I think this question's description is not clear enough.
What if the number of rows is 4? How will the second column be like?
I agree with you. I spend some time to figure this out.
if the input numRows = 4, I think the expected result will looks like
P I N
A L S I G
Y A H R
The output will be like : PINALSIGYAHRPI
Looks like your connection to LeetCode Discuss was lost, please wait while we try to reconnect.