Submission #974373

#	Time	Username	Problem	Language	Result	Execution time	Memory
974373		Kenjikrab	Gap (APIO16_gap)	C++14	19.19 / 100	43 ms	3256 KiB

gap

#include "gap.h"
#include<bits/stdc++.h>
#define ll long long
#define fi first
#define se second
using namespace std;
long long findGap(int T, int N)
{
	int cnt=N;
	ll A=1e18;
	ll ans=0;
	ll mn,mx;
	MinMax((ll)0,A,&mn,&mx);
	if(N==2)return mx-mn;
	if(N==3||N==4)
	{
		ll mn1,mx1;
		MinMax(mn+1,mx-1,&mn1,&mx1);
		return max(max(mn1-mn,mx-mx1),mx1-mn1);
	}
	queue<pair<ll,ll>> q;
	q.push({mn,mx});
	while(cnt>0&&!q.empty())
	{
		ll l=q.front().fi,r=q.front().se;
		q.pop();
		if(l+1==r||l==r)
		{
			ans=max(ans,r-l);
			continue;
		}
		ll mid=(l+r)>>1;
		ll mn1,mx1;
		MinMax(l,mid,&mn1,&mx1);
		ll mn2,mx2;
		MinMax(mid+1,r,&mn2,&mx2);
		if(mn1==-1&&mx1==-1&&mn2==-1&&mx2==-1)ans=max(ans,r-l);
		if(mn1!=-1)
		{
			cnt--;
			if(mn1!=mx2)cnt--;
		}
		if(mn2!=-1)
		{
			cnt--;
			if(mn2!=mx2)cnt--;
		}
		if(mx1!=-1&&mn2!=-1)ans=max(ans,mn2-mx1);

		if(mn1!=-1)ans=max(ans,mn1-l);
		else if(mn2!=-1)ans=max(ans,mn2-l);

		if(mx2!=-1)ans=max(ans,r-mx2);
		else if(mx1!=-1)ans=max(ans,r-mx1);

		if(mn1!=mx1&&mx1-mn1>ans)q.push({mn1,mx1});
		if(mn2!=mx2&&mx2-mn2>ans)q.push({mn2,mx2});
	}
	return (ll)ans;
}

• Subtask 1: 0 / 30
• Subtask 2: 19.1923000562 / 70