#include<stdio.h>
#define N 100000

int partition(int *A,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=i+1;
            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 n,i,x,q;
    int A[N];
    scanf("%d",&n);
    for(i=0;i<n;i++)scanf("%d",&A[i]);
    x=partition(A,0,n-1);
    for(i=0;i<n;i++){
        if(x==i)printf("[%d",A[i]);
        else if(i!=n-1)printf("%d ",A[i]);
        else printf("%d",A[i]);
        if(x==i)printf("] ");
    }
    printf("\n");
    return 0;
}

