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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":
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7 y) \( f2 ]& aRegion : M! b; Z8 E9 d0 l. K5 o
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0 r4 E2 g. ~/ |7 z* w R- Sudoku begins with some of the grid cells already filled with numbers: 0 q+ Z$ F3 X- b
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1 h4 k- r9 P7 p$ E. E' C! a) v- 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: ' W; ^2 Y- g2 s5 U2 ~; f
3 v( C* p- S9 h/ o$ \( D1. Number can appear only once on each row:
% \0 |7 |# v( E) @5 V7 R' u: t9 v6 j) s% u0 J5 z! }
Allowed
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% F7 o4 ] ?8 f+ t0 }4 {/ _Not allowed , ?2 P2 W! m( M- w! N/ O. k$ O
; t& z4 J8 M1 @/ H, i S3 Y2. Number can appear only once on each column:
3 W& m. @ a3 O3 `# @8 x3 Z2 f$ e: D8 P* k* A2 V. g1 N: f7 h
Allowed Not allowed 7 z# N9 q! Z! c$ B7 p
& L8 M! J, [4 }6 q, }1 u. r
* I' ~1 b% }4 H( `5 r3. Number can appear only once on each region:
5 F5 n8 D) N$ v* y* ~; s5 H2 v7 k9 c) B
Allowed Not allowed
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- 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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