What can I say...

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
	
	long long int n,c,total=0;
	cin>>n>>c;
	long long int number[n];
	
    for(long long int i=0;i<n;i++)
    {
        cin>>number[i];
    }

   for (long long i = 0; i < n; i++) 
   {         
    for (long long j = 0; j < n; j++) 
    {   
        if (number[i] - number[j] == c) 
        {            
            total++;                       
        }
    }
   }

    cout<<total;
    
    return 0;	
}