#include <stdio.h>

#define MAX 100000

int partition(int A[], 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);

}

int main(){

  int A[MAX],n,i,q;

  scanf("%d",&n);

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

  q = partition(A,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;
}

