#include <stdio.h>
#define MAX 100001

int A[MAX],n;

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

int main(){
  int i,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;i++){
    if(i) printf(" ");
    if(i == q) printf("[");
    printf("%d",A[i]);
    if(i == q)printf("]");
  }
  printf("\n");
  return 0;
}