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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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Region
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% h% n" L) f1 A& m- Sudoku begins with some of the grid cells already filled with numbers:
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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: % P4 ^7 q. J5 T( B/ f
. K6 D% O5 b! W1 o7 r) U% q! _; F1. Number can appear only once on each row:
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Allowed
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$ H. |! X! P, Y6 ?% aNot allowed 6 N7 T: H/ Q6 V0 D' |
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2. Number can appear only once on each column: ' |7 E8 Q' G$ W2 a
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Allowed Not allowed
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# y. \# \7 C2 H3. Number can appear only once on each region: 7 I% |6 R+ U! s9 d3 }' O
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Allowed Not allowed
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$ b8 y" d; B3 m) 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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