#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++;
      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,q;

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

  q = partition(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;
}

