#include<stdio.h>
#define N 200000
int partition(int *,int ,int );

int main(){
    int a,b,i,A[N];

    scanf("%d",&a);
    for(i = 0;i < a;i++){
        scanf("%d",&A[i]);
    }

    b = partition(A,0,a - 1);

    for(i = 0;i < a;i++){
        if(i == a - 1)printf("%d\n",A[i]);
        else if(i == b)printf("[%d] ",A[i]);
        else printf("%d ",A[i]);
    }
    return 0;
}
int partition(int *A,int p,int r)
{
    int x,i,j,a;
    x = A[r];
    i = p - 1;
    for(j = p;j <= r - 1;j++){
        if(A[j] <= x){
            i = i + 1;
            a = A[i];
            A[i] = A[j];
            A[j] = a;
        }
    }
    a = A[i+1];
    A[i+1] = A[r];
    A[r] = a;

    return i+1;
}
