#include <stdio.h>

int main(){
	long long num = 0;
	scanf("%lld",&num);
	
	long long normal = 0;
	long long skil = num * 2;
	
	long long xp = num;
	while(xp != 0){
		normal += xp;
		xp /= 2;
	}
	
	if(normal <= skil){
		printf("%lld",skil - normal);
	}else{
		printf("%lld",normal - skil);
	}
}