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群组: 数学建模 群组: 数学趣味、游戏、IQ等 群组: 趣味数学 群组: 加油数模,加油美国赛。 群组: 南京邮电大学数模协会 |
Sudoku is played over a 9x9 grid, divided to 3x3 sub grids called "regions": f# D# B( p6 S1 X0 L) J: f
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& m. m$ Y. v1 B+ }) C
Region
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! [( p4 w" E9 H- H
- Sudoku begins with some of the grid cells already filled with numbers: 6 U3 v& d5 T% } f
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- The object of Sudoku is to fill the other empty cells with numbers between 1 and 9 (1 number only in each cell) according the following guidelines: 6 L' w# h5 M5 w% G5 n0 C5 `: z
+ ^/ X( ?. F2 U& A/ o x8 C& M1 y6 |1. Number can appear only once on each row: * b! [4 O! F# O% N+ c6 a
8 V# C; x( T8 M2 AAllowed
8 L! U2 U- k' U1 \
: M2 F7 o2 R Q" UNot allowed ) w' U2 v4 S7 [4 p1 N, f
k: W' l6 l. _( v% K2. Number can appear only once on each column:
$ x9 ~# H8 N+ D8 `, X# [
5 F% T* o( Q' |" \9 iAllowed Not allowed 1 d/ h0 g: M% x
/ f$ @ }& Z F2 d. H
) a2 A' K( _3 \; H) K T3. Number can appear only once on each region: & @3 K) \6 |) {9 \- X
+ ~+ ^; F% \4 w9 M( X+ b
Allowed Not allowed
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9 j+ H. n0 r$ m9 m- A summary of these guidelines would be, that a number should appear only once on each row, column and a region. |
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