#include using namespace std; typedef long long ll; typedef pair p_ll; template void debug(T itr1, T itr2) { auto now = itr1; while(now=0; i--) const ll MOD = pow(10,9)+7; const ll LLINF = pow(2,61)-1; const int INF = pow(2,30)-1; vector fac; void c_fac(int x=pow(10,6)+10) { fac.resize(x,true); rep(i,x) fac[i] = i ? (fac[i-1]*i)%MOD : 1; } ll modpow(ll x, ll p) { ll result = 1, now = 1, pm = x; while (now<=p) { if (p&now) { result = result * pm % MOD; } now*=2; pm = pm*pm % MOD; } return result; } ll inv(ll a, ll m=MOD) { ll b = m, x = 1, y = 0; while (b!=0) { int d = a/b; a -= b*d; swap(a,b); x -= y*d; swap(x,y); } return (x+m)%m; } ll nck(ll n, ll k) { return fac[n]*inv(fac[k]*fac[n-k]%MOD)%MOD; } ll gcd(ll a, ll b) { if (a> D; ll result = D; repr(i,1,61) { ll l = 0, r = pow(10,18); while (l!=r) { // cout << l << " " << r << endl; ll mid = (l+r)/2, tmid = mid; ll d = 0; rep(_,i) { d += tmid; tmid/=2; } if (d>=D) r = mid; else l = mid+1; } ll tl = l, nd = 0; rep(_,i) { nd += tl; tl/=2; } if (nd==D) result = min(result, l); } cout << result << endl; return 0; }