Submission #633102

#	Time	Username	Problem	Language	Result	Execution time	Memory
633102		tutis	Thousands Islands (IOI22_islands)	C++17	10 / 100	32 ms	4428 KiB

islands

#include "islands.h"

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

variant<bool, vector<int>> find_journey(
int N, int M, vector<int> U, vector<int> V) {
    if (N == 2)
    {
        vector<int>a;
        vector<int>b;
        for (int i = 0; i < M; i++)
            if (U[i] == 0 && V[i] == 1)
                a.push_back(i);
            else
                b.push_back(i);
        if (a.size() >= 2 && b.size() >= 1)
            return vector<int>({a[0], b[0], a[1], a[0], b[0], a[1]});
        return false;
    }
    {
        int x = -1;
        int y = -1;
        int z = -1;
        int t = -1;
        for (int i = 0; i < M; i++)
            if (U[i] == 0 && V[i] == 1)
                x = i;
            else if (U[i] == 1 && V[i] == 0)
                y = i;
            else if (U[i] == 0 && V[i] == 2)
                z = i;
            else if (U[i] == 2 && V[i] == 0)
                t = i;
        if (min({x, y, z, t}) >= 0)
            return vector<int>({x, y, z, t, y, x, t, z});
    }
    return false;
}

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