#include<stdio.h>

#define X 100000

int partition(int [], int, int);

int main(){
  int i, n, p=0, q, r;
  int A[X];

  scanf("%d",&n);
  r = n-1;
  for(i=0; i<n; i++){
    scanf("%d",&A[i]);
  }
  q = partition(A, p, r);

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

int partition(int A[], int p, int r){
  int i, j, a, b, A2;
  
  A2 = A[r];
  i = p-1;
  for(j=p; j<r; j++){
    if(A[j] <= A2){
      i = i+1;
      a = A[i];
      A[i] = A[j];
      A[j] = a;
    }
  }
  b = A[i+1];
  A[i+1] = A[r];
  A[r] = b;
  return i+1;
}

