Submission #582702

#	Time	Username	Problem	Language	Result	Execution time	Memory
582702		Omar_Elgedawy	Bosses (BOI16_bosses)	C++14	100 / 100	722 ms	640 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define cin(vec)        for(auto& i : vec) cin >> i
#define cout(vec)       for(auto& i : vec) cout << i << " "; cout << "\n";
#define fast            ios::sync_with_stdio(0);cin.tie(0);
#define loop(i,a,b)     for (int i = a; i < b; i++)
#define F               first
#define S               second
#define pb(n)           push_back(n)
#define pf(n)           push_front(n)
#define dci(d)          fixed<<setprecision(d)
#define sp              ' '
#define el              '\n'
#define all(v)          v.begin(),v.end()
#define int             long long
int dx[8]= {0,0,1,-1,-1,1,1,-1};
int dy[8]= {-1,1,0,0,-1,1,-1,1};
int const N=5e3+1,M=1e3+1,Mod=1e9+7;
vector<int>adj[N];
int cnt=0,sum=0;
int vis[N];
void bfs(int st){
  queue<pair<int,int>>q;
  q.push({st,1});
  vis[st]=1;
  cnt++;
  while(q.size()){
    pair<int,int>u=q.front();
    q.pop();
    sum+=u.S;
    for(auto v:adj[u.F]){
      if(!vis[v]){
        vis[v]=1;
        cnt++;
        q.push({v,u.S+1});
      }
    }
  }
}
void testcase(int h){
  int n;cin>>n;
  for(int i=1;i<=n;i++){
    int k ;cin>>k;
    while(k--){
      int v;cin>>v;
      adj[v].push_back(i);
    }
  }
  int ans=1e18;
  for(int i=1;i<=n;i++){
    memset(vis,0,sizeof vis);
    cnt=0,sum=0;
    bfs(i);
    if(cnt!=n)continue;
    ans=min(ans,sum);
  }
  cout<<ans<<el;
}
int32_t main()
{
  fast
  testcase(1);
  // int tc;cin>>tc;for(int i=1;i<=tc;i++)testcase(i);
  return 0;
}

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