valid_suduku.go 源码
package main
//有效的数独
func isValidSudoku(board [][]byte) bool {
var hor, ver, grid [9][9]bool
for i := 0; i < 9; i++ {
for j := 0; j < 9; j++ {
if board[i][j] != '.' {
k := board[i][j] - '1'
if hor[i][k] || ver[j][k] || grid[i/3*3+j/3][k] {
return false
}
hor[i][k], ver[j][k], grid[i/3*3+j/3][k] = true, true, true
}
}
}
return true
}