Submission #1024584

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024584		overwatch9	Stranded Far From Home (BOI22_island)	C++17	0 / 100	161 ms	604 KiB

island

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int maxn = 2001;
ll S[maxn];
vector <int> adj[maxn];
bool vis[maxn];
int x = 0;
ll sz = 0;
void dfs(int s) {
    if (vis[s])
        return;
    vis[s] = true;
    x++;
    set <int> to_vis;
    for (auto i : adj[s]) {
        if (!vis[i])
            to_vis.insert(i);
    }
    while (!to_vis.empty()) {
        set <int> to_rem;
        for (auto i : to_vis) {
            if (vis[i]) {
                to_rem.insert(i);
                continue;
            }
            if (S[i] <= sz) {
                sz += S[i];
                dfs(i);
                to_rem.insert(i);
            }
        }
        if (to_rem.empty())
            break;
        for (auto i : to_rem)
            to_vis.erase(i);
    }
}
int main() {
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        cin >> S[i];
    for (int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    for (int i = 1; i <= n; i++) {
        sz = S[i];
        dfs(i);
        if (x == n)
            cout << 1;
        else
            cout << 0;
        fill(vis, vis + n + 1, false);
        sz = x = 0;
    }
}

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