#include<stdio.h>

#define MAX 100000

int A[MAX];

int partition(int p, int r){
    int max = A[r];
    int i = p-1;
    int j, tmp;

    for(j=p; j<r; j++){
        if(A[j] <= max){
            i++;
            
            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;
}

int main(){
    int n, i, mark;

    scanf("%d", &n);

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

    mark = partition(0, A[n-1]);

    for(i=0; i<n; i++){
        if(i == mark){
            printf("[%d]", A[i]);
        }else{
            printf("%d", A[i]);
        }
        if(i != n-1) printf(" ");
    }
    printf("\n");

    return 0;
}

