OHANISER - Ohani And The Series
Now a days, Ohani has become very expert in mathematics. Her teachers like her very much because of her excellent performance.
One day, one of her teacher gave her a problem to solve. He will give Ohani a number N. This will represent a table of N rows. The first row contains number from 1 to N. Then the next line will contain N-1 numbers, In the second row, the first number will be the summation of the first two numbers (1 + 2) of the previous row, the second number will be the summation of the second two numbers (2 + 3) of the previous row and so on. Row 3 will have N-2 numbers with same procedures. Same procedure follows for row 4, row 5, .... , row N. On the last row, there will be only a single number. Ohani has to tell that only number of the Nth row.
For example: If N = 4, then the table is:
1 2 3 4
3 5 7
8 12
20
So Ohani has to answer the last remaining number: 20.
She can answer when N is small, but can't when N is large. Can you help her?
Input
The first line contains the number of testcases T (T <= 100000).
Each of the test cases contain a number N where 1 <= N <= 100000.
Output
You have to output the case number and the required answer. As the number can be very large, output the answer modulo 1000000007.
Example
Input: 2
1
2 Output: Case 1: 1
Case 2: 3
hide comments
rishabh_1997:
2016-07-07 06:48:48
Learnt modular exponentiation... Also good precomputation of formula |
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vineetpratik:
2016-07-04 14:40:58
make a formula->get tle->use modular exp->ac |
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KD :
2016-05-25 12:10:09
AC in one go :P
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samanway1996:
2016-05-09 18:34:32
Only precomputation is enough... no modular exponentiation is needed :-P |
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Anant Upadhyay:
2015-08-03 10:31:43
Use modular exponentiation
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Dhruv k14:
2015-03-05 20:36:46
Not typing "Case n: " cost me 5 WAs aaaaaaargghhh
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Roy Rohit:
2015-02-10 19:19:06
what is the answer for 100000??? Last edit: 2015-02-10 19:19:27 |
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Raj Kumar Chauhan:
2015-02-01 16:04:04
TLE, WA, Overflow again and again :(
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pk:
2015-02-01 09:51:29
my 100 on spoj :)
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Aman:
2015-02-01 08:48:40
My 50th one .... :) |
Added by: | Raihat Zaman Neloy |
Date: | 2014-10-16 |
Time limit: | 0.5s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |