#include<stdio.h>

#define N 100000

int partition(int A[],int p,int r){
  int x,i,j,temp;

  x = A[r];
  i = p-1;
  for(j=p;j<r;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 n,A[N];
  int i,a;

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

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

    printf("\n");

    return 0;
  }



