6767 Special Judge DescriptionSudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown on the figure. in some of the cells are written decimal digits from 1 to 9. the other cells are empty. the goal is to fill the empty cells with decimal digits from 1 to 9, one digit pe

Question: Give a square number array with a side length of N * n, and then ask whether there is a heavy number of values in each row, column, and array. Let's take a look at the two examples. Question: What do you want me to do ?...... If not, how much water should you have. Directly code one byte and one byte. Code: #include [Poj3435] Sudoku checker. Note: This is not a Sudoku !!!!

1. Let's see if the phone has been upgraded to the FlyMe OS 3.6.1A (experience version) if you don't find the upgrade method, only upgrade to the FlyMe OS 3.6.1A (experience version) before you can use the nine input method. 2. If determined to be FlyMe OS 3.6.1A (Experience edition), you can set up nine Sudoku Input method. 3. Now we click on "Language and Time"-"system keyboard" as shown in the following figure. 4. In the system keyboard we

the computer simulated manual solution process to the clipboard (CTRL + U key) and use the manual reasoning method: unique number, implicit unique number, number pair, and implicit number pair, unique rectangle method, three-Chain number, implicit three-Chain number, four-Chain number, implicit four-Chain number, area cut-down method, rectangle method (X-WING, swordfish, jellyfish ), association deletion method (forcing chain), etc. Vii) voice prompt

Sudoku games require the number of 1~9 to be filled in a 9x9 grid, so that there are no duplicate numbers in each row, column, or nine 3x3 sub-regions.With a little thought, I wrote the first solution. This approach can be referred to as backtracking in the context of Wikipedia 1. The idea is simple, and sequentially scans each space to fill in numbers:1. Fill in the first space with "1" to check if the number is valid (the row, column, and the 3x3 su

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