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
hide comments
sobriquet:
2014-07-01 12:03:03
Learned a lot of new things.If getting WA, use MOD carefully.Very good problem. |
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Rahul Ranjan:
2014-05-31 18:05:26
getting WA at test case 7....help pls
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`Ak:
2014-05-24 10:35:16
I am too getting wa at running 7 any tricky test case ??? |
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Shreyans:
2014-01-02 08:16:37
WA on running...(7)
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sagar baver:
2013-11-27 16:22:55
for all gettin WA: use mod carefully!! |
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AlcatraZ:
2013-11-03 21:09:20
It is indeed a "Fibonacci With a Twist". |
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Pranab Kumar:
2013-09-06 09:52:23
ID:9992546...Pls tell why my answer is wrong showing here. Is that due to this
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@looser@:
2013-08-07 17:44:24
plz give me more test case
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vaibhav gupta:
2013-07-01 15:32:38
Same code is giving TLE and wrong ans..!Don't know what to do..!? |
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(Tjandra Satria Gunawan)(曾毅昆):
2013-05-09 09:44:05
server is very unstable, exact same code: 0.99s, then 0.97s, and finally 0.21s using recurrence order 2, written in PYTH 2.7 |
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 |