Submission #1037620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037620		thinknoexit	Thousands Islands (IOI22_islands)	C++17	10 / 100	19 ms	7004 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
    if (N == 2) {
        vector<vector<int>> boat(2);
        for (int i = 0;i < M;i++) boat[U[i]].push_back(i);
        if ((int)boat[0].size() < 2 || (int)boat[1].size() < 1) return false;
        vector<int> ans = { boat[0][0], boat[1][0], boat[0][1], boat[0][0], boat[1][0], boat[0][1] };
        return ans;
    }
    int n = N;
    vector<vector<int>> boat(n, vector<int>(n, 0));
    for (int i = 0;i < M;i++) {
        boat[U[i]][V[i]] = i;
    }
    vector<int> ans = { boat[0][1], boat[1][0],
                        boat[0][2], boat[2][1], boat[0][1], boat[1][0],
                        boat[2][1], boat[0][2] };
    return ans;
}

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