#include <stdio.h>
#define N 100000

int A[N];

int Partition(int A[],int p,int r){
    int x,i,j;
    int tmp;
    
    x=A[r];
    i = p-1;
    
    for(j=p;j<r;j++){
        if (A[j] <= x){
            i=i+1;
            tmp=A[j];
            A[j]=A[i];
            A[i]=tmp;
        }
    }

        tmp=A[i+1];
        A[i+1]=A[r];
        A[r]=tmp;
        
    
    
    return i+1;
}


int main(int argc, char *argv[]){
    int n,i,x;
    
    scanf("%d",&n);
    if(1>n || n>100000)return 0;
    
    for(i=0;i<n;i++){
        scanf("%d",&A[i]);
    }
    
    
    x=Partition(A,0,n-1);
    
    for(i=0;i<x;i++){
        printf("%d ",A[i]);
    }
    printf("[%d] ",A[x]);
    
    for(i=x+1;i<n-1;i++){
        printf("%d ",A[i]);
    }
    printf("%d\n",A[n-1]);
    
    return 0;
}//End of main