Submission #385760

#	Time	Username	Problem	Language	Result	Execution time	Memory
385760		idontreallyknow	Gap (APIO16_gap)	C++17	100 / 100	71 ms	5864 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
using namespace std;
typedef long long ll;
long long findGap(int t, int n)
{
	ll lo = 0, hi = (ll)1e18;
	if (t == 1) {
		ll le = 0, ri = n-1, x, y;
		vector<ll> a(n);
		while (le <= ri) {
			MinMax(lo,hi,&x,&y);
			if (x == -1) break;
			a[le] = x;
			a[ri] = y;
			lo = x+1;
			hi = y-1;
			le++;
			ri--;
		}
		ll ans = 0;
		for (int q = 1; q < n; q++) {
			ans = max(ans, a[q]-a[q-1]);
		}
		return ans;
	} else {
		ll x,y;
		MinMax(lo,hi,&x,&y);
		if (n == 2) return y-x;
		ll piece = (y-x-1)/(n-1);
		ll add = y-x-1-(n-1)*piece;
		vector<pair<ll,ll>> inter;
		ll last = x;
		for (int q = 0; q < n-1; q++) {
			inter.emplace_back(last+1,last+1+piece);
			if (add > 0) inter.back().second++;
			last = inter.back().second;
		}
		ll a,b;
		vector<pair<ll,ll>> res;
		for (int q = 0; q < n-1; q++) {
			MinMax(inter[q].first,inter[q].second,&a,&b);
			res.emplace_back(a,b);
		}
		ll ans = 0;
		last = x;
		for (int q = 0; q < n-1; q++) {
			if (res[q].first == -1) continue;
			ans = max(ans, res[q].first-last);
			ans = max(ans, res[q].second-res[q].first);
			last = res[q].second;
		}
		ans = max(ans, y-last);
		return ans;
	}
	return 0;
}

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