Submission #1111152

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111152		Ghulam_Junaid	Bosses (BOI16_bosses)	C++17	100 / 100	1033 ms	1360 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
 
const int N = 5e3 + 10;
int n, par[N], sz[N], ans;
vector<int> out[N], in[N], g[N];
bool seen[N];
 
void dfs(int v, int p = -1){
    sz[v] = 1;
    for (int u : g[v]){
        if (u == p) continue;
        dfs(u, v);
        sz[v] += sz[u];
    }
    ans += sz[v];
}
 
int main(){
    cin >> n;
    for (int i = 1; i <= n; i ++){
        int k, x;
        cin >> k;
        for (int j = 0; j < k; j ++){
            cin >> x;
            out[i].push_back(x);
            in[x].push_back(i);
        }
    }
 
    int output = 1e9;
    for (int root = 1; root <= n; root ++){     
        ans = 0;
        for (int i = 1; i <= n; i ++)
            g[i].clear(), seen[i] = 0;   
 
        queue<int> q;
        q.push(root);
        seen[root] = 1;
 
        while (!q.empty()){
            int v = q.front();
            q.pop();
 
            for (int u : in[v]){
                if (!seen[u]){
                    q.push(u);
                    seen[u] = 1;
 
                    g[u].push_back(v);
                    g[v].push_back(u);
                }
            }
        }
 
        bool all = 1;
        for (int i = 1; i <= n; i ++)
            all &= seen[i];
 
        if (all){
            dfs(root);
            output = min(output, ans);
        }
    }
 
    cout << output << endl;
}

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