Submission #1352820

#	Time	Username	Problem	Language	Result	Execution time	Memory
1352820		luvwinter	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	344 KiB

bosses

#include<bits/stdc++.h>

using namespace std;
#define int long long
#define pii pair<int , int>
#define fi first
#define se second
#define FOR(i , l , r) for(int i = (l) ; i <= (r) ; i++)
#define FOD(i , r , l) for(int i = (r) ; i >= (l) ; i--)
const int N = 5005;
const int INF = 1e18;
vector<int> adj[N];
int n;
int res = INF;
void bfs(int s) {
    vector<int> dist(n + 1 , INF);
    vector<int> check(n + 1 , false);
    dist[s] = 1;
    check[s] = 1;
    queue<int> q;
    q.push(s);
    while(q.size()) {
        int u = q.front();
        q.pop();
        if(check[u]) continue;
        check[u] = 1;
        for(auto v : adj[u]) {
            if(dist[v] > dist[u] + 1) {
                dist[v] = dist[u] + 1;
                q.push(v);
            }
        }

    }

    int ans = 0;
    for(int i = 1 ; i <= n ; i++) {
        ans += dist[i];
    }
    res = min(res , ans);


}


void solve () {
     cin >> n;
     FOR(i , 1 , n) {
          int k; cin >> k;
          FOR(j , 1 , k) {
              int u; cin >> u;
              adj[u].push_back(i);
          }

     }
     FOR(i , 1 , n) {
         bfs(i);
     }
     cout << res;

}


main() {
    ios_base :: sync_with_stdio(false);
    cin.tie(NULL);

    solve();

    return 0;

}

Compilation message (stderr)

bosses.cpp:64:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   64 | main() {
      | ^~~~

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