Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Fibonacci, Astronomically

Fibonacci, Astronomically

Difficulty: 1800 2000 ms 128 MB

math

Print F(N) mod 109+7 where F(0)=0, F(1)=1 — and N is up to 1018, so linear iteration is hopeless.

Input: one integer N.

Output: F(N) mod 109+7.

Constraints:

  • 0 ≤ N ≤ 1018

Sample Tests

Input 1
10
Output 1
55
Input 2
0
Output 2
0

Read the Editorial Statistics

Discussion (opens after you solve — no spoilers before)

No comments yet.

Submit Your Solution

Log in or create a free account to run and submit code.
Ctrl+Enter submit · Ctrl+Space autocomplete · F11 fullscreen