48 lines
1.1 KiB
Lua
48 lines
1.1 KiB
Lua
require "sudoku.utils"
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require "sudoku.check"
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function calValidOptions(b, x, y)
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if b[x][y] ~= 0 then return {} end
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local elm
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local u = {}
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local v = {}
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for i = 1, 9 do
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elm = b[x][i]
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if elm ~= 0 and find(u, elm) == 0 then
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table.insert(u, elm)
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end
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elm = b[i][y]
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if elm ~= 0 and find(u, elm) == 0 then
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table.insert(u, elm)
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end
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end
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-- local xc = ((x - 1) // 3) * 3
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-- local yc = ((y - 1) // 3) * 3
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local xc = math.floor((x - 1) / 3) * 3
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local yc = math.floor((y - 1) / 3) * 3
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for i = 1, 3 do
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for j = 1, 3 do
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elm = b[i+xc][j+yc]
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if elm ~= 0 and find(u, elm) == 0 then
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table.insert(u, elm)
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end
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end
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end
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for i = 1, 9 do
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if find(u, i) == 0 then table.insert(v, i) end
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end
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return v
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end
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function buildSearchSpace(b)
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local s = {}
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for i = 1, 9 do
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s[i] = {}
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for j = 1, 9 do
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s[i][j] = calValidOptions(b, i, j)
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end
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end
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return s
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end
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