Submission #928575

#	Time	Username	Problem	Language	Result	Execution time	Memory
928575		denniskim	IOI Fever (JOI21_fever)	C++17	25 / 100	5058 ms	14024 KiB

fever

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef __int128 lll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pld;
#define MAX 9223372036854775807LL
#define MIN -9223372036854775807LL
#define INF 0x3f3f3f3f3f3f3f3f
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cout << fixed; cout.precision(10);
#define sp << " "
#define en << "\n"
#define compress(v) sort(v.begin(), v.end()), v.erase(unique(v.begin(), v.end()), v.end())

struct gujo
{
	ll X, D1, Y, D2, T;
	
	bool operator < (const gujo &xx) const
	{
		return T < xx.T;
	}
};

ll n;
pll a[100010];
vector<gujo> vec;
ll ans;
ll D[100010];

ll solve(ll dir)
{
	ll ret = 1;
	
	for(ll i = 1 ; i <= n ; i++)
		D[i] = -1;
	
	D[1] = dir;
	
	for(auto &i : vec)
	{
		if(D[i.X] != -1 && D[i.Y] != -1)
			continue;
		
		if(D[i.X] != -1)
		{
			if(D[i.X] == i.D1)
				D[i.Y] = i.D2, ret++;
		}
		
		else if(D[i.Y] != -1)
		{
			if(D[i.Y] == i.D2)
				D[i.X] = i.D1, ret++;
		}
	}
	
	return ret;
}

int main(void)
{
	fastio
	
	cin >> n;
	
	for(ll i = 1 ; i <= n ; i++)
		cin >> a[i].fi >> a[i].se;
	
	for(ll i = 1 ; i <= n ; i++)
	{
		for(ll j = i + 1 ; j <= n ; j++)
		{
			if(a[i].fi == a[j].fi)
			{
				if(a[i].se < a[j].se)
					vec.push_back({i, 1, j, 3, (a[j].se - a[i].se)});
				else
					vec.push_back({i, 3, j, 1, (a[i].se - a[j].se)});
			}
			
			else if(a[i].se == a[j].se)
			{
				if(a[i].fi < a[j].fi)
					vec.push_back({i, 0, j, 2, a[j].fi - a[i].fi});
				else
					vec.push_back({i, 2, j, 0, a[j].fi - a[i].fi});
			}
			
			else if(a[i].fi + a[i].se == a[j].fi + a[j].se)
			{
				if(a[i].fi < a[j].fi)
				{
					vec.push_back({i, 1, j, 0, (a[j].fi - a[i].fi) * 2});
					vec.push_back({i, 2, j, 3, (a[j].fi - a[i].fi) * 2});
				}
				
				else
				{
					vec.push_back({i, 0, j, 1, (a[i].fi - a[j].fi) * 2});
					vec.push_back({i, 3, j, 2, (a[i].fi - a[j].fi) * 2});
				}
			}
			
			else if(a[i].fi - a[i].se == a[j].fi - a[j].se)
			{
				if(a[i].fi < a[j].fi)
				{
					vec.push_back({i, 0, j, 3, (a[j].fi - a[i].fi) * 2});
					vec.push_back({i, 1, j, 2, (a[j].fi - a[i].fi) * 2});
				}
				
				else
				{
					vec.push_back({i, 3, j, 0, (a[i].fi - a[j].fi) * 2});
					vec.push_back({i, 2, j, 1, (a[i].fi - a[j].fi) * 2});
				}
			}
		}
	}
	
	sort(vec.begin(), vec.end());
	
	for(ll i = 0 ; i < 4 ; i++)
		ans = max(ans, solve(i));
	
	cout << ans;
	return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 0 / 12
• Subtask 6: 0 / 32
• Subtask 7: 0 / 31