#include <stdio.h>
#define MAX 100000
  
int A[MAX];
  
int partition(int p,int r){
    int x=A[r];
    int i=p-1;
    int j,store;
    for(j=p;j<r;j++){
        if(A[j]<=x){
            i+=1;
            store=A[i];
            A[i]=A[j];
            A[j]=store;
        }
    }
    store=A[i+1];
    A[i+1]=A[r];
    A[r]=store;
    return i+1;
}
  
int main(){
    int n,i;
    int prt;
    scanf("%d",&n);
      
    for(i=0;i<n;i++){
        scanf("%d",&A[i]);
    }
    prt=partition(0,n-1);
      
    for(i=0;i<n;i++){
        if(i==prt) printf("[%d]",A[i]);
        else printf("%d",A[i]);
        if(i>=0&&i<n-1) printf(" ");
    }
    printf("\n");
      
    return 0;
}