Iasi 2019 SI 2c

#include <iostream>

using namespace std;
int F(int n,int t){
   if(n==0) return 0;

   if(n%2==0)
        return F(n/2,t*2)+t;
    else
        return F(n/2,t*2);

}
int main() {
    int n,p=1;
    cin >> n;
    cout<<F(n,1);
    return 0;
}