Submission #373920

#	Time	Username	Problem	Language	Result	Execution time	Memory
373920		Aryan_Raina	Bosses (BOI16_bosses)	C++14	0 / 100	1 ms	492 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define ld long double
#define ar array

const int INF = 1e15;
const int MOD = 1e9+7;

const int MXN = 5005;

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

int bfs(int rt) {
    vector<bool> vis(n, 0);
    queue<int> q;
    vector<ar<int,2>> ch[n];
    q.push(rt);
    vis[rt] = 1;
    auto nextLayer = [&](int u) {
        int lol = 0;
        for (int v : g[u]) if (!vis[v]) lol++;
        return lol;
    };
    while (!q.empty()) {
        int u = q.front();
        q.pop();
        for (int v : g[u]) if (!vis[v]) {
            ch[u].push_back({nextLayer(v), v});
            vis[v] = 1;
        }
        sort(ch[u].begin(), ch[u].end());
        for (auto v : ch[u]) q.push(v[1]);
    }
    int ans = 0;
    function<int(int)> dfs = [&](int u) {
        int cur = 1;
        for (ar<int,2> v : ch[u]) {
            cur += dfs(v[1]);
        }
        ans += cur;
        return cur;
    };
    dfs(rt);
    return ans;
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    for (int i = 0; i < n; i++) {
        int x; cin>>x;
        while (x--) {
            int j; cin>>j; --j;
            g[j].push_back(i);
        }
    }
    int ans = INF;
    for (int i = 0; i < n; i++) ans = min(ans, bfs(i));
    cout<<ans<<"\n";
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33