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Submission #485982

# Submission time Handle Problem Language Result Execution time Memory
485982 2021-11-10T03:41:08 Z chungdinh Bosses (BOI16_bosses) C++17
100 / 100
 792 ms 660 KB 
#include <iostream>
#include <utility>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>

using namespace std;

#define ii pair<int, int>
#define ll long long
#define MP(x, y) make_pair(x, y)

const int N = 5e3 + 5;
const ll INF = 1e18;

int n;
vector<int> g[N];

bool vsd[N];
ll dp[N];

vector<int> lst;
ll bfs(int u) {
    ll res = 0;

    queue<int> q; q.push(u);
    memset(vsd, false, sizeof vsd); vsd[u] = true;
    memset(dp, 0ll, sizeof dp); dp[u] = 1;

    while (q.size()) {
        int u = q.front(); q.pop();
        res += dp[u];

        for (int v : g[u]) {
            if (!vsd[v]) {
                vsd[v] = true;
                q.push(v);
                dp[v] = dp[u] + 1;
            }
        }
    }
    for (int i = 1; i <= n; i++) if (!vsd[i]) return INF;

    return res;
}

int main() {
    #ifdef CHUNGDINH
    freopen("main.inp", "r", stdin);
    #endif // CHUNGDINH

    cin >> n;
    for (int i = 1; i <= n; i++) {
        int k; cin >> k;
        while (k--) {
            int u; cin >> u;
            g[u].push_back(i);
        }
    }

    ll res = INF;
    for (int i = 1; i <= n; i++) res = min(res, bfs(i));
    cout << res;
}

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 420 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 0 ms 460 KB Output is correct
6 Correct 0 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 420 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 5 ms 460 KB Output is correct
13 Correct 6 ms 460 KB Output is correct
14 Correct 145 ms 552 KB Output is correct
15 Correct 8 ms 460 KB Output is correct
16 Correct 523 ms 636 KB Output is correct
17 Correct 792 ms 660 KB Output is correct
18 Correct 721 ms 656 KB Output is correct