Project Euler Forum

Is there a typo at the end of line 3? Should "sum of all P(i,k) over 1 ≤ i,n ≤ n" read "sum of all P(i,k) over 1 ≤ i,k ≤ n"?

CarlEdman wrote:Is there a typo at the end of line 3? Should "sum of all P(i,k) over 1 ≤ i,n ≤ n" read "sum of all P(i,k) over 1 ≤ i,k ≤ n"?

Fixed. Thank you.

Hello,
I am trying to submit an answer to the question, but failed.
My results for the examples as shown in the site are correct.
Can someone please validate a solution for another example.

Is the sum of all S(F(x)) 3 <= x <= 30 equals to 733142762996?

Thank you!

Hi,

I think your result is not correct.
I find 280------657 for the same range [3,30].

Are you sure you are correct?
I got the correct answer for the problem and the answer i get for [3:30] range is 280 ... 713.

naadv wrote:
Is the sum of all S(F(x)) 3 <= x <= 30 equals to 733142762996?

I won't comment on the correctness of any of the numbers, but I will say you might benefit from looking again at the definition of the starting point of the Fibonacci numbers in the problem.

@naadv : I made a mistake.
LilStalker is right, the correct value is : 280------713
Your value is too high.

Thank you all very much for the comments.

Mt results for S(100) and S(1000) match the numbers in the riddle, which made me think I am on the right track.

sjhillier comment really helped me, yet have some more mistakes, probably on large numbers.