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GOO - Game Of Ones |
Haba and Goba are brothers, they love binary numbers very much. Today is Haba’s birthday so, his uncle gifted him a 3 bit binary string. Getting the present, both of them are very happy. Now, Goba asked Haba that using 3 bits how many different binary numbers he can write, whose 1st bit is 1 and total how many 1 will be needed to write those numbers. Haba answered he can write 4 different numbers using 3 bits whose first bit is 1 and those numbers are 4 (100), 5 (101), 6 (110) and 7 (111) and to write these 4 numbers in binary he will need 8 ‘1’. Now Goba told Haba that he will tell Haba the length of a binary string n and Haba will have to answer that using n bits how many different binary numbers he can write, whose 1st bit is 1 and total how many 1 will be needed to write those numbers. If Haba can answer correctly he will get more binary strings as present. Haba wants to get more binary string as present but, he doesn’t know the answer of the question of Goba for bigger value of n, so now he wants your help. Help him to find the answer.
Input
The first line contains a positive integer number, t (1 ≤ t ≤ 50) indicating the number of test cases. Each test case contains a positive integer number, n (1 ≤ n ≤ 50) indicating the number of bits.
Output
For each test case you have to output two numbers, whose first and second number indicates the answer of Goba’s first and second question respectively.
Example
Input: 2 2 3 Output: 2 3 4 8
Added by: | Rofi |
Date: | 2016-04-27 |
Time limit: | 0.100s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 GOSU JS-MONKEY |
Resource: | Own problem. Used in NHSPC 2016 Final Round. |
hide comments
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2016-06-23 16:40:47
use long long int |
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2016-06-18 17:47:00 Piyush Kumar
Pure combinatorics! |
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2016-06-18 16:34:43
Just apply Permutations and combinations. |
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2016-05-16 22:29:52 Vars
easy one just observe pattern!! |
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2016-05-05 15:25:45 MD. Khairul Basar
@dwij28 Yes, there is a formula. but dp will also pass. |
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2016-04-30 09:23:41
I don't know if there is a formula for it. I made a DP like approach for the AC. Last edit: 2016-05-05 15:26:04 |
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2016-04-29 16:32:59
A general formula will do. Intuitive. |