#include <stdio.h>
#include <stdlib.h>
#define NMAX 100000

int A[NMAX];
int partition(int q,int r){
  int x,i,j,tmp;
  x=A[r];
  i=q-1;
  for(j=q;j<r;j++){
    if(A[j]<=x){
      i=i+1;
      tmp=A[i];
      A[i]=A[j];
      A[j]=tmp;
    }
  }
  tmp=A[i+1];
  A[i+1]=A[r];
  A[r]=tmp;
  return i+1;
}
int main(){
int n,i=0,j;
int x,y,tmp,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;
}

