C :

#include <stdio.h>
int main() {
	int n;
	while(scanf("%d",&n)!=EOF) {
		int sum = n;
		while(n!=1) {
			if(n%2==1) {
				sum ++;
				n = (n+1)/2;
				sum += n;
			} else {
				n = n /2;
				sum += n;
			}
		}
		printf("%d\n",sum);
	}
	return 0;
}