Submission #717846

#	Time	Username	Problem	Language	Result	Execution time	Memory
717846		nnin	Bosses (BOI16_bosses)	C++14	0 / 100	1 ms	340 KiB

bosses

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
using namespace std;

vector<int> adj[5002];
int n;

pii dfs(int curr, vector<bool> &vis) {
    vector<int> v;
    for(int next:adj[curr]) {
        if(!vis[next]) {
            vis[next] = 1;
            v.push_back(next);
        }
    }
    pii ans = {0, 1};
    for(int next:v) {
        pii tmp = dfs(next, vis);
        ans.f += tmp.f;
        ans.s += tmp.s;
    }
    ans.f += ans.s;
    return ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n;
    for(int i=1;i<=n;i++) {
        int k, v;
        cin>>k;
        while(k--) {
            cin>>v;
            adj[v].push_back(i);
        }
    }
    int ans = INT_MAX;
    for(int root=1;root<=n;root++) {
        vector<bool> vis(n+1, 0);
        vis[root] = 1;
        ans = min(ans, dfs(root, vis).f);
    }
    cout<<ans;
}

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