Submission #1008508

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008508		vjudge1	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	604 KiB

bosses

#include <bits/stdc++.h>

#define suiii ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define co cout<<
// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff
vector<ll>v[5005];
vector<ll>v1[5005];
ll n;
ll vis[5005];
pair<ll,ll>dfs(ll x,ll last){
    ll ans=1;
    ll ans1=0;
    for(auto i:v1[x]){
        if(i==last) continue;
        pair<ll,ll>a=dfs(i,x);
        ans+=a.first;
        ans1+=a.second;
    }
    ans1+=ans;
    return {ans,ans1};
}
ll bfs(ll x){
    memset(vis,0,sizeof(vis));
    for(int i=0;i<=n;i++) v1[i].clear();
    ll ans=0;
    queue<ll>q;
    q.push(x);
    while(q.size()){
        ll idx=q.front();
        q.pop();
        if(vis[idx]) continue;
        vis[idx]=1;
        for(auto i:v[idx]){
            if(vis[i]) continue;
            v1[idx].push_back(i);
            q.push(i);
        }
    }
    memset(vis,0,sizeof(vis));
    return dfs(x,0).second;
}
void solve(){
    cin>>n;
    ll ans=1e18;
    for(int i=1;i<=n;i++){
        ll k;
        cin>>k;
        for(int j=0;j<k;j++){
            ll b;
            cin>>b;
            v[b].push_back(i);
        }
    }
    for(int i=1;i<=n;i++){
        ans=min(ans,bfs(i));
    }
    co ans;
}
int main()
{
    suiii
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'long long int bfs(long long int)':
bosses.cpp:29:8: warning: unused variable 'ans' [-Wunused-variable]
   29 |     ll ans=0;
      |        ^~~

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