#include <stdio.h>

#define N 100000

int partition(int*,int,int);

int main(){
  int A[N];
  int i,j,n;

  scanf("%d",&n);

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

  j = partition(A,0,n-1);

  for(i=0;i<n;i++){
    if(i!=0) printf(" ");
    if(i==j) printf("[%d]",A[i]);
    else printf("%d",A[i]);
  }

  printf("\n");
  return 0;
}

int partition(int* A,int p,int r){
  int x,i,j;
  int temp;
  x = A[r];
  i = p-1;

  for(j=p; j<r; j++){
    if(A[j] <= x){
      i++;
    temp = A[i];
    A[i] = A[j];
    A[j] = temp;
    }
  }
    temp = A[i+1];
    A[i+1] = A[r];
    A[r] = temp;

  return i+1;

}