Submission #797657

#	Time	Username	Problem	Language	Result	Execution time	Memory
797657		Osplei	Thousands Islands (IOI22_islands)	C++17	Compilation error	0 ms	0 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<=400){
			
		vector <nodo> grafo[N+5];
 
		for (int i=0; i<M; i++) {
			grafo[U[i]].pb({V[i], i});
		}
 
		if (cont0>=2 && cont1>=1){
 
			ans.pb(grafo[0][0].id);
			ans.pb(grafo[grafo[0][0].v][0].id);

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

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

			ans.pb(grafo[grafo[0][1].v][0].id);
			ans.pb(grafo[0][1].id);
 
			return ans;
 
		} else return false;

	} else return false;
}

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:38:7: error: 'cont0' was not declared in this scope
   38 |   if (cont0>=2 && cont1>=1){
      |       ^~~~~
islands.cpp:38:19: error: 'cont1' was not declared in this scope
   38 |   if (cont0>=2 && cont1>=1){
      |                   ^~~~~
islands.cpp:28:15: warning: control reaches end of non-void function [-Wreturn-type]
   28 |  vector <int> ans;
      |               ^~~