Submission #478474

#	Time	Username	Problem	Language	Result	Execution time	Memory
478474		Shin	Bosses (BOI16_bosses)	C++14	100 / 100	701 ms	5280 KiB

bosses

#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define all(x) x.begin(), x.end()

using namespace std;
const int N = 2e5 + 7;
const int MOD = 1e9 + 7; // 998244353;
const int INF = 1e9 + 7;
const long long INFLL = 1e18 + 7;

template <class X, class Y> bool minimize(X &a, Y b) {
    if (a > b) return a = b, true;
    return false;
}
template <class X, class Y> bool maximize(X &a, Y b) {
    if (a < b) return a = b, true;
    return false;
}

int n;
vector<int> adj[N];
void solve(void) {
    cin >> n;
    for (int i = 1; i <= n; i ++) {
        int k; cin >> k;
        while (k --) {
            int v; cin >> v;
            adj[v].push_back(i);
        }
    }

    long long res = INFLL;
    for (int root = 1; root <= n; root ++) {
        queue<int> q;
        q.push(root);

        vector<int> level(n + 1, 0);
        level[root] = 1;
        long long sum = 0;
        int cnt = 0;

        while (!q.empty()) {
            int u = q.front(); q.pop();
            sum += level[u];
            cnt ++;
            for (int v: adj[u]) if (level[v] == 0) {
                level[v] = level[u] + 1;
                q.push(v);
            }
        }
        if (cnt == n) minimize(res, sum);
    }

    cout << res;
}

int main(void) {
    cin.tie(0)->sync_with_stdio(0); 
    int test = 1;
    // cin >> test;
    while (test --) {
        solve();
    }
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33