#include<stdio.h>
#define K 100000

int A[K];

int partition(int p,int r){
  int x,i,j,v;
  x = A[r];
  i = p - 1;
  for(j = p;j < r;j++){
    if(A[j] <= x){
      i = i + 1;
      v = A[i];
      A[i] = A[j];
      A[j] = v;
    }
  }
  v = A[i + 1];
  A[i + 1] = A[r];
  A[r] = v;
  return i+1;
}

int main(){
  int n,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 > 0) printf(" ");
    if(i == q) printf("[");
    printf("%d",A[i]);
    if(i == q) printf("]");
  } printf("\n");
  return 0;
}

