Submission #952811

#	Time	Username	Problem	Language	Result	Execution time	Memory
952811		sondos225	Bosses (BOI16_bosses)	C++17	100 / 100	423 ms	824 KiB

bosses

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T>using ordered_set = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;//find_by_order(ind);
//order_of_key()
#define int long long
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define yes "YES"
#define no "NO"
#define bigg INT_MAX
#define debug(x) cout<<(#x)<<" = " <<x<<endl;
#define all(x) x.begin(),x.end()
#define sz size()
#define nn '\n'
#define mms(x,y) memset(x,y,sizeof(x))
#define forr(i,j,n) for (int i=j; i<n; i++)
#define forn(i,j,n) for (int i=j; i>n; i--)
#define fi first
#define se second
#define la "LA"
#define cinn(x,y) for(int i=0; i<y; i++) cin>>x[i];
#define pii pair<int,int>
#define vi vector<int>
signed main()
{
//    #ifndef LOCAL
//    freopen("lifeguards.in","r",stdin);
//    freopen("lifeguards.out","w", stdout);
//    #endif
    fast
    int n;
    cin>>n;
    vi a[n+1];
    forr(i,0,n)
    {
        int w;
        cin>>w;
        while(w--)
        {
            int x;
            cin>>x;
            a[x].pb(i+1);
        }
    }
        int ans=bigg;
        forr(i,1,n+1)
        {
            //big boss
        int depth[n+1]={ };
        queue <int> q;
        q.push(i);
        depth[i]=1;

        while(!q.empty())
        {
            int x=q.front();
            q.pop();
            //out<<x<<endl;
            for(auto y:a[x])
            {
               // cout<<yes<<y<<' '<<depth[y]<<endl;
                if (depth[y]==0)
                {
                    depth[y]=depth[x]+1;
                    q.push(y);
                }
            }
        }
        int cur=0;
        forr(j,1,n+1)
            {
                //cout<<j<<' '<<depth[j]<<endl;
                int t=depth[j];
               if (t==0){ cur=bigg; break; }
               cur+=t;
            }
            ans=min(ans,cur);
        }
        cout<<ans;
    return 0;
}

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