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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main()
  4. {
  5.   int n , a[100000] ; 
  6.   cin>>n;
  7.   int tong = 0;
  8.   for (int i=1;i<=n;i++)
  9.     {
  10.       cin>>a[i];
  11.  
  12.     }
  13.     sort(a+1,a+1+n);
  14.     int i=1;
  15.     tong = 0;
  16.     int dem = 0;
  17.  
  18.     while (i!=n)
  19.      {
  20.      	tong = tong + a[i];
  21.      	if (tong>=4) 
  22.      	{ 
  23.      		tong = 0;
  24.      		dem++;
  25.  
  26.      	}
  27.      	else
  28.      	 {i++;}
  29.      }
  30.      cout<<dem;
  31.  
  32.   return 0;
  33. }
Success #stdin #stdout 0s 4388KB
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https://ideone.com/KM58uO
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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