#P3978. Evil teacher's Final Problem
Evil teacher's Final Problem
Problem Description
In the math class, the evil teacher gave you one unprecedented problem!
Here f(n) is the n-th fibonacci number (n >= 0)! Where f(0) = f(1) = 1 and for any n > 1, f(n) = f(n - 1) + f(n - 2). For example, f(2) = 2, f(3) = 3, f(4) = 5 ...
The teacher used to let you calculate f(n) mod p where n <= 10^18 and p <= 10^9, however , as an ACMER, you may just kill it in seconds! The evil teacher is mad about this. As you kill the Evil teacher.s problem in second too!!! now he let you calculate G(n,k) .Here G(n,0) = f(n) , G(n,i) = f( G(n,i-1) ) (k >= i >= 1). However the G(n,k) may be so large ,so you just need to output the remainder of the answer after divided by p.
Note: This problem is the evil teacher's final problem, it is really hard ! If you could solve this problem during the competition, you will be reward in the ACM_DIY gathering.
Input
The first line is one integer T indicates the number of the test cases. (T <=500000)
Then for every case, three integers n k and p . (0 <= n <= 10^9,0 <= k <= 10^4, 1 <= p <= 10^8)
Output
Output one line.
First output “Case #idx: ”, here idx is the case number count from 1.Then output remainder of the answer after divided by p.
10
1 10000 100000000
2 3 10000
3 97 98
4 2 10
5 1 29
1234 5678 100000000
3344 5566 77889900
10000 10000 100000000
1111 10000 90000000
999 876 10000000
Case #1: 1
Case #2: 2
Case #3: 3
Case #4: 4
Case #5: 5
Case #6: 17835789
Case #7: 5381861
Case #8: 71647609
Case #9: 43710337
Case #10: 9102595
Author
AekdyCoin