#include<stdio.h>

#define N 100000

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


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

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