#include<stdio.h>
int partition(int *,int,int);
int main(){
    int n,i;
    int ret;
    scanf("%d",&n);
    int A[n];
    for(i=0;i<n;i++)scanf("%d",&A[i]);

    ret=partition(A,0,n-1);

    for(i=0;i<n;i++){
        if(i>0)printf(" ");
        if(i==ret)printf("[");
        printf("%d",A[i]);
        if(i==ret)printf("]");
    }
    return 0;
}

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