#include<stdio.h>
#define MAX 100000

int A[MAX],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;
}

