Submission #1078740

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078740		Faisal_Saqib	Comparing Plants (IOI20_plants)	C++17	0 / 100	3 ms	4956 KiB

plants

#include "plants.h"
#include <bits/stdc++.h>
using namespace std;
const int N=200100;
int cp[N],od[N],deg[N];
vector<int> ma[N];
void init(int k, std::vector<int> r) {
	int n=r.size();
	for(int i=0;i<n;i++)
	{
		int j=(i+1)%n;
		if(r[i]==0)
		{
			// j -> i
			deg[i]++;
			ma[j].push_back(i);
		}
		else
		{
			// i -> j
			deg[j]++;
			ma[i].push_back(j);
		}
	}
	int cnt=0;
	for(int i=0;i<n;i++)
	{
		if(deg[i]==0 and cp[i]==0)
		{
			cnt++;
			queue<int> cur;
			cur.push(i);
			int jp=0;
			while(cur.size()>0)
			{
				int f=cur.front();
				cur.pop();
				cp[f]=cnt;
				od[f]=jp;
				jp++;
				for(auto s:ma[f])
				{
					deg[s]--;
					if(deg[s]==0)
						cur.push(s);
				}
			}
		}
	}
	return;
}

int compare_plants(int x, int y) {
	if(cp[x]==cp[y])
		return ((od[x]<od[y])?-1:1);
	else
		return 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