Submission #659368

#	Time	Username	Problem	Language	Result	Execution time	Memory
659368		ssense	Bosses (BOI16_bosses)	C++14	100 / 100	678 ms	824 KiB

bosses

#include <bits/stdc++.h>
#define startt ios_base::sync_with_stdio(false);cin.tie(0);
typedef long long  ll;
using namespace std;
#define vint vector<int>
#define all(v) v.begin(), v.end()
#define MOD 1000000007
#define MOD2 998244353
#define MX 1000000000
#define MXL 1000000000000000000
#define PI (ld)2*acos(0.0)
#define pb push_back
#define sc second
#define fr first
#define int long long
#define endl '\n'
#define ld long double
#define NO cout << "NO" << endl
#define YES cout << "YES" << endl
int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r]-pref[l-1];}};//mesanu
 
void solve()
{
    int n;
    cin >> n;
    //map<int, int> mp;
    vector<vector<int>> a(n, vector<int>());
    //int mx = 0, best = -1;
    for(int i = 0; i < n; i++)
    {
        int k;
        cin >> k;
        for(int j = 0; j < k; j++)
        {
            int boss;
            cin >> boss;
            boss--;
            a[boss].pb(i);
        }
    }
    ll ans = MXL;
    for(int i = 0; i < n; i++)
    {
        int now = 0;
        vector<int> height(n, -1);
        height[i] = 0;
        queue<int> q;
        q.push(i);
        int got = 1;
        while(!q.empty())
        {
            int u = q.front();
            now+=height[u]+1;
            q.pop();
            for(auto v : a[u])
            {
                if(height[v] == -1)
                {
                    q.push(v);
                    got++;
                    height[v] = height[u]+1;
                }
            }
        }
        if(got == n)
        {
            ans = min(ans, now);
        }
    }
    cout << ans << endl;
}
 
int32_t main(){
    startt
    int t = 1;
    //cin >> t;
    while (t--) {
        solve();
    }
}
 
/*
4
1 4
3 1 3 4
2 1 2
1 3
 */
 

Compilation message (stderr)

bosses.cpp: In member function 'void prefix_sum::build(std::vector<long long int>)':
bosses.cpp:20:667: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r]-pref[l-1];}};//mesanu
      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         ~~^~~~~~~~~~

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