Submission #394410

#	Time	Username	Problem	Language	Result	Execution time	Memory
394410		jsannemo	Gap (APIO16_gap)	C++14	70 / 100	73 ms	2444 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

vector<ll> qs;

pair<ll, ll> query(ll lo, ll hi) {
	pair<ll, ll> res;
	MinMax(lo, hi, &res.first, &res.second);
	/// cerr << "q " << lo << " " << hi << endl;
	if (res.first != -1) {
		qs.push_back(res.first);
		if (res.first != res.second) qs.push_back(res.second);
	}
	return res;
}

long long findGap(int T, int N) {
	if (T == 1) {
		ll lo = 0;
		ll hi = 1'000'000'000'000'000'000;
		for (int i = 0; i < (N + 1) / 2; ++i) {
			tie(lo, hi) = query(lo, hi);
		}
	}
	if (T == 2) {
		ll lo = 0;
		ll hi = 1'000'000'000'000'000'000;
		tie(lo, hi) = query(lo, hi);
		++lo;
		--hi;
		for (int k = N - 1; k >= 1; --k) {
			ll nask = lo + (hi - lo) / k;
			query(lo, nask);
			lo = nask + 1;
		}
	}
	sort(all(qs));
	ll res = 0;
	rep(i,0,sz(qs) - 1) res = max(res, qs[i + 1] - qs[i]);
	return res;
}

• Subtask 1: 0 / 30
• Subtask 2: 70 / 70