CEN254 Final Exam |
Start: June.23.2017 at 12:25:00 PM
Finish: June.23.2017 at 01:25:00 PM
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Time limit 2000/4000/4000/4000 ms. Memory limit 65000/65000/65000/65000 Kb.
Question by Ibrahim Mesecan.
Sum is equal to K - 1
Math professor of your brother gave a homework
for kids. The professor gives n numbers, and he asks
if number k can be produced by adding or subtracting
any given number.
Question:
Write a program that is going to get information and
decide if it's possible to calculate the given
number k or not.
Input specification
In the first line, you will be given two integers: The
number of numbers(n) and the number (k) to calculate
where 0 ≤ n ≤ 17 and -20,000 ≤ k ≤ 20,000.
Then, in the following line, you will be given n
integers where each number is between -10,000
and 10,000.
Output specification:
Show "No", if it is not possible to calculate k.
Otherwise, show "Yes".
Note: Each input number
can be used only once.
Sample Input I
4 7
1 2 3 5
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Sample Input II
4 8
1 2 3 10
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Sample Output I
Yes
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Sample Output II
Yes
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Explanation: For sample input 1:
5 + 2 = 7 or 5 + 3 - 1 = 7
For sample input 2:
10 - 2 = 8 or 10 - 3 + 1 = 8
Для отправки решений необходимо выполнить вход.
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