#include <stdio.h>
#include <stdlib.h>

int pertition(int*, int, int);

main(){
  int n, i, r, *A;

  scanf("%d", &n);
  A = malloc(sizeof(int)*n);
  for(i=0; i<n; i++) scanf("%d", A+i);

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

  for(i=0; i<n; i++){
    if(i==r) printf("[%d]", A[i]);
    else printf("%d", A[i]);

    if(i != n-1) printf(" ");
    else printf("\n");
  }

  free(A);
  return 0;
}

int partition(int *A, int p, int r){
  int x = A[r];
  int i = p-1;
  int j, tmp;

  for(j=p; j<r; j++){
    if(A[j] <= x){
      i = i+1;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }
  tmp = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp;

  return i+1;
}