Submission #956512

#	Time	Username	Problem	Language	Result	Execution time	Memory
956512		thinknoexit	Gap (APIO16_gap)	C++17	72.60 / 100	40 ms	2140 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll inf = 1e18;
ll a[100100];
int n;
ll ans = 1;
ll findGap(int T, int N) {
	n = N;
	if (T == 1 || N <= 20) {
		a[0] = -1, a[n + 1] = inf + 1;
		for (int i = 1;i <= n / 2;i++) {
			MinMax(a[i - 1] + 1, a[n - i + 2] - 1, &a[i], &a[n - i + 1]);
		}
		if (n & 1) {
			ll _;
			MinMax(a[n / 2] + 1, a[n / 2 + 2] - 1, &a[n / 2 + 1], &_);
		}
		for (int i = 1;i < n;i++) {
			ans = max(ans, a[i + 1] - a[i]);
		}
		return ans;
	}
	ll mn, mx;
	MinMax(0, inf, &mn, &mx);
	ll now = mn;
	while (now < mx) {
		ll n1, n2;
		ll t = ans;
		for (;;t *= 2) {
			MinMax(now + 1, now + t, &n1, &n2);
			if (n1 != -1) break;
		}
		ans = max(ans, n1 - now);
		now = n2;
	}
	return ans;
}

• Subtask 1: 30 / 30
• Subtask 2: 42.603986447 / 70