Submission #374047

#	Time	Username	Problem	Language	Result	Execution time	Memory
374047		ritul_kr_singh	Bosses (BOI16_bosses)	C++17	100 / 100	1453 ms	1132 KiB

bosses

//#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"

vector<vector<int>> g0, g1;
vector<bool> vis;

signed main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n; cin >> n;
    g0.resize(n);
    g1.resize(n);
    vis.resize(n);
    for(int i=0; i<n; ++i){
        int k; cin >> k;
        for(int j=0; j<k; ++j){
            int x; cin >> x;
            g0[x-1].push_back(i);
        }
    }
    int curr[n];
    int ans = 1e18;
    for(int root=0; root<n; ++root){
        for(int i=0; i<n; ++i){
            vis[i] = false;
            g1[i].clear();
            curr[i] = 1;
        }
        vector<int> order;
        order.push_back(root);
        vis[root] = true;
        bool ok = true;
        for(int i=0; i<n; ++i){
            if(i==(int)order.size()){
                ok = false;
                break;
            }
            int u = order[i];
            for(int v : g0[u]){
                if(!vis[v]){
                    vis[v] = true;
                    order.push_back(v);
                    g1[u].push_back(v);
                }
            }
        }
        if(!ok) continue;
        reverse(order.begin(), order.end());
        for(int i : order){
            for(int j : g1[i]){
                curr[i] += curr[j];
            }
        }
        ans = min(ans, accumulate(curr, curr+n, 0LL));
    }
    cout << ans nl;
}

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