Submission #736981

#	Time	Username	Problem	Language	Result	Execution time	Memory
736981		Vanilla	Bosses (BOI16_bosses)	C++17	100 / 100	636 ms	664 KiB

bosses

#include <bits/stdc++.h>
#include <fstream>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
struct custom_hash {static uint64_t splitmix64(uint64_t x) {x += 0x9e3779b97f4a7c15;x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;x = (x ^ (x >> 27)) * 0x94d049bb133111eb;return x ^ (x >> 31);}size_t operator()(uint64_t x) const {static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();return splitmix64(x + FIXED_RANDOM);}};
// string __fname = ""; ifstream in (__fname + ".in"); ofstream out (__fname + ".out"); 
// #define cin in 
// #define cout out
#define int64 long long
#define uint64 unsigned long long
#define x first
#define y second
#define pb push_back
#define pii pair <int, int> 
#define pii64 pair <int64, int64>
#define db(x) cout << "> " << #x << ": " << (x) << "\n"
#define qr queries()
#define yn(x) if (x) {ctn("Yes");}else {ctn("No");}
void solve(int);
void queries(){int n;cin >> n;for (int i = 1; i <= n; i++) solve(i);}
template<class T>T ceildiv(T a, T b) {return a / b + !!(a % b);}
template<class T>T gcd (T a, T b){return (b ? gcd(b, a % b): a);}
template<class T>T lcm (T a, T b){return a * b / gcd(a, b);}
// // // // // // // // // // // // // // // // // // // // // // 
/*                  TEMPLATE - VANILLA                         */
// // // // // // // // // // // // // // // // // // // // // //
const int ddx[] = {-1, -1, 0, 1, 1, 1, 0, -1};
const int ddy[] = {0, 1, 1, 1, 0, -1, -1, -1};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
const double pi = 3.14159265359;
const double eps = 1e-6;
const int64 hash_inv = 940594066;
const int64 hash_p = 101;
const int64 mod = 1e9 + 7;
const int maxn = 5003;
vector <int> ad [maxn];
int n;

void solve(int id){
    
    return;
}

int tryroot (int root) {
    vector <int> used (maxn + 1);
    queue <int> q;
    int rs = 0, ct = 0;
    used[root] = 1;
    q.push(root);
    while (!q.empty()) {
        int u = q.front();
        rs+=used[u];
        ct++;
        q.pop();
        for (int v: ad[u]) {
            if (!used[v]) {
                used[v] = used[u] + 1;
                q.push(v);
            }
        }
    }
    if (ct != n) return 1e9;
    return rs;

}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed; cout << setprecision(10); 
    cin >> n;
    int mn = 1e9;
    for (int i = 0; i < n; i++){
        int x;
        cin >> x;
        for (int j = 0; j < x; j++) {
            int y;
            cin >> y;
            ad[y].push_back(i + 1);
        }
    }
    for (int i = 1; i <= n; i++){
        mn = min(mn, tryroot(i));
    }
    cout << mn;
    return 0;
}

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