#include<stdio.h>

int PRT(int *,int,int);

int main(){
int i,j,q,A[100000],n;

scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }

  q = PRT(A,0,n-1);
for(i=0;i<q;i++){
    printf("%d ",A[i]);
}
printf("[%d]",A[q]);

for(i=q+1;i<n;i++){
    printf(" %d",A[i]);
}
printf("\n");
return 0;
}

int PRT(int *A,int p,int r){
    int i,j,x,tmp;

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