#include<stdio.h>
#define MAX 100000

int A[MAX],N;

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

int main(){
  int i,b;

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

  b=partition(0,N-1);

  for(i=0;i<N;i++){
    if(i)printf(" ");
    if(i==b)printf("[%d]",A[i]);
    else printf("%d",A[i]);
  }
  printf("\n");

  return 0;
}
