Submission #1066397

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066397		boris_7	Bosses (BOI16_bosses)	C++17	0 / 100	0 ms	348 KiB

bosses

#include<bits/stdc++.h>

using namespace std;
using ll = long long;

vector<vector<ll>>gp;
vector<ll>vis;
vector<ll> sub;
ll ans = LLONG_MAX,cnt=0;

void dfs(ll u){
    for(ll &i:gp[u]){
        if(!vis[i]){
            vis[i]=1;
            dfs(i);
            sub[u]+=sub[i];
        }
    }
    cnt+=sub[u];
    if(vis[u]==2 && cnt>gp.size()){
        ans = min(ans,cnt);
    }
}

void solve(){
    ll n;
    cin>>n;
    gp = vector<vector<ll>>(n);
    for(ll i =0;i<n;i++){
        ll x;
        cin>>x;
        while(x--){
            ll v;
            cin>>v;
            gp[--v].push_back(i);
        }
    }
    for(ll i = 0;i<n;i++){
        vis = vector<ll>(n);
        sub = vector<ll>(n,1);
        vis[i]=2;
        cnt = 0;
        dfs(i);
    }
    cout<<ans<<endl;
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // ll t;cin>>t;while(t--)
        solve();
}

Compilation message (stderr)

bosses.cpp: In function 'void dfs(ll)':
bosses.cpp:20:24: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     if(vis[u]==2 && cnt>gp.size()){
      |                     ~~~^~~~~~~~~~

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