有人可以帮我理解这个解决方案:
Initialize 2D array with 81 empty grids (nx = 9, ny = 9)
Fill in some empty grid with the known values
Make an original copy of the array
Start from top left grid (nx = 0, ny = 0), check if grid is empty
if (grid is empty) {
assign the empty grid with values (i)
if (no numbers exists in same rows & same columns same as (i) & 3x3 zone (i) is currently in) …