#include <stdio.h>

int Partition(int p,int r);

int A[100000];
int n;

main(){
  int i,p;
  scanf("%d",&n);

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

  p = Partition(0,n-1);

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

  return 0;
}

int Partition(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;

}