by checking with check50. I got following error
:( 3x3 board, move blank up (tile 3), then try tile 2 \ expected "0" character 5 of line 10, not "2":) 3x3.txt wins the 3x3 board
Link:
https://sandbox.cs50.net/checks/cc00590ead9e428ea8d19110beadd25d
Can anybody tell what is wrong?