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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": ' E) i& Y+ z$ y( n! a
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0 q3 D1 [3 g' HRegion - w5 k8 m/ g6 \ h7 d
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- Sudoku begins with some of the grid cells already filled with numbers: % A6 U# r# J) A$ ~
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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: 7 ]$ T2 \& w' V
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1. Number can appear only once on each row: 0 ^, t% D3 y2 ~% A5 M
' o# C/ v/ b% ]3 R" Y; p
Allowed " w+ r4 L3 O' x, ^. X
2 w. w2 N5 h# i m+ \6 r8 i
Not allowed / M2 l- r3 f- f" u, P/ S) a
& ^6 B6 l5 F |) O
2. Number can appear only once on each column: 5 R3 S3 b S6 I# q4 ?
s& [2 p+ [- y- @% B- @
Allowed Not allowed
9 J( p1 P4 R/ u
6 L; ^0 p2 @4 j
5 h2 Q* s: b1 R8 W, G! b8 I+ s3. Number can appear only once on each region: : F& q) H8 B. g5 ~, P N
; L+ s! v# O& iAllowed Not allowed
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/ [! W* w3 ^6 r- 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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