ll s;
void f(ll h,ll d[1<<20]){
	ll n=1;
	d[0]=0;
	rep(i,h){
		ll@a;
		s+=a;
		REP(j,n){
			d[n++]=d[j]+a+(1ll<<54);
		}
	}
	sortA(n,d);
}
{
	ll@n;
	ll h=n/2;
	ll ad[1<<20];
	ll bd[1<<20];
	f(h,ad);
	f(h,bd);
	ll z=ll_inf;
	ll ai=0,bi=(1<<h)-1;
	while(ai<1<<h&&bi>=0){
		ll c=(ad[ai]+bd[bi])*2-(s+(h<<54)*2);
		z<?=abs(c);
		if(c<0){
			++ai;
		}else{
			--bi;
		}
	}
	wt(z);
}