Submission #373924

#	Time	Username	Problem	Language	Result	Execution time	Memory
373924		Aryan_Raina	Bosses (BOI16_bosses)	C++14	100 / 100	744 ms	876 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define ld long double
#define ar array

const int INF = 1e15;
const int MOD = 1e9+7;

const int MXN = 5005;

vector<int> g[MXN];
int n;

int bfs(int rt) {
    vector<int> d(n, -1);
    queue<int> q;
    q.push(rt);
    d[rt] = 1;
    while (!q.empty()) {
        int u = q.front();
        q.pop();
        for (int v : g[u]) if (d[v] == -1) {
            d[v] = d[u]+1;
            q.push(v);
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (d[i] == -1) return INF;
        ans += d[i];
    }
    return ans;
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    for (int i = 0; i < n; i++) {
        int x; cin>>x;
        while (x--) {
            int j; cin>>j; --j;
            g[j].push_back(i);
        }
    }
    int ans = INF;
    for (int i = 0; i < n; i++) ans = min(ans, bfs(i));
    cout<<ans<<"\n";
}

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