Submission #302443

#	Time	Username	Problem	Language	Result	Execution time	Memory
302443		arnold518	Comparing Plants (IOI20_plants)	C++14	0 / 100	64 ms	5624 KiB

plants

#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 5000;

int N, K, R[MAXN+10];
int adj[MAXN+10][MAXN+10];

bool vis[MAXN+10];
void dfs(int now, int root)
{
	vis[now]=true;
	for(int i=0; i<N; i++)
	{
		if(adj[now][i]==0) continue;
		if(vis[i]) continue;
		adj[root][i]=1;
		dfs(i, root);
	}
}

void init(int _K, vector<int> _R)
{
	K=_K; N=_R.size();
	for(int i=0; i<N; i++) R[i]=_R[i];

	for(int i=0; i<N; i++)
	{
		if(R[i]==0)
		{
			for(int j=1; j<K; j++)
			{
				adj[(i+j)%N][i]=1;
			}
		}
		if(R[i]==K-1)
		{
			for(int j=1; j<K; j++)
			{
				adj[i][(i+j)%N]=1;
			}	
		}
	}
	for(int i=0; i<N; i++)
	{
		if(R[i]<R[(i+1)%N])
		{
			adj[(i+1)%N][i]=1;
		}
		if(R[i]>R[(i+1)%N])
		{
			adj[i][(i+1)%N]=1;
		}
	}
	for(int i=0; i<N; i++)
	{
		memset(vis, 0, sizeof(vis));
		dfs(i, i);
	}

	return;
}

int compare_plants(int x, int y)
{
	int ans=0;

	if(adj[x][y]==1) return -1;
	if(adj[y][x]==1) return 1;
	return 0;
}

Compilation message (stderr)

plants.cpp: In function 'int compare_plants(int, int)':
plants.cpp:71:6: warning: unused variable 'ans' [-Wunused-variable]
   71 |  int ans=0;
      |      ^~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25