#include <stdio.h>

int partition(int *, int, int);

int A[100000];

int main(){
  
  int i,a,n;

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

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

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

int partition(int A[], int p, int r){

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

}