#include <stdio.h>
#define MAX 100000
int A[MAX];
int n;

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

      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-1; i++){
      if(i == q) printf("[");
      printf("%d", A[i]);
      if(i ==q)printf("]");
      printf(" " );
  }

    printf("%d\n",A[n-1]);

  return 0;

}