#include<stdio.h>
#define N 100001

int A[N];

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;
}

int main(){
  int n, i, q;
  scanf("%d", &n);
  for(i = 0; i < n; i++) scanf("%d", &A[i]);
 q = Partition(A, 0, A[i - 1]);
  for(i = 0; i < n; i++){
    if(i == q) printf("[%d]", A[i]);
    else printf("%d", A[i]);
    if(i < n - 1)printf(" ");
  }
  printf("\n");
  return 0;
}