Question statement is wrong. Right que is in comment body


#1

Question statement is incomplete!

Basically we have to find if its possible to reach rightmost bottom cell from 0,0. If yes return length of longest path else return -1.

P.S. all paths from 0,0 to n-1,m-1 will have same length as we can travel only down or right so you can just return n+m-1 as well. Either approach will work.

Pretty easy!


#2

thanks for this. it was so confusing to understand what “if a path exists” meant.