#include <stdio.h>

int partition(int*, int, int);

int main(){
  int i,n,A[100000],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;
}

int partition(int* A, int p, int r){
  int x,i,j,tmp1,tmp2;
  x=A[r];
  i=p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i+=1;
      tmp1=A[i];
      A[i]=A[j];
      A[j]=tmp1;
    }
  }
  
  tmp2=A[i+1];
  A[i+1]=A[r];
  A[r]=tmp2;
  return i+1;
}

