Submit | All submissions | Best solutions | Back to list |
FIBTWIST - Fibonacci With a Twist |
Fibonacci numbers are given by
- f(n) = f(n-1) + f(n-2)
with f(0) = 0 and f(1) = 1.
first number of series ------ 0 1 1 2 3 5 8 13
Now let's have a new series called "Fibonacci Twist" which is given by
- ft(n) = ft(n-1) + ft(n-2) + (n-1)
with ft(0) = 0 and ft(1) = 1.
with first few number in the series ----- 0 1 2 5 10 19 34 59
Now your task is to find ft(n).
Since the number can be big you have to find the result mod M.
Input
first line having single number 't' -- number of test cases.
Next t lines have 2 number each 'n' and 'M'
Output
Single number given the n-th term mod M
Example
Input: 3 5 20 10 77 15 111 Output: 19 45 69
Constraints
- 10 <= t <= 100
- 0 <= n <= 10^9
- 100 <= M <= 10^9
Explanation
- ft(5) is 19. 19 % 20 = 19
- ft(10) is 276. 276 % 77 = 45
- ft(15) is 3177. 3177 % 111 = 69
Added by: | Devil D |
Date: | 2012-04-19 |
Time limit: | 0.100s-1s |
Source limit: | 20000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Own |
hide comments
|
||||||||
2013-05-09 07:11:50 Arika Saputro
can reduced to 2x2 matrix ;D |
||||||||
2013-05-01 13:10:08 Brian Curcio
One of my accepted solutions is actually giving wrong answer. Test cases are weak 1 456564654 999999999 -121092846 Last edit: 2013-05-01 13:10:54 |
||||||||
2013-02-27 18:19:34 yaswanth
0.03 AC :) |
||||||||
2013-02-18 06:23:39 errorcode15
Last edit: 2013-02-18 09:13:27 |
||||||||
2013-02-01 09:16:13 Pankaj Gudlani
more test cases please... it is giving WA... :( |
||||||||
2013-01-22 09:49:11 符号器
@pranshul..agreed with u... |
||||||||
2012-12-19 05:37:41 $!:D
O(n) giving tle :( is dere any other way to do it ? Last edit: 2012-12-19 05:38:11 |
||||||||
2012-12-18 10:12:27 triveni
for those , getting wrong answer: use mod(%) function cleverly . This may give wrong answer. I got one WA for that.. finally AC :) |