#include<bits/stdc++.h>
#if __has_include(<atcoder/all>)
#endif
using namespace std;
#define done(...) return pp(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;lin(__VA_ARGS__)
#define FO(n) for(ll IJK=n;IJK-->0;)
#define fo(i,...) for(auto[i,i##stop,i##step]=for_range<ll>(0,__VA_ARGS__);i<i##stop;i+=i##step)
#define defpp template<ostream&o=cout>void pp(const auto&...a){[[maybe_unused]]const char*c="";((o<<c<<a,c=" "),...);o<<'\n';}void epp(const auto&...a){pp<cerr>(a...);}
#define entry defpp void main();void main2();}int main(){my::io();my::main();}namespace my{
#define multiple_testcases LL(T);FO(T)main2();}void main2(){
namespace my{
void io(){cin.tie(nullptr)->sync_with_stdio(0);cout<<fixed<<setprecision(15);}
using ll=long long;
template<class T>constexpr auto for_range(T s,T a,T b,T c=1){return array{a-s,b,(1-s*2)*c};}
void lin(auto&...a){(cin>>...>>a);}
template<class T=ll>T pow2(ll n){return T(1)<<n;}
constexpr auto at2(auto x,auto i){return x>>i&1;}
}
namespace my{
ll mask_range(ll l,ll r){return pow2(r)-pow2(l);}
ll popcount(ll x){return __builtin_popcountll(x);}
ll lsb(ll x){return x?__builtin_ctzll(x):-1;}
}
namespace my{entry
void main(){
  multiple_testcases
  LL(N);
  ll ppc=popcount(N);
  if(ppc==1)done(-1);

  ll X=N-pow2(lsb(N));
  ll a=lsb(X);
  ll b=0;
  fo(i,a,31){
    if(!at2(X,i)){
      b=i;
      break;
    }
  }

  X&=~mask_range(a,b);
  X+=pow2(b);
  pp(X-N);
}}