Submission #107392

#	Time	Username	Problem	Language	Result	Execution time	Memory
107392		aryaman	Bosses (BOI16_bosses)	C++14	0 / 100	3 ms	384 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;

typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<ld> vd;
typedef vector<ll> vl;

typedef set<int> si;
typedef set<ii> sii;
typedef set<ld> sd;
typedef set<ll> sl;

typedef map<int, int> mii;
typedef priority_queue<int> pqi;
typedef queue<int> qi;
 
#define mp make_pair
#define pb push_back
#define f first
#define s second

mt19937 rng((int) std::chrono::steady_clock::now().time_since_epoch().count());

void dfs(int u, vl &cost, vector<bool> &vis, vector<vi> &g) {
    vis[u] = true;
    ll sum = 0;
    for (auto &v : g[u]) {
        if (vis[v]) continue;
        dfs(v, cost, vis, g);
        sum += cost[v];
    }
    cost[u] = sum + 1;
}

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

    int n;
    cin >> n;
    vector<vi> g(n);
    for (int i = 0; i < n; i++) {
        int m; cin >> m;
        while (m--) {
            int j; cin >> j, j--;
            g[j].push_back(i);
        }
    }

    ll ans = numeric_limits<ll>::max();
    vl cost(n); vector<bool> vis(n, false);
    for (int i = 0; i < n; i++) {
        dfs(i, cost, vis, g);
        ll res = 0;
        for (auto &x : cost) res += x;
        ans = min(ans, res);
        fill(vis.begin(), vis.end(), false);
    }

    cout << ans << endl;
}

/*
USE LONG LONG!!!!

1 1 2 4
1 2 2 3
2 2 2 2

:pray: :fishy15:
:pray: :summitosity:
:pray: :prodakcin:

          .=     ,        =.
  _  _   /'/    )\,/,/(_   \ \
   `//-.|  (  ,\\)\//\)\/_  ) |
   //___\   `\\\/\\/\/\\///'  /
,-"~`-._ `"--'_   `"""`  _ \`'"~-,_
\       `-.  '_`.      .'_` \ ,-"~`/
 `.__.-'`/   (-\        /-) |-.__,'
   ||   |     \O)  /^\ (O/  | .        <-  BESSIE THE COW
   `\\  |         /   `\    /
     \\  \       /      `\ /
      `\\ `-.  /' .---.--.\
        `\\/`~(, '()      ('
         /(O) \\   _,.-.,_)    
        //  \\ `\'`      /
       / |  ||   `""""~"`
     /'  |__||
           `o
*/

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