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Submission #697798

# Submission time Handle Problem Language Result Execution time Memory
697798 2023-02-11T06:07:20 Z Duy_e Stranded Far From Home (BOI22_island) C++14
20 / 100
 1000 ms 30556 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair <ll, ll>
#define st first
#define nd second
#define rep(i, n, m) for (ll i = (n); i <= (m); i ++)
#define rrep(i, n, m) for (ll i = (n); i >= (m); i --)
using namespace std;

const long long INF = 1e18;
const long long N = 2e5 + 7;

int n, m;
ll mx;
ll s[N];
vector <int> d[N];

namespace sub14 {
    vector <int> save;
    bool vis[N];

    bool check(int st) {
        priority_queue <pii, vector <pii>, greater <pii>> q;
        for (int i: save) vis[i] = false;
        save.clear();
        for (int u: d[st]) {
            vis[u] = true;
            save.push_back(u);
            q.push({s[u], u});
        }

        ll cur = s[st];
        vis[st] = true;
        save.push_back(st);
        ll tar = mx;
        while (q.size()) {
            int u = q.top().nd, w = q.top().st; q.pop();
            if (cur < w) return false;
            cur += w;
            if (cur >= tar) return true;

            for (int v: d[u]) if (!vis[v]) {
                vis[v] = true;
                save.push_back(v);
                q.push({s[v], v});
            }
        }

        return true;
    }
}

namespace sub2 {

    bool ck[N];
    ll f[N];

    void dfs(int p, int u) {
        f[u] = s[u];
        for (int v: d[u]) if (v != p) {
            dfs(u, v);
            f[u] += f[v];
        }

        ck[u] = f[u] >= s[p];
    }

    void dfs2(int p, int u) {
        for (int v: d[u]) if (v != p) {
            ck[v] &= ck[u];
            dfs2(u, v);
        }
    }

    void solve() {
        ck[1] = true;
        dfs(1, 1);
        dfs2(1, 1);
        rep(i, 1, n) cout << ck[i];
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> m;

    rep(i, 1, n) {
        cin >> s[i];
        mx = max(mx, s[i]);
    }

    rep(i, 1, m) {
        int u, v;
        cin >> u >> v;
        d[u].push_back(v);
        d[v].push_back(u);
    }

    bool is_sub2 = true;
    if (m != n - 1) is_sub2 = false;
    rep(i, 2, n) if (s[i] > s[i - 1]) is_sub2 = false;

    if (is_sub2) {
        sub2::solve();
        return 0;
    }

    rep(i, 1, n)
        cout << sub14 :: check(i);

    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 4 ms 5076 KB Output is correct
9 Correct 226 ms 5140 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 4 ms 5112 KB Output is correct
12 Correct 4 ms 5076 KB Output is correct
13 Correct 130 ms 5076 KB Output is correct
14 Correct 101 ms 5124 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 142 ms 20956 KB Output is correct
4 Correct 136 ms 21036 KB Output is correct
5 Correct 150 ms 14532 KB Output is correct
6 Correct 160 ms 14772 KB Output is correct
7 Correct 155 ms 14840 KB Output is correct
8 Correct 185 ms 14852 KB Output is correct
9 Correct 137 ms 14740 KB Output is correct
10 Correct 86 ms 15476 KB Output is correct
11 Correct 86 ms 15516 KB Output is correct
12 Correct 165 ms 14836 KB Output is correct
13 Correct 135 ms 30444 KB Output is correct
14 Correct 131 ms 30332 KB Output is correct
15 Correct 146 ms 30556 KB Output is correct
16 Correct 83 ms 30116 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5032 KB Output is correct
2 Correct 135 ms 13160 KB Output is correct
3 Correct 149 ms 13152 KB Output is correct
4 Correct 136 ms 30332 KB Output is correct
5 Execution timed out 1085 ms 14328 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 179 ms 13204 KB Output is correct
3 Correct 169 ms 13196 KB Output is correct
4 Correct 152 ms 13300 KB Output is correct
5 Correct 140 ms 13260 KB Output is correct
6 Correct 131 ms 12900 KB Output is correct
7 Correct 112 ms 19572 KB Output is correct
8 Execution timed out 1094 ms 17684 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 5076 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 4 ms 5076 KB Output is correct
9 Correct 226 ms 5140 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 4 ms 5112 KB Output is correct
12 Correct 4 ms 5076 KB Output is correct
13 Correct 130 ms 5076 KB Output is correct
14 Correct 101 ms 5124 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 142 ms 20956 KB Output is correct
18 Correct 136 ms 21036 KB Output is correct
19 Correct 150 ms 14532 KB Output is correct
20 Correct 160 ms 14772 KB Output is correct
21 Correct 155 ms 14840 KB Output is correct
22 Correct 185 ms 14852 KB Output is correct
23 Correct 137 ms 14740 KB Output is correct
24 Correct 86 ms 15476 KB Output is correct
25 Correct 86 ms 15516 KB Output is correct
26 Correct 165 ms 14836 KB Output is correct
27 Correct 135 ms 30444 KB Output is correct
28 Correct 131 ms 30332 KB Output is correct
29 Correct 146 ms 30556 KB Output is correct
30 Correct 83 ms 30116 KB Output is correct
31 Correct 3 ms 5032 KB Output is correct
32 Correct 135 ms 13160 KB Output is correct
33 Correct 149 ms 13152 KB Output is correct
34 Correct 136 ms 30332 KB Output is correct
35 Execution timed out 1085 ms 14328 KB Time limit exceeded
36 Halted 0 ms 0 KB -