#include<stdio.h>
#define MAX 100000
int partition(int, int);

int n, A[MAX];

int main(){
  int i,q;

  scanf("%d", &n);

  for(i=0;i<n;i++)scanf("%d", &A[i]);
  q=partition(0,n-1);
  
  for(i=0;i<n;i++){ 
    if(i!=q && i!=n-1)printf("%d ", A[i]);
    else if(i==q && i!=n-1)printf("[%d] ", A[i]);
    if(i==n-1)printf("%d", A[i]);
   
  }

  printf("\n");
  return 0;
}


int partition(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 = i+1;
      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;
}

