#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;
    
}
