#include<stdio.h>
#define MAX 100000

int partition(int *A,int p,int r){
  int x,i,j,a;

  x = A[r];
  i = p-1;
  for(j=p;j<r;j++){
    if(A[j] <= x){
      i = i+1;
      a = A[i];
      A[i] = A[j];
      A[j] = a;
    }
  }
  a = A[i+1];
  A[i+1] = A[r];
  A[r] = a;
  return i+1;
}
  
int main(){
  int A[MAX],i,n,q;

  scanf("%d",&n);

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

  q = partition(A,0,n-1);

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

  return 0;
}

