#include<stdio.h>
#define MAX 100000

int partition(int*,int ,int);

int main(){
  int n,i,q;
  int A[MAX];
  
  scanf("%d",&n);

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

  q = partition(A,0,n-1);

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

  printf("\n");

  return 0;
}
    

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