#include<cstdio>
long long power[55];

int main(){
    long long n;
    scanf("%lld",&n);
    long long ans = n;
    for(int i = 0; (1ll<<i) <= ans; i++){
        for(int j = 1; j <= i+1; j++){
            for(int k = i; k >= 0; k--){
                long long sum = 0;
                for(int l = 0; l < j; l++){
                    if(k-l<0) break;
                    else sum += (1ll<<(k-l));
                }
                power[k] = sum;
            }
            long long left = n;
            long long offer = 0;
            for(int k = i; k >= 0; k--){
                if(left>=power[k]){
                    left -= power[k];
                    offer += (1ll<<k);
                }
            }
            if(left==0 && ans>offer) ans = offer;
        }
    }
    printf("%lld\n",ans);
    return 0;
}