제출 #956103

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
956103		thinknoexit	Gap (APIO16_gap)	C++17	47.68 / 100	51 ms	2188 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 mx = 0;
void play(ll l, ll r) {
	if (r - l <= mx) return;
	ll mid = (l + r) / 2;
	ll ql, qr, _l, _r;
	MinMax(l, mid, &_l, &ql);
	MinMax(mid + 1, r, &qr, &_r);
	if (ql == -1 && qr == -1) return;
	if (ql == -1) return play(qr, r);
	if (qr == -1) return play(l, ql);
	if (ql != -1 && qr != -1) {
		mx = max(mx, qr - ql);
		if (ql - _l > qr - _r) play(_l, ql), play(qr, _r);
		else play(qr, _r), play(_l, ql);

	}
}
ll findGap(int T, int N) {
	n = N;
	if (T == 1) {
		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++) {
			mx = max(mx, a[i + 1] - a[i]);
		}
		return mx;
	}
	play(0, 1e18);
	return mx;
}

• Subtask 1: 30 / 30
• Subtask 2: 17.6761911006 / 70