Submission #111373

#	Time	Username	Problem	Language	Result	Execution time	Memory
111373		diamond_duke	Gap (APIO16_gap)	C++11	30 / 100	85 ms	1916 KiB

gap

#include <algorithm>
#include <cstdio>
#include "gap.h"
using ll = long long;
ll arr[100005];
inline ll calc(int n)
{
	ll res = 0;
	for (int i = 1; i < n; i++)
		res = std::max(res, arr[i] - arr[i - 1]);
	return res;
}
ll findGap(int sub, int n)
{
	if (sub == 1)
	{
		for (int l = 0, r = n - 1; l <= r; l++, r--)
		{
			ll pre = l ? arr[l - 1] + 1 : 0;
			ll nxt = r + 1 < n ? arr[r + 1] - 1 : (ll)1e18;
			MinMax(pre, nxt, arr + l, arr + r);
		}
		return calc(n);
	}
	ll mn, mx, cnt = 0;
	MinMax(0, 1e18, &mn, &mx);
	ll blk = (mx - mn) / (n - 1);
	arr[cnt++] = mn;
	for (ll i = mn; i + blk <= mx; i += blk + 1)
	{
		ll x, y;
		MinMax(i, i + blk, &x, &y);
		if (~x)
			arr[cnt++] = x;
		if (x != y)
			arr[cnt++] = y;
	}
	arr[cnt++] = mx;
	return std::max(blk, calc(cnt));
}

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