Submission #797632

#	Time	Username	Problem	Language	Result	Execution time	Memory
797632		Osplei	Thousands Islands (IOI22_islands)	C++17	0 / 100	26 ms	3132 KiB

islands

#include <bits/stdc++.h>
 
using namespace std;
 
typedef pair<int,int> ii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii; 
typedef vector<vii> wgraf;
typedef pair<int,ii> edge;
typedef vector <ll> vl;
typedef pair <ll, ll> LL;
typedef vector <LL> vll;
 
#define UNVISITED 0
#define VISITED 1
#define pb push_back
#define F first
#define S second

struct nodo{
	int v, id;
};

variant <bool, vector <int>> find_journey(int N, int M, vector <int> U, vector <int> V){
	
	vector <int> ans;
	
	if (N==2){

		int cont0=0, cont1=0;
			
		vector <nodo> grafo[N+5];

		for (int i=0; i<M; i++) {
			grafo[U[i]].pb({V[i], i});
			
			if (U[i]==0) cont0++;
			else cont1++;
		}

		if (cont0>=2 && cont1>=1){

			ans.pb(grafo[0][0].id);
			ans.pb(grafo[1][0].id);
			ans.pb(grafo[0][1].id);
			ans.pb(grafo[0][0].id);
			ans.pb(grafo[1][0].id);
			ans.pb(grafo[0][1].id);

		} else return ans;

	} else return ans;
}

Compilation message (stderr)

islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)':
islands.cpp:28:15: warning: control reaches end of non-void function [-Wreturn-type]
   28 |  vector <int> ans;
      |               ^~~

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