#include<stdio.h>
#define MAX 100000

int n, A[MAX];

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

