#include <stdio.h>
int partition(int*,int,int);
int main(){
  int n,i,x;
  int A[100000];

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

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

  return 0;
}

int partition(int *A,int p,int r){
  int i,j,x,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;
}

