Submission #349306

#	Time	Username	Problem	Language	Result	Execution time	Memory
349306		sinamhdv	Bosses (BOI16_bosses)	C++11	100 / 100	763 ms	876 KiB

bosses

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int mod = 1000 * 1000 * 1000 + 7;
const int INF = 1000 * 1000 * 1000;
const ll LINF = (ll)INF * INF;

#ifdef DEBUG
#define dbg(x) cout << #x << " = " << (x) << endl << flush;
#define dbgr(s, f) { cout << #s << ": "; for (auto _ = (s); _ != (f); _++) cout << *_ << ' '; cout << endl << flush; }
#else
#define dbg(x) ;
#define dbgr(s, f) ;
#endif
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define fast_io ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define msub(a, b) ((mod + ((ll)(a) - (b)) % mod) % mod)
#define mdiv(a, b) ((ll)(a) * poww((b), mod - 2) % mod)
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define mp make_pair
#define fr first
#define sc second
#define endl '\n'

#define MAXN 5050

vector<int> cld[MAXN];
int h[MAXN];
ll ans = LINF;
int n;
bool mark[MAXN];

void bfs(int r)
{
	memset(mark, 0, sizeof(mark));
	fill(h, h + n + 5, INF);
	h[r] = 0;
	queue<int> q;
	q.push(r);
	mark[r] = true;
	while (!q.empty())
	{
		int v = q.front();
		q.pop();
		for (int u : cld[v])
		{
			if (mark[u])
				continue;
			h[u] = h[v] + 1;
			mark[u] = true;
			q.push(u);
		}
	}
}

int32_t main(void)
{
	fast_io;
	cin >> n;
	FOR(i, 1, n + 1)
	{
		int k;
		cin >> k;
		FOR(j, 0, k)
		{
			int x;
			cin >> x;
			cld[x].pb(i);
		}
	}

	FOR(i, 1, n + 1)
	{
		bfs(i);
		ll sm = 0;
		bool ok = true;
		FOR(i, 1, n + 1)
		{
			sm += h[i];
			if (h[i] >= INF)
				ok = false;
		}
		dbg(i);
		dbgr(h + 1, h + n + 1);
		if (ok)
			ans = min(ans, sm);
	}

	cout << ans + n << endl;
	return 0;
}

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