UVa 10940

#include <bits/stdc++.h>
using namespace std;

typedef long long int      ll;

#define read()             freopen("input.txt", "r", stdin)
#define write()            freopen("output.txt", "w", stdout)

void fastIO()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}

int main()
{
    //read();
    //write();
    fastIO();
    int n,x;
    while(cin>>n && n){
        x=1;
        while(x*2<=n) x*=2;
        if(x!=n){
            n-=x;
            n*=2;
        }
        cout<<n<<'\n';
    }
    return 0;
}