#include<stdio.h>
#define MAX 100000

int A[MAX],n;

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

  k = A[i+1];
  A[i+1] = A[q];
  A[q] = k;
  return i+1;
}


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)printf(" ");
    if(i==q)printf("[");
    printf("%d",A[i]);
    if(i==q)printf("]");
  }

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