이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#pragma once
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double db;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ld> vld;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<pld> vpld;
typedef vector<vi> vvi;
typedef tuple<ll, ll, ll> t3;
typedef tuple<ll, ll, ll, ll> t4;
template<typename T> using pq = priority_queue<T>;
template<typename T> using pqg = priority_queue<T, vector<T>, greater<T>>;
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define st first
#define nd second
#define lb lower_bound
#define ub upper_bound
#define all(x) (x).begin(), (x).end()
#define ins insert
template<typename T> bool ckmin(T &a, const T &b) { return b < a ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9 + 7;
const int INF = 0x3fffffff;
const ll LINF = 0x1fffffffffffffff;
const char nl = '\n';
const int MX = 5e3 + 3;
vi adj[MX];
int dis[MX];
int check(int i, int n) {
queue<int> q;
q.push(i);
int ret = 0;
dis[i] = 1;
while (!q.empty()) {
int a = q.front(); q.pop();
ret += dis[a];
for (auto b : adj[a]) {
if (!dis[b]) {
dis[b] = dis[a] + 1;
q.push(b);
}
}
}
bool valid = 1;
for (int i = 1; i <= n; ++i) if (dis[i] == 0) valid = 0;
return (valid ? ret : 2e9);
}
void solve() {
int n; cin >> n;
for (int i = 1 ; i <= n; ++i) {
int k, u; cin >> k;
for (int j = 1; j <= k; ++j) {
cin >> u; adj[u].pb(i);
}
}
int ans = 2e9;
for (int i = 1; i <= n; ++i) {
memset(dis, 0, sizeof(dis));
ckmin(ans, check(i, n));
}
cout << ans << nl;
}
int main(int argc, char* argv[]) {
ios_base::sync_with_stdio(0); cin.tie(NULL);
int t = 1;
// cin >> t;
while (t--) { solve(); }
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
bosses.cpp:1:9: warning: #pragma once in main file
1 | #pragma once
| ^~~~
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