#include <bits/stdc++.h>
#define INT long long int
using namespace std;
INT n, a[5050], x, y;
int main() {
  srand(time(NULL));
  cin>>n>>x>>y;
  freopen(".10.in","w",stdout);
  cout<<n<<" "<<x<<" "<<y<<endl;
  for(int i = 0 ; i < n ; i++ )
    cout<<(a[i]=rand())<<" "; cout<<endl;
  freopen(".10.out","w",stdout);
  //for(int i = 0 ; i < n ; i++ ) cin>>a[i];
  if( n == 1 ) cout<<abs(a[0]-y)<<endl;
  else  cout<<max(abs(a[n-1]-y), abs(a[n-2]-a[n-1]));
}