Count number of binary string

#1

not getting right output .
ide: https://ide.codingblocks.com/s/193504

#2

@Vishal123 try returning DP[n] instead of n-1

#3

only one test case has passed

#4

@Vishal123 Send me your updated code.

#5

i submit it again and it has passed .

#6

@Vishal123 Great work.