Submission #546738

#	Time	Username	Problem	Language	Result	Execution time	Memory
546738		Jomnoi	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	440 KiB

bosses

#include <bits/stdc++.h>
#define DEBUG 0
using namespace std;

const int MAX_N = 5e3 + 10;
const int INF = 1e9 + 7;

int sum;
vector <int> adj[MAX_N];
bitset <MAX_N> visited;

int dfs(int u) {
    int res = 0;
    for(auto v : adj[u]) {
        if(visited[v] == false) {
            visited[v] = true;
            res += dfs(v);
        }
    }
    res++;
    sum += res;
    return res;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++) {
        int k;
        cin >> k;
        while(k--) {
            int p;
            cin >> p;
            adj[p].push_back(i);
        }
    }

    int ans = INF;
    for(int i = 1; i <= n; i++) {
        visited = 0;
        sum = 0;
        visited[i] = true;

        dfs(i);
        if(visited.count() == n) {
            ans = min(ans, sum);
        }
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:46:28: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   46 |         if(visited.count() == n) {
      |            ~~~~~~~~~~~~~~~~^~~~

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