#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;
}

