Submission #1196468

#	Time	Username	Problem	Language	Result	Execution time	Memory
1196468		The_Samurai	Gap (APIO16_gap)	C++20	100 / 100	44 ms	1944 KiB

gap

#include "bits/stdc++.h"
#include "gap.h"
using namespace std;
using ll = long long;

long long findGap(int t, int n) {
	if (t == 1) {
		vector<ll> a(n);
		int l = 0, r = n - 1;
		ll lx = -1, rx = 1e18 + 1;
		while (l <= r) {
			ll mn, mx;
			MinMax(lx, rx, &mn, &mx);
			// cout << '\t' << lx << ' ' << rx << ' ' << mn << ' ' << mx << endl;
			a[l++] = mn, a[r--] = mx;
			lx = mn + 1, rx = mx - 1;
		}
		ll ans = 0;
		for (int i = 1; i < n; i++) ans = max(ans, a[i] - a[i - 1]);

		return ans;
	}

	ll start, end;
	MinMax(0, 1e18, &start, &end);
	ll avg = (end - start) / (n - 1);
	ll last = start, r = min(end - 1, start + avg), ans = avg;
	// cout << '\t' << start << ' ' << end << ' ' << avg << endl;
	while (true) {
		ll mn, mx;
		if (last == end) break;
		MinMax(last + 1, r, &mn, &mx);
		// cout << '\t' << last << ' ' << r << ' ' << mn << ' ' << mx << endl;
		if (mn == -1) {
			r = min(end, r + ans);
			continue;
		}
		ans = max(ans, mn - last);
		last = mx, r = min(end, mx + ans);
	}
	ans = max(ans, end - last);

	return ans;
}

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