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CTCTF 2015: Lucas's Note

Problem

Points: 75

Description:

note.txt

Hint:

lucas is a pretty cool dude

Solution

Lucas numbers are part of a recursive integer sequence where L_n = L_{n - 1} + L_{n - 2}; this is essentially a Fibonacci sequence with different seed values. Instead of starting with 0 and 1, Lucas numbers start with 2 and 1, giving us the sequence 2, 1, 3, 4, 7, 11, 18, 29, . . . .

What does this have to do with the flag and the file of text that we got? Well, suppose that you combined the characters whose indices were Lucas numbers. We wrote this program to do that.

Flag: LUCASNUMBERSAREPRETTYCOOL

Other Resources

  • None.