Submission #107169

#	Time	Username	Problem	Language	Result	Execution time	Memory
107169		SOIVIEONE	Bosses (BOI16_bosses)	C++14	67 / 100	1554 ms	22144 KiB

bosses

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>

#define INF 1000000021
#define MOD 1000000007
#define pb push_back
#define sqr(a) (a)*(a)
#define M(a, b) make_pair(a,b)
#define T(a, b, c) make_pair(a, make_pair(b, c))
#define F first
#define S second
#define all(x) (x.begin(), x.end())
#define deb(x) cerr << #x << " = " << x << '\n'
#define N 222222

using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

const ld pi = 2 * acos(0.0);
template<class T> bool umin(T& a, T b){if(a>b){a=b;return 1;}return 0;}
template<class T> bool umax(T& a, T b){if(a<b){a=b;return 1;}return 0;}
template<class T, class TT> bool pal(T a, TT n){int k=0;for(int i=0;i<=n/2;i++){if(a[i]!=a[n-i-1]){k=1;break;}}return k?0:1;}

//int month[] = {0,31,28,31,30,31,30,31,31,30,31,30,31};

vll v[N], g[N];
set<ll> s[N];
ll root;
ll dead[N], c[N], p[N], dp[N], used[N];
void dfs(int u, int e)
{
	ll sum = 0;
	for(auto it : g[u])
	{
		if(it != e)
		{
			dfs(it, u);
			sum += dp[it];
		}
	}
	dp[u] = sum + 1;
	return;
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	for(int i = 1; i <= n; i ++)
	{
		int x;
		cin >> x;
		while(x --)
		{
			ll o;
			cin >> o;
			v[o].pb(i);
		}
	}
	ll ans = 1e17;
	for(int i = 1; i <= n; i ++)
	{
		queue<int> q;
		for(int j = 1; j <= n; j ++)
			used[j] = p[j] = dp[j] = 0,
			g[j].clear();
		q.push(i);
		used[i] = 1;
		int cnt = 1;
		while(!q.empty())
		{
			int u = q.front();
			q.pop();
			for(auto it : v[u])
			{
				if(used[it])
					continue;
				used[it] = 1;
				cnt ++;
				q.push(it);
				p[it] = u;
								if(cnt == n)
					break;
			}
		}
		int kil = 0;
		for(int j = 1; j <= n; j ++)
			kil += (used[j] == 0);
		if(kil)
			continue;
		for(int j = 1; j <= n; j ++)
		{
			if(j == i) continue;
			g[p[j]].pb(j);
			g[j].pb(p[j]);
		}
		dfs(i, 0);
		ll res = 0;
		for(int j = 1; j <= n; j ++)
			res += dp[j];
		umin(ans, res);
	}
	cout << ans;


	





	getchar();
	getchar();
	return 0;
}

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