#include<stdio.h>
#define M 100000

int A[M], n;

int partition(int p, int r){
  int x, i, j, t;

  x = A[r];
  i = p - 1;

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

  return i + 1;
}

int main(){
  int i, q;

  scanf("%d", &n);

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

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

  return 0;
}

