#include<stdio.h>

int A[100000];

int par(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;
}

int main(){
  int i,n,key;

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

  printf("[%d] ",A[key]);
  for(i=key+1;i<n-1;i++)
    printf("%d ",A[i]);
  printf("%d\n",A[n-1]);
  
  return 0;
}

