Submission #329943

#	Time	Username	Problem	Language	Result	Execution time	Memory
329943		Sho10	Bosses (BOI16_bosses)	C++14	100 / 100	823 ms	876 KiB

bosses

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod (10*10*10*10*10*10*10*10*10+7)
#define PI 3.14159265359
#define MAXN 100005
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,k,ans=LINF,res=0,viz[5005];
vector<ll>g[5005];
void bfs(ll node){
queue<pair<ll,ll>>q;
viz[node]=1;
q.push(mp(node,0));
while(!q.empty()){
    pair<ll,ll>x=q.front();
    viz[x.f]=1;
    res+=1+x.s;
    q.pop();
    for(auto it : g[x.f]){
        if(viz[it]){
            continue;
        }
        viz[it]=1;
        q.push(mp(it,x.s+1));
    }
}
}
int32_t main(){
CODE_START;
cin>>n;
for(ll i=1;i<=n;i++)
{
cin>>k;
for(ll j=1;j<=k;j++)
{
    ll x;
    cin>>x;
    g[x].pb(i);
}
}
for(ll i=1;i<=n;i++)
{
memset(viz,0,sizeof(viz));
   res=0;
   bfs(i);
    ll s1=0;
    for(ll j=1;j<=n;j++)
    {
        if(viz[j]==0){
            s1++;
        }
    }
    if(s1==0){
           // cout<<i<<' '<<res<<endl;
        ans=min(ans,res);
    }
}
cout<<ans<<endl;
}

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