#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[j]; A[j] = A[i]; A[i] = t;
        }
    }
    t = A[i+1]; A[i+1] = A[r]; A[r] = t;
    return i+1;
}

int main(){
    int i,q;

    scanf("%d", &n);
    for(int 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;
}

