Submission #858316

#	Time	Username	Problem	Language	Result	Execution time	Memory
858316		8pete8	Bosses (BOI16_bosses)	C++14	0 / 100	1 ms	604 KiB

bosses

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset>
#include<list>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define p push
#define pb push_back
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
#define int long long
const int mxn=5005,mod=69,lg=42,root=80,inf=1e18;
vector<int>adj[mxn+10];
bitset<mxn+10>on;
int n;
int solve(int root){
    on.reset();
    queue<int>q;
    vector<int>go[mxn+10],val(n+1);
    q.push(root);
    vector<pii>d(n);
    for(int i=0;i<n;i++)d[i].s=i+1;
    while(!q.empty()){
        int cur=q.front();
        q.pop();
        on[cur]=true;
        for(auto i:adj[cur]){
            if(on[i])continue;
            d[i-1].f=d[cur-1].f+1;
            q.push(i);
            go[cur].pb(i);
        }
    }
    sort(rall(d));
    for(int i=0;i<n;i++){
        for(auto j:go[d[i].s])val[d[i].s]+=val[j];
        val[d[i].s]++;
    }
    for(int i=1;i<=n;i++)if(!on[i])return inf;
    int sum=0;
    for(int i=1;i<=n;i++)sum+=val[i];
    return sum;
}
int32_t main(){
    fastio
    cin>>n;
    for(int i=1;i<=n;i++){
        int a;cin>>a;
        for(int j=0;j<a;j++){
            int v;cin>>v;
            adj[v].pb(i);
        }
    }

    int ans=inf;
    for(int i=1;i<=n;i++)ans=min(ans,solve(i));
    cout<<ans;
}

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