Submission #574130

#	Time	Username	Problem	Language	Result	Execution time	Memory
574130		eecs	Stranded Far From Home (BOI22_island)	C++17	10 / 100	1086 ms	14144 KiB

island

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

const int maxn = 200010;
int n, m, a[maxn], vis[maxn];
vector<int> G[maxn];

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    while (m--) {
        int u, v;
        cin >> u >> v;
        G[u].push_back(v), G[v].push_back(u);
    }
    for (int i = 1; i <= n; i++) {
        set<pair<int, int>> cand;
        long long s = 0;
        cand.emplace(0, i);
        while (!cand.empty() && cand.begin()->first <= s) {
            int j = cand.begin()->second;
            s += a[j], vis[j] = i;
            cand.erase(cand.begin());
            for (int k : G[j]) {
                if (i ^ vis[k]) cand.emplace(a[k], k);
            }
        }
        cout << (cand.empty() ? '1' : '0');
    }
    return 0;
}

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