Submission #207942

#	Time	Username	Problem	Language	Result	Execution time	Memory
207942		Blerargh	Bosses (BOI16_bosses)	C++17	67 / 100	1309 ms	262148 KiB

bosses

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> ii;
typedef pair<ld,ld> id;

#define FOR(i, a, b) for(int i=(a); i<=(b); i++)
#define ROF(i, a, b) for(int i=(a); i>=(b); i--)
#define MEM(x, v) memset(x, v, sizeof(x))
#define SORT(x) sort((x).begin(), (x).end())
#define CMPSORT(x, cp) sort((x).begin(), (x).end(), cp)
#define FAST ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define getchar_unlocked _getchar_nolock

#define f first
#define s second
#define ins insert
#define e emplace
#define eb emplace_back
#define ef emplace_front
#define p push
#define pf push_front
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ft front
#define bk back
#define pp pop
#define ppb pop_back
#define ppf pop_front

#define db cout<<"YEET\n";
#define ct(x) cout<<x<<'\n';

const ll MOD = 1e9+7; //998244353
const ll MX = 2e5+5;
const ll INF = 1e18;
const ld PI = acos((ld)-1);

vector<ll> dfsadjlist[10010];
ll preorder[10010], idx=0, salary=0, cnt;
ll n, k, x;
ll minn=INF;
bool visited[10010];
queue<ii> bfs;


void dfs(ll node, ll parent){
    preorder[node] = ++idx;
    for (auto edge : dfsadjlist[node]){
        if (edge != parent) dfs(edge, node);
    }
    ll subtreesize = idx-preorder[node]+1;
    salary+=subtreesize;
    return;
}

int main(){ 
    FAST
    vector<ll> adjlist[10010];
    cin >> n;
    FOR(i, 1, n){
        cin >> k;
        FOR(j, 1, k){
            cin >> x;
            adjlist[x].pb(i);
        }
    }

    FOR(i, 1, n){
        MEM(visited, 0);
        MEM(dfsadjlist, 0);

        cnt=0;
        bfs.e(i, -1);
        while (!bfs.empty()){
            ll node = bfs.ft().f;
            ll parent = bfs.ft().s;
            bfs.pp();
            if (visited[node]) continue;
            visited[node] = true;
            if (parent!=-1) dfsadjlist[parent].pb(node);
            cnt++;
            for (auto edge : adjlist[node]){
                if (visited[edge]) continue;
                bfs.e(edge,node);
            }
        }

        if (cnt != n) continue;
        salary=0;
        dfs(i, i);
        minn=min(minn, salary);
    }
    cout << minn;
}

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