#include <stdio.h>
#define N 100000
int A[N];
int partition(int,int);

int main(){
  int i,n,ans;
  scanf("%d",&n);

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

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

int partition(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;
}

