Submission #563951

#	Time	Username	Problem	Language	Result	Execution time	Memory
563951		blue	City (JOI17_city)	C++17	46 / 100	434 ms	54200 KiB

Encoder

#include "Encoder.h"
#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cassert>
using namespace std;

	namespace{
using vi = vector<int>;
using vvi = vector<vi>;
#define sz(x) int(x.size())


const int mx = 350'000;
using ll = long long;
using vll = vector<ll>;

int N;
vi edge[mx];

vll code(mx, 0);

vll dfsind(mx, 0);
vll subtree(mx, 1);
vll fakesubtree(mx, 1);

int ct = -1;







vll getsizes()
{
	double base = 1.0001;
	set<ll> res;

	double curr = 1;
	while(res.empty() || *res.rbegin() < mx)
	{
		curr *= base;
		res.insert(curr);
	}

	vll resvec;
	for(ll k : res)
		resvec.push_back(k);

	return resvec;
}


vll sizes;



void dfs(int u, int p)
{
	// cerr << "dfs " << u << '\n';
	dfsind[u] = ++ct;
	for(int v : edge[u])
	{
		if(v == p) continue;
		dfs(v, u);
		subtree[u] += subtree[v];
	}
	auto z = lower_bound(sizes.begin(), sizes.end(), (ll) subtree[u]);
	assert(z != sizes.end() && *z >= subtree[u]);
	subtree[u] = *z;
	fakesubtree[u] = z - sizes.begin();
}







	}


void Encode(int N_, int A[], int B[])
{
	N = N_;
	sizes = getsizes();

	cerr << sz(sizes) << '\n';

	// for(int z : sizes)
	// 	cerr << z << ' ';
	// cerr << '\n';



	for(int e = 0; e < N-1; e++)
	{
		edge[A[e]].push_back(B[e]);
		edge[B[e]].push_back(A[e]);
	}

	// cerr << "done\n";

	dfs(0, -1);


	// cerr << "done2\n";

	for(int i = 0; i < N; i++)
	{
		// cerr << i << " : " << dfsind[i] << ' ' << subtree[i] << ' ' << ((dfsind[i]<<18) | subtree[i]) << '\n';
		Code(i, (fakesubtree[i] << 18) | dfsind[i]);
	}
}

Device

#include "Device.h"
#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
using namespace std;

namespace
{
	using vi = vector<int>;
	using vvi = vector<vi>;
	using ll = long long;
	using vll = vector<ll>;
	#define sz(x) int(x.size())

	const int mx = 350'000;

	vll getsizes()
	{
		double base = 1.0001;
		set<ll> res;

		double curr = 1;
		while(res.empty() || *res.rbegin() < mx)
		{
			curr *= base;
			res.insert(curr);
		}

		vll resvec;
		for(ll k : res)
			resvec.push_back(k);

		return resvec;
	}


	vll sizes;

}

void InitDevice()
{
	sizes = getsizes();
}

int Answer(long long S, long long T)
{
	ll s_st = sizes[S>>18];
	ll s_ind = S & ((1<<18) - 1);

	ll t_st = sizes[T>>18];
	ll t_ind = T & ((1<<18) - 1);

	// cerr << S << ' ' << T << " : " << s_ind << ' ' << s_st << " | " << t_ind << ' ' << t_st << "\n";

	if(t_ind <= s_ind && s_ind + s_st <= t_ind + t_st)
		return 0;
	else if(s_ind <= t_ind && t_ind + t_st <= s_ind + s_st)
		return 1;
	else
		return 2;
}

• Subtask 1: 8 / 8
• Subtask 2: 38 / 92