Submission #113327

#	Time	Username	Problem	Language	Result	Execution time	Memory
113327		MAMBA	Bosses (BOI16_bosses)	C++17	100 / 100	419 ms	760 KiB

bosses

#include <bits/stdc++.h> 

using namespace std;

#define rep(i , j , k) for (int i = j; i < (int)k; i++)
#define pb push_back
#define mt make_tuple
#define all(x) x.begin(),x.end()

typedef long long ll;
typedef pair<int , int> pii;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef complex<ld> point;
typedef pair<ld , ld> pld;
typedef vector<int> vi;

inline void fileIO(string s) {
	//	freopen((s + ".in").c_str(), "r", stdin);
	freopen((s + ".out").c_str(), "w", stdout);
}

template<class T , class S>
inline bool smin(T &a, S b) { return (T)b < a ? a = b , 1 : 0; }
template<class T , class S>
inline bool smax(T &a, S b) { return a < (T)b ? a = b , 1 : 0; }

constexpr int N = 5e3 + 10;

constexpr int MOD = 1e6 + 7;

template<typename T>
inline T mod(T &v) { return v = (v % MOD + MOD) % MOD; }
template<typename S, typename T>
inline S add(S &l, T r) { return mod(l += r); }

int n, m;
int dist[N];
vi adj[N];

int q[N], l , r;

int ans = 1e9;

inline void bfs(int s) {
	memset(dist,63, sizeof(dist));
	dist[s] = 1;
	q[l = r = 0] = s;
	r++;
	while (l < r) {
		int v = q[l++];
		for (auto e :adj[v])
			if (smin(dist[e] , dist[v] + 1)) 
				q[r++] = e;
	}
	if (r == n) 
		smin(ans , accumulate(dist , dist + n , 0));
	return;
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);

#ifndef LOCAL
	//fileIO("superposition");
#endif

	cin >> n;
	rep(i , 0 , n) 
	{
		int k; cin >> k;
		rep(j , 0 , k) {
			int v; cin >> v;
			adj[v - 1].pb(i);
		}
	}
	rep(i , 0 , n) 
		bfs(i);

	cout << ans << endl;	
	return 0;

}

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