I think the input variable
board is not a
list of lists of 1 length string as describe in the python code snippet, in fact, according my AC-ed code, the
board is a
list of strings with the same length, which is the same with what people may intuitively think.
It is a typo error; "board, a list of lists of equal length strings" is the right statement
Looks like your connection to LeetCode Discuss was lost, please wait while we try to reconnect.