Submission #797671

#	Time	Username	Problem	Language	Result	Execution time	Memory
797671		Joshi503	Thousands Islands (IOI22_islands)	C++17	Compilation error	0 ms	0 KiB

islands

// Source: https://usaco.guide/general/io

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

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V){
	vector<int> ida, regreso;
	for(int i = 0; i < M; i++){
		if(U[i] == 0 && V[i] == 1) ida.push_back(i);
		else regreso.push_back(i);
	}
	vector<int> x;
	if((int)ida.size() >= 2 && (int)(regreso.size())){
		x = {ida[0], regreso[0], ida[1], ida[0], regreso[0], ida[1]};
		return x;
	}
	return 0;
}

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:17:9: error: could not convert '0' from 'int' to 'std::variant<bool, std::vector<int, std::allocator<int> > >'
   17 |  return 0;
      |         ^
      |         |
      |         int