#include<stdio.h>
#define MAX 100000

int A[MAX],n;

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

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)       printf(" ");
    if(i==q)    printf("[" );
    printf("%d", A[i]);
    if(i==q)    printf("]" );
  }
  printf("\n");

  return 0;
}

