#include <stdio.h>

#define MAX 100000

int partition(int, int);

int A[MAX], n;

int main(){
  int i, q;

  scanf("%d",&n);
  for(i=0; i<n; i++) scanf("%d",&A[i]);

  q = partition(0, n-1);

  for(i=0; i<n; i++){
    if(i==q) printf("[");
    if(i<n-1&&i!=q) printf("%d ",A[i]);
    if(i==q) printf("%d",A[i]);
    else if(i==n)printf("%d\n",A[i]);
    if(i==q) printf("]");
  }
  
  return 0;
}

int partition(int p, int r){
  int x, i, j, t;
  x = A[r];
  i = p-1;
  for(j=p; j<r; j++){
    if(A[j]<=x){
      i++;
      t = A[i];
      A[i] = A[j];
      A[j] = t;
    }
  }
  t = A[i+1];
  A[i+1] = A[r];
  A[r] = t;
  return i+1;
}

