Submission #1520243

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> pip;
const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;
const bool debug = 0;
//----------------------//

int main() {
	int x; cin >> x;
	
	ll ans = 2;
	REP(i, x) {
		ll l = 0, r = 1e16;
		while (r - l > 1) {
			ll m = (l + r) / 2;
			if (m - ans - 1 >= ans + 2) r = m;
			else l = m;
		}
		ans = l;
	}
	cout << ans << endl;
	return 0;
}

Submission Info

Judge Result