Submission #1309772

#TimeUsernameProblemLanguageResultExecution timeMemory
1309772freedommo33Bosses (BOI16_bosses)C++20
22 / 100
88 ms5200 KiB
#include <bits/stdc++.h> #define st first #define nd second #define pb push_back #define all(x) (x).begin(), (x).end() #define sz(x) (int)(x).size() #define mp(a, b) make_pair(a, b) using namespace std; template <typename H, typename T> ostream& operator<<(ostream& os, pair<H, T> p){ return os << "("<<p.st<<","<<p.nd<<")"; } template <typename H> ostream& operator<<(ostream& os, vector<H> v){ os << "{"; for(int i=0; i<sz(v); i++){ if(i) os<<" "; os<<v[i]; } os<<"}"; return os; } void debug() { cerr<<"\n"; } template <typename H, typename... T> void debug(H h, T... t) { cerr<<h; if(sizeof...(t)) cerr<<" "; debug(t...); } #define deb(x...) cerr<<__LINE__<<":"<<#x<<" -> "; debug(x); typedef long long ll; constexpr int M = 2e5+7, INF = 1e9+7, mod = 1e9+7, base = 1<<18; vector<vector<int>> g(M); vector<pair<int, int>> przo; int par[M]; int wyplata[M]; void dfs(int v, int p){ wyplata[v] = 1; for(auto i:g[v]) if(i != p){ dfs(i, v); wyplata[v] += wyplata[i]; } } void solve(){ int n; cin>>n; for(int i=1; i<=n; i++){ int a; cin>>a; for(int j=1; j<=a; j++){ int b; cin>>b; przo.pb({i, b}); } } int wynik = INF; //for(auto i:przo) cout<<i<<endl; for(int i=0; i<(1<<(sz(przo))); i++){ //for(int j=1; j<=sz(przo); j++){ // if(i & (1<<(j-1))) cout<<1; // else cout<<0; //} //cout<<" -> "; for(int j=1; j<=n; j++) par[j] = 0; for(int j=1; j<=sz(przo); j++){ if(i & (1<<(j-1))) par[ przo[j-1].first ] = przo[j-1].second; } int ile0 = 0; int korz = 0; for(int j=1; j<=n; j++) if(par[j] == 0) ile0++, korz = j; if(ile0 > 1) continue; for(int j=1; j<=n; j++) g[j].clear(); for(int j=1; j<=n; j++) if(j != korz){ g[par[j]].pb(j); g[j].pb(par[j]); } int kraw = 0; bool czy = 0; for(int j=1; j<=n; j++){ if(sz(g[j]) == 0){ czy = 1; break; } kraw += sz(g[j]); } if(czy == 1) continue; if(kraw != 2*n-2) continue; for(int j=1; j<=n; j++) wyplata[j] = 0; int aktWyn = 0; dfs(korz, 0); //cout<<endl; //for(int j=1; j<=n; j++){ // cout<<j<<": "; // for(auto k:g[j]) cout<<k<<" "; // cout<<endl; //} //cout<<endl; //for(int j=1; j<=n; j++) cout<<wyplata[j]<<" "; //cout<<endl; czy = 0; for(int j=1; j<=n; j++) if(wyplata[j] == 0){ czy = 1; break; } if(czy) continue; for(int j=1; j<=n; j++) aktWyn += wyplata[j]; //cout<<aktWyn<<endl; wynik = min(wynik, aktWyn); } cout<<wynik<<endl; } int main() { cin.tie(0)->sync_with_stdio(0); int t = 1; //cin>>t; while(t--) solve(); return 0; }
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