why?

#include <iostream>
#include <cmath>
using namespace std;
#define SWAP(A, B) { int t = A; A = B; B = t; }

void bubblesort(int *a, int n)
{
  int i, j;

  for (i = n - 1; i > 0; i--)
  {
    for (j = 0; j < i; j++)
    {
      if (a[j] > a[j + 1])
        SWAP( a[j], a[j + 1] );
    }
  }
}
int main()
{
int n,x,ar[100];
cin>>n>>x;
for(int i=0;i<n;i++)
cin>>ar[i];
bubblesort(ar,n);
int j=0;
while(ar[j]<0 && j<n-1)
    ++j;
if(ar[j-1]<x && ar[j]>x && n!=1 )
{
    if(x<0)
    cout<<2*ar[j]-x<<" "<<0-x;
    else
        cout<<x<<" "<<abs(2*ar[j-1])+x;
}
else
    if(n==1)
    {
    if(ar[0] > x)
        cout<<2*abs(ar[0])-x<<" "<<-x;
    else
        cout<<x<<" "<<2*abs(ar[0])+x;
    }
    else
    cout<<"Impossible";
}

I am also get WA#13.I don't understand why. Please help me.
My code is


#include"iostream"
using namespace std;
int main()
{
    int x[100];
    int n, x0;
    cin>>n;
    cin>>x0;
    if(n==0){cout<<"Impossible";
        return 0;}
    for(int i=0;i<n;i++)
        cin>>x[i];
    if(n==1)
    {
        n=2;
        x[1]=x0;
    }
    for(int i=0;i<n;i++)
        for(int j=i+1;j<n;j++)
            if(x[j]<x[i])
            {
                int t=x[i];
                x[i]=x[j];
                x[j]=t;
            }
            int i=0;
            for(;i<n-1;i++)
            {
                if(x0>=x[i]&&x0<=x[i+1])
                 {
                     if(x[i]<=0&&x[i+1]>=0)
                     {
                         if(x0>0)
                         {
                             cout<<x0<<' '<<x0+abs(2*x[i]);
                             return 0;
                         }
                         else
                         {
                             cout<<2*x[i+1]+abs(x0)<<' '<<abs(x0);
                             return 0;
                         }
                     }
                }
            }
            cout<<"Impossible";
    return 0;
}