#include <stdio.h>
#define MAX 100000

int A[MAX], n;

int partition(int p, int r){
    int x,i,j,t;
    x = A[r]; //比較対象の数字
    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[r];A[r]=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;
}

