Submission #1061545

#	Time	Username	Problem	Language	Result	Execution time	Memory
1061545		jamjanek	Thousands Islands (IOI22_islands)	C++17	5 / 100	20 ms	6796 KiB

islands

#include "islands.h"

#include <variant>
#include <vector>
#include<bits/stdc++.h>
using namespace std;

int odw[100010];
vector<int>graf[100010];
void dfs(int x){
	for(auto j: graf[x]){
		odw[j]++;
		if(odw[j]==1)
			dfs(j);
	}
}
std::variant<bool, std::vector<int>> find_journey(int n, int m, std::vector<int> U, std::vector<int> V) {
	
	if(n==2){
		vector<int> powrot, tam;
		for(int i=0;i<m;i++){
			if(U[i]==0)
				tam.push_back(i);
			else
				powrot.push_back(i);
		}
		if(tam.size()<2 || powrot.size()<1)return false;
		vector<int>ans = {tam[0], powrot[0], tam[1], tam[0], powrot[0], tam[1]};
		return ans;
	}
	int i;
	for(i=0;i<m;i+=2){
		graf[U[i]].push_back(V[i]);
	}
	odw[0] = 1;
	dfs(0);
	for(i=0;i<n;i++)
		if(odw[i]>1)
			return true;
	return false;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45