PSYCHO3 - Make Psycho
Problem Statement
The number N is called Psycho Number. Psycho Number is calculated as follows:
First, If we factorize N, then we have some prime and their power. Assume that, there are M powers. From M powers, you should count the number of even and odd powers. Then if the number of even power is strictly greater than odd power, then we call the number N is “Psycho Number”, otherwise the number N is call “Ordinary Number”.
As for example, if N = 67500 then prime factorization,
67500 = 22 x 33 x 54.
Count even powers and odd powers. This number have 2 even power (2, 4) and 1 odd power (3). Since even power 2 (2, 4) is greater than odd power 1 (3), so the number 67500 is a Psycho Number.
Now, Given an integer K, your task is to find whether it is possible to form a subset consisting of only psycho numbers that sum up to exactly K, or not.
Note: 0 and 1 are not psycho numbers.
Input
The first line of the input contains an integer, T (1 ≤ T ≤ 2000) indicating the number of test cases. For each test case, two lines appear, the first one contains a number N (1 ≤ N ≤ 100), representing the length of the numbers, and K (1 ≤ K ≤ 105). The second line of each test case contains the sequence of integers p1, p2, ..., pn (0 ≤ pi ≤ 1100). It's a mix of psycho and ordinary numbers.
Output:
For each case print “Yes” if possible to make K, otherwise “No”.
Example
Sample Input 3 5 20 4 5 12 20 16 5 3 3 5 9 2 7 3 24 4 4 16 Sample Output Yes No Yes
Explanation
1st test case: psycho numbers: 4 and 16. Possible numbers: 4, 16 and 20 (4+16). k is 20 so you can make this number.
2nd test case: psycho numbers: only 9. k is 3 but it's not possible to make subset of psycho numbers with sum equal to k.
3rd test case: psycho numbers: 4 4 16. Possible numbers: 4, 16, 20 (16 + 4) and 24 (16 + 4 + 4). k is 24 so you can make this number.
Psycho 1: Psycho
Psycho 2: Psycho Function
Problem setter: Shipu Ahamed, Dept. of CSE
Bangladesh University of Business and Technology (BUBT)
hide comments
[Lakshman]:
2014-05-13 17:12:21
@Shipu Ahamed What is the expected complexity? My initial AC solution TLE now.
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যোবায়ের:
2014-05-13 17:12:21
problem statement needs refinement.
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Shipu Ahamed:
2014-05-13 17:12:21
dataset update and rejudge .............. plz check everyone |
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Jacob Plachta:
2014-05-13 17:12:21
The problem seems to never say what you're actually trying to do... You need to determine whether or not there exists a subset of the N numbers, consisting only of psycho numbers, which sum to K.
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Added by: | Shipu Ahamed |
Date: | 2013-11-17 |
Time limit: | 0.5s |
Source limit: | 9000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |