#include <stdio.h>

int partition(int *, int, int);

int main(){
  int n, i, k;
  int A[100000];

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

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

  for(i=0; i<n; i++){
    if(i == k) printf("[%d]", A[i]);
    else printf("%d", A[i]);
    if(i != n-1) printf(" ");
  }
  printf("\n");
  
  return 0;
}

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