#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[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;
}
