#include <stdio.h>
#define N 1000000
int A[N];
int Partition(int p, int r){
  int x, i, j, tmp;
  x = A[r];
  i = p-1;
  for(j = p; j < r; j++){
    if(A[j] <= x){
      i++;
      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, x;
    scanf("%d", &n);
    for(i = 1; i <= n; i++){
      scanf("%d", &A[i]);
    }
    x = Partition(1, n);
    for(i = 1; i <= n; i++){
      if(i == x){
        printf("[%d]",A[i]);
      }
      else
      {
        printf("%d",A[i]);
      }
      if(i < n)
      {
        printf(" ");
      }
    }
    printf("\n");
    return 0;
  }

