AGPC01G - Eat Pray Love
One of your friends was in relationship with multiple people at once and it didn’t end very well. Thus he/she chose the path of righteousness and decided to stay in only one relationship or stay single. But not only that, he/she became a motivational speaker and formed an organization to help people to walk through this path.
N people joined his/her organization. He/She takes one person and he/she either pairs that person up with another person in a relationship or keeps that person single. Let’s assume that every person can be paired up with every other person. In how many ways he/she can do that?
Input
First line of input will be T (1<= T <= 100000), denoting the number of test cases.
Next T lines will contain one integer N (1<= N <= 100000) per line.
Output
For each test case print correct answer describe in the description. As, output can be large. Print it modulo 1000000007.
Example
Input: 2 3 100000 Output: 4 823421181
Explanation
For case one, let’s assume they are numbered 1 2 and 3.
Formation can be:
{1} {2} {3} // every person is single
{1} {2, 3} // one is single and two other is in a relationship
{1, 2} {3} // one is single and two other is in a relationship
{1, 3} {2} // one is single and two other is in a relationship
Thus answer is 4.
hide comments
kushagrasri:
2019-01-08 22:10:37
precomputation, where each element is related to the last 2 elements. thanks, @roopammishra. Last edit: 2019-01-08 22:11:06 |
|
roopammishra:
2019-01-08 14:12:43
Take paper and pen, observe the pattern and you will be done!! |
|
charraster:
2018-04-07 19:29:54
why not 4 and 303861760
|
|
charlles:
2017-12-11 15:30:51
Just calculate the power set |
Added by: | imranziad |
Date: | 2017-04-04 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
Resource: | AIUB Girls Programming Contest - Spring 2016-17 |