Submission #1075719

#	Time	Username	Problem	Language	Result	Execution time	Memory
1075719		Mighilon	Bosses (BOI16_bosses)	C++17	0 / 100	39 ms	460 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
 
#ifdef DEBUG
#include "../Library/debug.h"
#else
#define dbg(x...)
#endif
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl; 
 
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define F0R(i, a) for (int i = 0; i < (a); ++i)
#define FORd(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define F0Rd(i, a) for (int i = (a) - 1; i >= 0; --i)
#define trav(a, x) for (auto& a : x)
#define f first 
#define s second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
 
const char nl = '\n';
const int INF = 1e9;
const int MOD = 1e9 + 7;
 
vector<vi> adj, p;
vector<bool> vis;
vl a;
int n;
vector<vi> childs;

void dfs(int u){
    vis[u] = true;
    trav(v, childs[u]){
        dfs(v);
    }
}
 
bool bfs(vi cost){
    childs.clear();
    childs.resize(n);
    vi par(n);
    int cnt = 0;
    F0R(i, n){
        par[i] = i;
        trav(u, p[i]){
            if(cost[u] < cost[par[i]])
                par[i] = u;
        }
        if(par[i] == i)
            cnt++;
    }
    if(cnt != 1)
        return false;
    F0R(i, n){
        if(par[i] == i)
            continue;
        childs[par[i]].pb(i);
    }
    F0R(i, n){
        if(par[i] == i){
            dfs(i);
            break;
        }
    }
    if(accumulate(all(vis), 0) != n)
        return false;
    vis.assign(n, false);
    queue<int> q;
    F0R(i, n){
        if(childs[i].empty()){
            dbg(i)
            q.push(i), vis[i] = true;
        }
    }
    while(!q.empty()){
        int u = q.front();
        q.pop();
        if(par[u] == u)
            continue;
        a[par[u]] += a[u];
        if(!vis[par[u]])
            q.push(par[u]), vis[par[u]] = true;
    }
    dbg(par)
    return true;
}
 
void solve(){
    cin >> n;
    adj.resize(n);
    p.resize(n);
    vis.resize(n);
    a.resize(n);
    F0R(i, n){
        int x; cin >> x;
        F0R(j, x){
            int a;
            cin >> a;
            a--;
            adj[a].pb(i);
            p[i].pb(a);
        }
    }
    ll mn = 1e18;
    vi cost(n);
    F0R(i, n) cost[i] = i;
    do{
        vis.assign(n, false);
        a.assign(n, 1);
        if(!bfs(cost)) continue;
        dbg(a);
        dbg(childs)
        mn = min(mn, accumulate(all(a), 0LL));
    }while(next_permutation(all(cost)));
    cout << mn << nl;
}
 
int32_t main(){
    ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    
    int TC = 1;
    // cin >> TC;
    while(TC--){
        solve();
    }
    return 0;
}

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