Submission #458053

#	Time	Username	Problem	Language	Result	Execution time	Memory
458053		ZaZo_	Bosses (BOI16_bosses)	C++14	100 / 100	826 ms	680 KiB

bosses

//Sorry but iam targeting IOI :))
//NEVER LOSE HOPE
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
#define endl "\n"
#define ceil(a,b)   (a+(b-1))/b
#define all(v) v.begin(),v.end()
#define int long long int
#define Hidden ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
using namespace std;
const int N=3e4+10,mod = 1e9+7;
vector<int>edges[5001];
int mn=INT_MAX,val=0,n,ans=INT_MAX;
void bfs(int node)
{
  queue<pair<int,int>>q;
  q.push({node,1});
  int vis[5001]={0};
  vis[node]=1;
  int c=1;
  val=1;
  while(!q.empty())
  {
    int x=q.front().first , y=q.front().second;
    q.pop();
    for(auto i : edges[x])
    {
      if(!vis[i])
        vis[i]=1,q.push({i,y+1}),c++,val+=y+1;
    }
    //cout<<endl;
    if(c==n) break;
  }
  if(c==n) mn=min(mn,val);
}
int32_t main(){
  cin>>n;
  for(int i = 1 ; i <= n ; i ++)
  {
    int k;
    cin>>k;
    while(k--)
    {
      int x;
      cin>>x;
      edges[x].push_back(i);
    //  edges[x].push_back(i);
    }
  }
  for(int i = 1 ; i <= n ; i++)
  {
    bfs(i);
    ans=min(mn,ans);
    mn=INT_MAX;
  }
  cout<<ans<<endl;
}

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