Count number of binary strings

#1

getting wrong answer on 2 test cases

#2

actually this question is beautiful example of fibonacci series
after solving some example you understand patterns in nothing but fibonacci series
so just write the code of fibonacci series

#3

yes I am aware of that but what’s wrong with this?

#4

home constraints are large
1<=n<=90
so ans will exceed the limt of int hence instead of int use long long int

#5

i even tried using fibonacci logic but its again failing on first 2 test cases

#6

have you tried this?

#7

this is modified code
i have only use long long int instead of int


this is passing all test cases

1 Like
#8

thank you,working now!

1 Like
#9

why i cant see your code.?
only the ide opens