#include<stdio.h>
#define YOSHI 1000000

int A[YOSHI],n;
int partition(int,int);

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;
}

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;
}


