oj.uz

Submission #242667

# Submission time Handle Problem Language Result Execution time Memory
242667 2020-06-28T21:14:08 Z johutha Tropical Garden (IOI11_garden) C++17
69 / 100
 5000 ms 54820 KB 
#pragma GCC optimize("Ofast")

#include "garden.h"
#include "gardenlib.h"
#include <vector>
#include <iostream>
 
using namespace std;
 
struct graph
{
	int n;
	int h;
	vector<vector<int>> adjlist;
	vector<vector<int>> best;
	vector<int> dist;
	vector<bool> cycle;
	int cyc = 2e9;
	int p;
 
	void add(int fr, int to)
	{
		int t = to;
		if (fr == best[to][0]) t += h;
		if (best[fr][0] == to)
		{
			adjlist[fr].push_back(t);
		}
		if (best[fr][1] == to)
		{
			adjlist[fr + h].push_back(t);
		}
	}
 
	graph(int in, int m, vector<vector<int>> ib, int R[][2]) : n(2*in), h(in), adjlist(vector<vector<int>>(2*n)), best(ib), dist(n, -1), cycle(n)
	{
		for (int i = 0; i < m; i++)
		{
			add(R[i][0], R[i][1]);
			add(R[i][1], R[i][0]);
		}
	}
 
	void print()
	{
		cout << n << "\n";
 
		for (int i = 0; i < n; i++)
		{
			for (auto j : adjlist[i])
			{
				cout << i << " " << j << "\n";
			}
		}
	}
 
	void reverse()
	{
		vector<vector<int>> old(n);
		swap(old, adjlist);
 
		for (int i = 0; i < n; i++)
		{
			for (int j : old[i])
			{
				adjlist[j].push_back(i);
			}
		}
	}
 
	bool dfs(int curr, int d)
	{
		if (curr == p && dist[curr] != -1)
		{
			cyc = d;
			return true;
		}
		dist[curr] = d;
 
		for (auto next : adjlist[curr])
		{
			if (dfs(next, d + 1)) cycle[curr] = true;
		}
 
		return cycle[curr];
	}
	
	void calc(int P)
	{
		p = P;
		dfs(p, 0);
	}
 
	void pcyc()
	{
		cout << "Cycle: " << cyc << "\n";
		for (int i = 0; i < n; i++)
		{
			cout << (i % h);
			if (i >= h) cout << "*";
			else cout << " ";
			cout << ": ";
			cout << cycle[i] << "   " << dist[i] << "\n";
		}
	}
 
	bool check(int v, int t)
	{
		if (t < dist[v]) return false;
		if (t % cyc != dist[v] % cyc) return false;
		return true;
	}
};
 
void count_routes(int n, int m, int P, int R[][2], int Q, int G[])
{
	vector<vector<int>> best(n, vector<int>(2, -1));
 
	auto ins = [&](int k, int v)
	{
		swap(best[k][0], best[k][1]);
		best[k][0] = v;
	};
 
	for (int i = m - 1; i >= 0; i--)
	{
		ins(R[i][0], R[i][1]);
		ins(R[i][1], R[i][0]);
	}
 
	for (int i = 0; i < n; i++) if (best[i][1] == -1) best[i][1] = best[i][0];
 
	graph g(n, m, best, R);
	g.reverse();
	graph g2(g);
	g.calc(P);
	g2.calc(P + n);
	
	for (int c = 0; c < Q; c++)
	{
		int v = G[c];
		int r = 0;
 
		for (int i = 0; i < n; i++)
		{
			r += g.check(i, v);
			r += g2.check(i, v);
		}
		answer(r);
	}
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 6 ms 768 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 6 ms 640 KB Output is correct
9 Correct 7 ms 768 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 6 ms 768 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 6 ms 640 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 33 ms 8688 KB Output is correct
12 Correct 64 ms 14224 KB Output is correct
13 Correct 112 ms 43124 KB Output is correct
14 Correct 212 ms 49404 KB Output is correct
15 Correct 238 ms 50036 KB Output is correct
16 Correct 171 ms 34324 KB Output is correct
17 Correct 147 ms 28916 KB Output is correct
18 Correct 54 ms 14216 KB Output is correct
19 Correct 203 ms 49420 KB Output is correct
20 Correct 242 ms 50012 KB Output is correct
21 Correct 168 ms 34196 KB Output is correct
22 Correct 164 ms 28916 KB Output is correct
23 Correct 225 ms 54820 KB Output is correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 768 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 6 ms 768 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 6 ms 640 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 33 ms 8688 KB Output is correct
12 Correct 64 ms 14224 KB Output is correct
13 Correct 112 ms 43124 KB Output is correct
14 Correct 212 ms 49404 KB Output is correct
15 Correct 238 ms 50036 KB Output is correct
16 Correct 171 ms 34324 KB Output is correct
17 Correct 147 ms 28916 KB Output is correct
18 Correct 54 ms 14216 KB Output is correct
19 Correct 203 ms 49420 KB Output is correct
20 Correct 242 ms 50012 KB Output is correct
21 Correct 168 ms 34196 KB Output is correct
22 Correct 164 ms 28916 KB Output is correct
23 Correct 225 ms 54820 KB Output is correct
24 Correct 10 ms 384 KB Output is correct
25 Correct 1103 ms 8824 KB Output is correct
26 Correct 1988 ms 14216 KB Output is correct
27 Correct 4357 ms 43108 KB Output is correct
28 Execution timed out 5050 ms 49428 KB Time limit exceeded
29 Halted 0 ms 0 KB -