Submission #695148

#	Time	Username	Problem	Language	Result	Execution time	Memory
695148		edogawa_something	Bosses (BOI16_bosses)	C++17	100 / 100	1437 ms	94596 KiB

bosses

#include<bits/stdc++.h>
#include<chrono>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef string st;
typedef bool bl;
typedef vector<ll> vii;
typedef pair<ll,ll> pii;
typedef vector<pii> vpi;
#define pu push
#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
#define fast ios_base::sync_with_stdio(0);cin.tie();
#define test ll qqqqq;cin>>qqqqq;while(qqqqq--)
#define F first
#define S second
#define forn(i,n) for(ll i=0;i<n;i++)
#define forx(i,j,n) for(ll i=j;i<n;i++)
#define pb push_back
#define pob pop_back
#define all(v) v.begin(),v.end()
#define lb lower_bound
#define ub upper_bound
#define pof pop_front
#define pow powww
#define prtll(x) printf("%lld",x)
#define prtld(x) printf("%Lf",x)
#define prtst(x) printf("%s",x)
#define prtch(x) printf("%c",x)
#define measure chrono::high_resolution_clock::now()
const ll dx[]{1,0,-1,0};
const ll dy[]{0,-1,0,1};
const ll inf=2e18;
const ll mod=1e9+7;
const ll LM=2e7+1;
const ll M=2e6+1;
const ll MM=1002;
const ll MMM=501;
const ld pi=acos(-1);
//const ll mod=998244353;
ll pow(ll r,ll to,ll m=mod){
  ll res=1;
  r%=mod;
  while(to){
    if((to&1)){
      res*=r,res%=mod;
    }
    r*=r,r%=mod;
    to=(to>>1);
  }
  return res;
}
int n,ans;
vector<int> k[M];
bl vis[M];
vector<int> v[M];
int salary[M];
int dfs(int r){
  int res=1;
  for(auto it:v[r])
  res+=dfs(it);
  salary[r]=res;
  return salary[r];
}
ll chk(ll r){
  forx(i,1,n+1)
  vis[i]=0;
  forx(i,1,n+1)
  v[i].clear();
  queue<int>q;
  q.push(r);
  vis[r]=1;
  while(q.size()){
    int x=q.front();
    q.pop();
    for(auto it:k[x]){
      if(vis[it])
      continue;
      v[x].pb(it),q.push(it),vis[it]=1;
    }
  }
  forx(i,1,n+1){
    if(!vis[i])
    return inf;
  }
  ll res=0;
  dfs(r);
  forx(i,1,n+1)
  res+=salary[i];
  return res;
}
int main(){
  fast
  ll ans=inf;
  cin>>n;
  forn(i,n){
    ll x;
    cin>>x;
    while(x--){
      ll y;
      cin>>y;
      k[y].pb(i+1);
    }
  }
  forx(i,1,n+1)
  ans=min(ans,chk(i));
  cout<<ans;
  return 0;
}
/*

*/

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