Submission #549829

#	Time	Username	Problem	Language	Result	Execution time	Memory
549829		ToroTN	Gap (APIO16_gap)	C++14	87.64 / 100	68 ms	3156 KiB

gap

#include<bits/stdc++.h>
using namespace std;
#include "gap.h"
long long t,n,st,ed,mn,mx,ans=-1e18,gap,num;
vector<long long> l,r;
vector<pair<long long,long long> > p;
long long findGap(int T, int N)
{
	t=(long long)T;
	n=(long long)N;
	if(t==1)
	{
		st=0;
		ed=1e18;
		for(int i=1;i<=(n-1)/2+1;i++)
		{
			MinMax(st,ed,&mn,&mx);
			l.push_back(mn);
			r.push_back(mx);
			st=mn+1;
			ed=mx-1;
		}
		for(int i=1;i<l.size();i++)
		{
			ans=max(ans,l[i]-l[i-1]);
		}
		ans=max(ans,r[r.size()-1]-l[l.size()-1]);
		for(int i=r.size()-2;i>=0;i--)
		{
			ans=max(ans,r[i]-r[i+1]);
		}
		return ans;
	}else
	{
		MinMax(1,1e18,&st,&ed);
		//printf("%lld %lld\n",st,ed);
		p.push_back({st,st});
		gap=(ed-st)/(n-1);
		ans=gap;
		num=st+1;
		while(1)
		{
			MinMax(num,num+gap,&mn,&mx);
			//ans=max(ans,mn-num);
			if(mn!=-1&&mx!=-1)
			p.push_back({mn,mx});
			num+=gap;
			if(num>=ed)
			{
				break;
			}
		}
		for(int i=0;i<p.size();i++)
		{
			//printf("%lld %lld\n",p[i].first,p[i].second);
			if(i!=0)ans=max(ans,p[i].first-p[i-1].second);
			ans=max(ans,p[i].second-p[i].first);
		}
		return ans;
	}
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:23:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   for(int i=1;i<l.size();i++)
      |               ~^~~~~~~~~
gap.cpp:53:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   for(int i=0;i<p.size();i++)
      |               ~^~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 57.6396140649 / 70