Submission #685100

#	Time	Username	Problem	Language	Result	Execution time	Memory
685100		irmuun	Thousands Islands (IOI22_islands)	C++17	Compilation error	0 ms	0 KiB

islands

#include<bits/stdc++.h>
#include "islands.h"
using namespace std;
#define pb push_back
pair<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V){
	if(N==2){
		vector<int>v0,v1;
		for(int i=0;i<M;i++){
			if(U[i]==0){
				v0.pb(i);
			}
			else{
				v1.pb(i);
			}
		}
		if(v0.size()<2||v1.size()<1){
			return {false,{}};
		}
		return {true,{v0[0],v1[0],v0[1],v0[0],v1[0],v0[1]}};
	}
	return {false,{}};
}

Compilation message (stderr)

islands.cpp:5:25: error: ambiguating new declaration of 'std::pair<bool, std::vector<int> > find_journey(int, int, std::vector<int>, std::vector<int>)'
    5 | pair<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V){
      |                         ^~~~~~~~~~~~
In file included from islands.cpp:2:
islands.h:4:38: note: old declaration 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)'
    4 | std::variant<bool, std::vector<int>> find_journey(
      |                                      ^~~~~~~~~~~~