Submission #860279

#	Time	Username	Problem	Language	Result	Execution time	Memory
860279		arashMLG	Bosses (BOI16_bosses)	C++17	100 / 100	426 ms	860 KiB

bosses

#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

//https://quera.org/profile/4dykhk

typedef long long     ll;
typedef long double   ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 5e3 + 23;
const int sq = 450;
const ll mod = 1e9+7; // 998244353
const int LOG = 23;
const ll inf = 5e18;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define F           first
#define S           second
#define pb          push_back
#define ms(x,y)     memset((x) , (y) , sizeof (x))
#define done        return cout<<endl , 0;
#define kill(x)     cout<<x<<endl, exit(0);
#define isIn(x,s,e) ((x) >= (s) && (x) <= e)
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define pc(x)       __builtin_popcount(x)
#define ctz(x)      __builtin_ctz(x)
#define MinHeap(x)  priority_queue<x, vector<x> , greater<x> >
#define MaxHeap(x)  priority_queue<x, vector<x>>
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int      ll

ll pw(ll a, ll b, ll md = mod){ll res = 1; while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n;
int h[N];
int ans = inf;
vector<int> G[N];
queue<int> Q;
bool mark[N];

void bfs(int s) {
	ms(mark,0);
	h[s] = 1;
	mark[s] = true;
	Q.push(s);
	int javab = 0;
	while(sz(Q)) {
		int v = Q.front(); Q.pop();
		javab += h[v];
		for(int u : G[v]) if(!mark[u]) {
			h[u] = h[v] + 1;
			mark[u] = true;
			Q.push(u);
		}
	}
	for(int i =1; i<= n ; i++) if(!mark[i]) return;
	ans =min(ans,javab); 
}

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n;
	for(int i = 1; i<= n ;i ++) {
		int k; cin>>k;
		for(int j= 1; j<= k ; j++) {
			int x; cin>>x;
			G[x].pb(i);
		}
	}
	for(int i =1; i<= n ; i++) {
		bfs(i);
	}
	cout<<ans;
	done;
}

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