Submission #1222022

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222022		totoro	Thousands Islands (IOI22_islands)	C++20	5 / 100	54 ms	10312 KiB

islands

#include "islands.h"

#include <map>
#include <variant>
#include <vector>

std::variant<bool, std::vector<int>> find_journey(int N, int M, std::vector<int> U, std::vector<int> V) {
    std::vector<std::map<int, int>> canoesfrom(N);
    for (int i = 0; i < M; ++i) {
        canoesfrom[U[i]][V[i]] = i;
    }

    if (N <= 2) return false;

    int a, b, x, y;
    a = canoesfrom[0][1];
    b = canoesfrom[1][0];
    x = canoesfrom[0][2];
    y = canoesfrom[2][0];
    return std::vector<int>{a, b, x, y, b, a, y, x};
}

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