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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
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 |
hide comments
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2015-01-23 14:27:50 VISHAL DEEPAK AWATHARE
what is the formula you are talking about? |
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2015-01-18 11:07:51 KK
My 50th |
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2015-01-15 19:31:42 Diksha Jaiswal
modular exponentiation is the key!! AC :) |
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2014-12-29 11:57:19 ROHIT RAJ
learned something new :) |
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2014-12-28 19:44:22 Anand
make a formula -> submit -> if TLE -> then wiki modular exponentiation = AC :) |
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2014-12-26 09:38:54 Abhishek
TLE in python after using formula , Help |
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2014-12-06 06:08:29 [Lakshman]
@ Ravi Teja It is possible with Java with direct formula as well with pre-computation. If you are using direct formula you need fast I/O like BufferedReader inout and output. Try not to use System.out.print it is too slow. Hope this help. EDIT1:: My best with Java fast I/O .10s. Last edit: 2014-12-06 06:09:59 |
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2014-12-05 20:20:52 Ravi Teja
Don't you think the time limit is too strict for Java? Getting TLE even for straightforward formula application |