Submission #865942

#	Time	Username	Problem	Language	Result	Execution time	Memory
865942		ReLice	Bosses (BOI16_bosses)	C++17	100 / 100	419 ms	764 KiB

bosses

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define sz size()
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define bc back()
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=1e18+7;
const ll mod=998244353;
const ll N=5e3+7;
const ld eps=1e-9;
ll d[N];
ll i,n;
vector <vector <ll>> g(N);
ll go(ll v){
	for(i=1;i<=n;i++) d[i]=0;
	queue<ll> q;
	q.push(v);
	d[v]=1;
	while(q.sz){
		ll x=q.front();
		q.pop();
		for(auto i : g[x]){
			if(d[i]>0)continue;
			d[i]=d[x]+1;
			q.push(i);
		}
	}
	ll c=0;
	bool flag=true;
	for(i=1;i<=n;i++){
		if(d[i]==0) {flag=false;break;}
		c+=d[i];
	}
	if(flag) return c;
	else return inf;
}
void solve(){
    ll i,j;
	ll b,m;
	cin>>n;
	ll ans=inf;
	for(i=1;i<=n;i++){
		cin>>m;
		for(j=0;j<m;j++){
			cin>>b;
			g[b].pb(i);
		}
	}
	for(i=1;i<=n;i++){
		ans=min(ans,go(i));
	}
	cout<<ans<<endl;
}

signed main(){
    start();
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    ll t=1;
    //cin>>t;
    while(t--) solve();
}
/*

*/

Compilation message (stderr)

bosses.cpp: In function 'void fre(std::string)':
bosses.cpp:24:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:24:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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