#include <stdio.h>
#define N 100000
int A[N];

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

int main(){
  int i,k,n,p;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);
  p=Partition(A,0,n-1);

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

