#include <stdio.h>

#define MAX 100000

int partition(int, int);

int A[MAX], n;

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==q) printf("[");
    if(i<n-1&&i!=q) printf("%d ",A[i]);
    if(i==q) printf("%d",A[i]);
    else if(i==n)printf("%d\n",A[i]);
    if(i==q) printf("] ");
}

return 0;
}

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;
}

