제출 #107169

#제출 시각아이디문제언어결과실행 시간메모리
107169SOIVIEONEBosses (BOI16_bosses)C++14
67 / 100
1554 ms22144 KiB
#include <bits/stdc++.h> //#include <ext/pb_ds/assoc_container.hpp> #define INF 1000000021 #define MOD 1000000007 #define pb push_back #define sqr(a) (a)*(a) #define M(a, b) make_pair(a,b) #define T(a, b, c) make_pair(a, make_pair(b, c)) #define F first #define S second #define all(x) (x.begin(), x.end()) #define deb(x) cerr << #x << " = " << x << '\n' #define N 222222 using namespace std; //using namespace __gnu_pbds; typedef long double ld; typedef long long ll; typedef pair<int,int> pii; typedef pair<ll, ll> pll; typedef vector<int> vi; typedef vector<ll> vll; //typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; const ld pi = 2 * acos(0.0); template<class T> bool umin(T& a, T b){if(a>b){a=b;return 1;}return 0;} template<class T> bool umax(T& a, T b){if(a<b){a=b;return 1;}return 0;} template<class T, class TT> bool pal(T a, TT n){int k=0;for(int i=0;i<=n/2;i++){if(a[i]!=a[n-i-1]){k=1;break;}}return k?0:1;} //int month[] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; vll v[N], g[N]; set<ll> s[N]; ll root; ll dead[N], c[N], p[N], dp[N], used[N]; void dfs(int u, int e) { ll sum = 0; for(auto it : g[u]) { if(it != e) { dfs(it, u); sum += dp[it]; } } dp[u] = sum + 1; return; } int main() { ios::sync_with_stdio(false); cin.tie(0); int n; cin >> n; for(int i = 1; i <= n; i ++) { int x; cin >> x; while(x --) { ll o; cin >> o; v[o].pb(i); } } ll ans = 1e17; for(int i = 1; i <= n; i ++) { queue<int> q; for(int j = 1; j <= n; j ++) used[j] = p[j] = dp[j] = 0, g[j].clear(); q.push(i); used[i] = 1; int cnt = 1; while(!q.empty()) { int u = q.front(); q.pop(); for(auto it : v[u]) { if(used[it]) continue; used[it] = 1; cnt ++; q.push(it); p[it] = u; if(cnt == n) break; } } int kil = 0; for(int j = 1; j <= n; j ++) kil += (used[j] == 0); if(kil) continue; for(int j = 1; j <= n; j ++) { if(j == i) continue; g[p[j]].pb(j); g[j].pb(p[j]); } dfs(i, 0); ll res = 0; for(int j = 1; j <= n; j ++) res += dp[j]; umin(ans, res); } cout << ans; getchar(); getchar(); return 0; }
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