Submission #107197

#	Time	Username	Problem	Language	Result	Execution time	Memory
107197		SOIVIEONE	Bosses (BOI16_bosses)	C++14	100 / 100	707 ms	5880 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 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];
ll dead[N];
int main()
{
	int n;
	cin >> n;
	for(int i = 1; i <= n; i ++)
	{
		int x;
		cin >> x;
		while(x --)
		{
			int o;
			cin >> o;
			v[o].pb(i);
		}
	}
	ll ans = 1e17;
	for(int k = 1; k <= n; k ++)
	{
		queue<int> q;
		for(int i = 1; i <= n; i ++)
			dead[i] = 0;
		q.push(k);
		int cnt = 0;
		dead[k] = 1;
		ll res = 1;
		while(q.size())
		{
			int u = q.front();
			q.pop();
			for(auto it : v[u])
			{
				if(dead[it] == 0)
				{
					cnt ++;
					dead[it] = dead[u] + 1;
					res += dead[it];
					q.push(it);
				}
			}
		}
		if(cnt == n - 1)
			umin(ans, res);
	}
	cout << ans;





	





	getchar();
	getchar();
	return 0;
	//ios::sync_with_stdio(false);
	//cin.tie(0);
}

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