题解 100% AC

只要$O(1)$!!!

#include<bits/stdc++.h>
using namespace std;
int a[12]={1,2,8,9,6,9,29,39,38,65,88,128};
int main(){
	int n;
	cin>>n;
	if(n<=12)cout<<0;
	else cout<<a[n-13];
    return 0;
}