| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 208078 | Blerargh | Bosses (BOI16_bosses) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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 ll int
#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[5005], adjlist[5005];
ll preorder[5005], idx=0, salary=0, cnt;
ll n, k, x;
ll minn=INF;
bool visited[5005];
queue<ll> 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
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);
FOR(j, 1, n) dfsadjlist[j].clear();
cnt=0;
bfs.e(i);
visited[i]=1;
while (!bfs.empty()){
ll node = bfs.ft();
cnt++;
bfs.pp();
for (auto edge : adjlist[node]){
if (visited[edge]) continue;
bfs.e(edge);
visited[edge]=1;
dfsadjlist[node].pb(edge);
}
}
if (cnt != n) continue;
salary=0;
dfs(i, i);
minn=min(minn, salary);
}
cout << minn;
}