Submission #971021

#	Time	Username	Problem	Language	Result	Execution time	Memory
971021		ALeonidou	Thousands Islands (IOI22_islands)	C++17	0 / 100	1 ms	348 KiB

islands

#include "islands.h"

#include <variant>
#include <vector>
#include <iostream>
using namespace std;

#define ll int
#define F first
#define S second
#define pb push_back
#define sz(x) (ll)x.size()
#define endl "\n"

typedef vector <ll> vi;
typedef pair <ll, ll> ii;
typedef vector <ii> vii;
	
#define dbg(x) cout<<#x<<": "<<x<<endl;
#define dbg2(x,y) cout<<#x<<": "<<x<<" "<<#y<<": "<<y<<endl;
#define dbg3(x,y,z) cout<<#x<<": "<<x<<" "<<#y<<": "<<y<<" "<<#z<<": "<<z<<endl;
	
void printVct(vi &v){
	for (ll i =0; i<sz(v); i++){
			cout<<v[i]<<" ";
	}
	cout<<endl;
}

ll n,m;
vi u,v;

variant<bool, vi> find_journey(int N, int M, vi U, vi V){
	ll n = N, m = M;
	u = U, v = V;
	// printVct(u);
	// printVct(v);
	if (n == 2){
		ll f0 = 0;
		vi a(3,-1);
		for (ll i =0; i<n; i++){
			if (u[i]){
				f0++;
				if (a[0] == -1){
					a[0] = i;
				}
				else if (a[1] == -1){
					a[1] = i;
				}
			}
			else if (a[2] == -1){
				a[2] = i;
			}
		}
		ll f1 = m-f0;

		if (f0 >= 2 && f1 >= 1){
			return vi({a[0], a[2], a[1], a[0], a[2], a[1]});
		}
		else{
			return false;
		}
	}
	return false;
}

/*
4 5
0 1
1 2
2 3
0 3
3 1

2 3
0 1
1 0
1 0
*/

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