#include <stdio.h>
#define N 100000

int partition(int,int);

int A[N];

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

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