Submission #68897

#	Time	Username	Problem	Language	Result	Execution time	Memory
68897		MANcity	Bosses (BOI16_bosses)	C++14	67 / 100	1572 ms	1260 KiB

bosses

///GAGO_O
#include<iostream>
#include<cstdio>
#include<fstream>
#include<algorithm>
#include<cmath>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<string>
#include<cstring>
#include<vector>
using namespace std;
#define for1(i,n) for(int i=1;i<=(int)n;i++)
#define for0(i,n) for(int i=0;i<=(int)n;i++)
#define forn(i,n) for(int i=n;i>=1;i--)
#define fo(i,x,y) for(int i=x;i<=(int)y;i++)
#define fr(i,x,y) for(int i=x;i>=(int)y;i--)
#define pb push_back
#define mp make_pair
#define LL long long
const LL Mod=1000*1000*1000+7;
int n;
int used[5002];
vector<vector<int> > g(5002);
vector<vector<int> > G(5002);
int ANS=0;
int dfs(int v)
{
    if(G[v].size()==0)
    {
        ANS+=1;
        return 1;
    }
    int S=0;
    for0(j,G[v].size()-1)
    {
        int to=G[v][j];
        S+=dfs(to);
    }
    ANS+=(S+1);
    return (S+1);
}
int bfs(int x)
{
    ANS=0;
    for1(i,n)
        used[i]=0;
    for1(i,n)
        G[i].clear();
    int X=x;
    queue<int> q;
    q.push(x);
    used[x]=1;
    while(!q.empty())
    {
        int x=q.front();
        for0(j,g[x].size()-1)
        {
            int to=g[x][j];
            if(used[to]==0)
            {
                used[to]=1;
                G[x].push_back(to);
                q.push(to);
            }
        }
        q.pop();
    }
    for1(i,n)
        if(used[i]==0)
            return (100000000);
    dfs(X);
    return ANS;
}
int main()
{
    cin>>n;
    for1(i,n)
    {
        int k;
        cin>>k;
        for1(j,k)
        {
            int x;
            cin>>x;
            g[x].push_back(i);
        }
    }
    int ans=100000000;
    for1(i,n)
        ans=min(ans,bfs(i));
    cout<<ans<<endl;
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 0 / 33