#include <iostream>
#include <math.h>
#include <string.h>
using namespace std;
typedef long long LL;
int get1Nums(LL n)
{
	char S[100];
	memset(S,'\0',100);
	sprintf(S,"%x",n);
	int num=0;
	char *p=S;
	while (*p!='\0'){
		switch(*p){
			case '1'://0001
			case '2'://0010
			case '4'://0100
			case '8'://1000
				num+=1;
				break;
			case '3'://0011
			case '5'://0101
			case '6'://0110
			case '9'://1001
			case 'a'://1010
			case 'c'://1100
				num+=2;
				break;
			case '7'://0111
			case 'b'://1011
			case 'd'://1101
			case 'e'://1110
				num+=3;
				break;
			case 'f':
				num+=4;
				break;
		}
		p++;
	}
	return num;
}
int main(int argc, char* argv[])
{
	int p;
	cin>>p;
	LL v=pow(2.0,p)-1;
	cout<<get1Nums(v)<<endl;
	return 0;
}