#include <stdio.h>
#define MAX 100000

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

int main(){
  int n, p, i;
  scanf("%d",&n);
  for(i = 0; i < n; i++){
    scanf("%d",&A[i]);
  }

  p = patition(0,n-1);

  for(i = 0; i < p; i++){
    printf("%d ",A[i]);
  }

  printf("[%d]",A[p]);
  
  for(i = p + 1; i < n; i++){
    printf(" %d",A[i]);
  }
  printf("\n");

  return 0;
}


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

  return i+1;
}