#include<stdio.h>
#include<stdlib.h>
int partition(int*, int, int);
main() {
  int n,i,j,q,x;
  int *A;

  scanf("%d",&n);
  A = (int*)malloc(sizeof(int)*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("[%d]",A[q]);
  for(i = q+1; i < n; i++) {
    if(i > q) printf(" ");
    printf("%d",A[i]);
  }
  printf("\n");
  free(A);
  return 0;
}

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

      c = A[i];
      A[i] = A[j];
      A[j] = c;
    }
  }
      c = A[i+1];
      A[i+1] = A[r];
      A[r] = c;
      return i+1;
}