Submission #753871

#	Time	Username	Problem	Language	Result	Execution time	Memory
753871		jakobrs	Stranded Far From Home (BOI22_island)	C++17	10 / 100	191 ms	30168 KiB

island

#include <iostream>
#include <vector>
#include <queue>
#include <tuple>
#include <utility>

using i64 = int64_t;

int main() {
    std::cin.tie(nullptr)->sync_with_stdio(false);

    i64 n, m;
    std::cin >> n >> m;

    std::vector<i64> a(n);
    for (i64 i = 0; i < n; i++)
        std::cin >> a[i];

    std::vector<std::vector<i64>> adj(n);
    std::vector<std::vector<i64>> children(n);
    for (i64 i = 0; i < m; i++) {
        i64 u, v;
        std::cin >> u >> v;
        u--, v--;

        adj[u].push_back(v);
        adj[v].push_back(u);

        children[std::min(u, v)].push_back(std::max(u, v));
    }

    std::string result(n, '0');

    std::vector<i64> sizes(n);
    for (i64 i = n - 1; i >= 0; i--) {
        sizes[i] = a[i];

        for (i64 j : children[i]) {
            sizes[i] += sizes[j];
        }
    }

    result[0] = '1';

    for (i64 i = 0; i < n; i++) {
        if (result[i] == '1') {
            for (i64 j : children[i]) {
                if (sizes[j] >= a[i]) {
                    result[j] = '1';
                }
            }
        }
    }

    std::cout << result;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35