제출 #80003

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
80003		antimirage	열대 식물원 (Tropical Garden) (IOI11_garden)	C++17	0 / 100	3 ms	1528 KiB

garden

#include "gardenlib.h"
#include "garden.h"
#include <bits/stdc++.h>
//#include "grader.cpp"

#define fr first
#define sc second
#define mk make_pair
#define pb emplace_back
#define all(s) s.begin(), s.end()

using namespace std;

const int M = 150005;

int n, m, p, q, k[M], edges[M][2], used[M][2], mn[M][2], last, go[2], lst, dp[M][2][2];

void dfs (int v, int type)
{
	used[v][type] = 1;
	
	int to_type;
	
	if (type == 0 || mn[v][1] == -1)
	{
		to_type = (mn[ mn[v][0] ][0] == v ? 1 : 0);
		
		if (mn[v][0] == p)
		{
			if ( to_type == 1 )
				dp[v][type][1] = 1,
				dp[v][type][0] = dp[p][1][0] + 1;
			else
				dp[v][type][0] = 1,
				dp[v][type][1] = dp[p][0][1] + 1;
			
			return;
		}
		if ( to_type == 1 && used[ mn[v][0] ][1] == 0 )
			dfs( mn[v][0], 1);
			
		else if ( used[ mn[v][0] ][0] == 0 )
			dfs( mn[v][0], 0);
			
		dp[v][type][0] = dp[ mn[v][0] ][to_type][0] + 1,
		dp[v][type][1] = dp[ mn[v][0] ][to_type][1] + 1;
	}
	else
	{
		to_type = (mn[ mn[v][1] ][0] == v ? 1 : 0);
		
		if (mn[v][1] == p)
		{
			if ( to_type == 1 )
				dp[v][type][1] = 1,
				dp[v][type][0] = dp[p][1][0] + 1;
			else
				dp[v][type][0] = 1,
				dp[v][type][1] = dp[p][0][1] + 1;
				
			return;
		}
		
		if ( to_type == 1 && used[ mn[v][1] ][1] == 0 )
			dfs( mn[v][1], 1);
		
		else if ( used[ mn[v][1] ][0] == 0 ) 
			dfs( mn[v][1], 0);
		
		dp[v][type][0] = dp[ mn[v][1] ][to_type][0] + 1,
		dp[v][type][1] = dp[ mn[v][1] ][to_type][1] + 1;
	}
}
void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
	memset(mn, -1, sizeof(mn) );
	n = N, m = M, p = P;
	
	for (int i = 0; i < n; i++) 
		for (int j = 0; j < 2; j++)
			for (int k = 0; k < 2; k++)
				dp[i][j][k] = 1e9 + 1e8;
	
	for (int i = 0; i < m; i++)
	{
		edges[i][0] = R[i][0], edges[i][1] = R[i][1]; 
		
		if ( mn[ edges[i][0] ][0] == -1 ) mn[ edges[i][0] ][0] = edges[i][1];
		else if ( mn[ edges[i][0] ][1] == -1 ) mn[ edges[i][0] ][1] = edges[i][1];
		
		if ( mn[ edges[i][1] ][0] == -1 ) mn[ edges[i][1] ][0] = edges[i][0];
		else if ( mn[ edges[i][1] ][1] == -1 ) mn[ edges[i][1] ][1] = edges[i][0];
	}
	q = Q;
	for (int i = 0; i < q; i++)
		k[i] = G[i];
	
	dfs(p, 0);
	dfs(p, 1);

	for (int i = 0; i < n; i++)
		if (!used[i][0]) dfs(i, 0);
		
	assert( dp[p][0][0] > 1e7 || dp[p][0][1] > 1e7 ) ;
	assert( dp[p][1][0] > 1e7 || dp[p][1][1] > 1e7 ) ;
	
	if ( dp[p][0][0] > 1e7 ) go[0] = 0;
	else if ( dp[p][0][1] > 1e7 ) go[0] = 1;
	else go[0] = -1;
	
	if ( dp[p][1][0] > 1e7 ) go[1] = 0;
	else if ( dp[p][1][1] > 1e7 ) go[1] = 1;
	else go[1] = -1;
	
	for (int i = 0; i < q; i++)
	{
		int ans = 0, sup;
		
		for (int j = 0; j < n; j++)
		{
			if ( min( dp[j][0][0], dp[j][0][1] ) > k[i] ) continue;
			
			if ( dp[j][0][0] < dp[j][0][1] )
			{
				sup = k[i] - dp[j][0][0];
				
				if (sup == 0) {
					ans++;
					continue;
				}
				if (go[0] == 0 && sup % dp[p][0][0] == 0)
					ans++;
				else if (go[0] == 1 && (sup % (dp[p][0][1] + dp[p][1][0]) == 0 
				|| sup % (dp[p][0][1] + dp[p][1][0]) == dp[p][0][1] || sup % (dp[p][0][1] + dp[p][1][0]) == dp[p][1][0]) )
					ans++;
			}
			else
			{
				sup = k[i] - dp[j][0][1];
				
				if (sup == 0){
					ans++;
					continue;
				}	
				if (go[1] == 1 && sup % dp[p][1][1] == 0)
					ans++;
				else if (go[1] == 0 && (sup % (dp[p][1][0] + dp[p][0][1]) == 0 
				|| sup % (dp[p][1][0] + dp[p][0][1]) == dp[p][1][0] || sup % (dp[p][1][0] + dp[p][0][1]) == dp[p][0][1]) )
					ans++;
			}
		}
		answer(ans);
	}
}

• Subtask 1: 0 / 49
• Subtask 2: 0 / 20
• Subtask 3: 0 / 31