#include <stdio.h>
#define N 100000

int A[N],x;		    

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

int main()
{
  int n,i,result;
  scanf("%d",&n);
  for(i = 0; i < n; i++){
    scanf("%d",&A[i]);
  }
  result = part(0,n-1);
  for(i = 0; i < n - 1;i++){
    if(result == i) printf("[%d] ",A[i]);
    else printf("%d ",A[i]);
  }
  printf("%d\n",A[i]);
  return 0;
}

