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Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб.  Question by Ibrahim Mesecan. 
  
 
Nr of Missing Guests
You are organizing a meeting and there are 4 tables 
of people. Different number of people are going to 
sit around every table, a, b, c, and d. There are a 
few minutes to the meeting and you count current number 
of people sitting, k, l, m, and n. 
  
Question: Calculate and show the number of
missing people. 
Input specification 
Firstly, you will be given four integers: a, b, c, 
and d the number of people who can sit around each 
table. Then, you will be given four other numbers 
where all numbers are between 0 and 20.
 Output specification 
Show just one number: total
number of missing people.
  
 
Sample Input 1 
3 5 4 5 
1 4 2 5
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Sample Input 2 
4 3 5 4 
4 3 4 3
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Sample Output 1 
5
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Sample Output 2 
2
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 Для отправки решений необходимо выполнить вход.
  
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