#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int partition(int p,int r){
    int x, i, j, t;
    x = A[r];
    i = p-1;
    for(j=p; j<r; j++){
        if(A[j]<=x){
            i++;
            t=A[i];
            A[i] = A[j];
            A[j] = t;
        }
    }
    t = A[i+1];
    A[i+1] = A[j];
    A[j] = t;
    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; i++){
        if(i){
            printf(" ");
        }
        if(i ==q){
            printf("[");
        }
        printf("%d",A[i]);
        if(i == q){
            printf("]");
        }
    }
    printf("\n");

    return 0;
}
