### PilotCoder's blog

By PilotCoder, history, 2 months ago,

In the official tutorial, we defined a dp[i][j] array which means that we consider 1~i and has j elements that haven't been deleted, I just want to ask if it is possible to solve it by redefined the dp: consider 1~i and has already use j moves. Could anyone tell me if my idea is possible to solve problem?

• +10

 » 2 months ago, # |   +5 Yes, my submission 123591691 does that.
•  » » 2 months ago, # ^ |   +10 Ok, thanks very much for chase my doubt away!!!
 » 2 months ago, # |   +10 It's the same thing, because if $j$ moves have been used then $i - j$ elements haven't been deleted.