#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(void) {
  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;
}
