Submission #1052833

#	Time	Username	Problem	Language	Result	Execution time	Memory
1052833		caterpillow	Bosses (BOI16_bosses)	C++17	100 / 100	1334 ms	1112 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

using db = long double;
using ll = long long;
using pl = pair<ll, ll>;
using pi = pair<int, int>;
#define vt vector
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(), x.end() 
#define size(x) ((int) (x).size())
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define F0R(i, b) FOR (i, 0, b)
#define endl '\n'
const ll INF = 1e18;
const int inf = 1e9;

template<typename... Args> // tuples
ostream& operator<<(ostream& os, tuple<Args...> t) { 
    apply([&](Args... args) { string dlm = "{"; ((os << dlm << args, dlm = ", "), ...); }, t);
    return os << "}";
}

template<typename T, typename V> // pairs
ostream& operator<<(ostream& os, pair<T, V> p) { return os << "{" << p.f << ", " << p.s << "}"; }

template<class T, class = decltype(begin(declval<T>()))> // iterables
typename enable_if<!is_same<T, string>::value, ostream&>::type operator<<(ostream& os, const T& v) {
    string dlm = "{";
    for (auto& i : v) os << dlm << i, dlm = ", ";
    return os << "}";  
}

template <typename T, typename... V>
void printer(string pfx, const char *names, T&& head, V&& ...tail) {
    int i = 0;
    while (names[i] && names[i] != ',') i++;
    constexpr bool is_str = is_same_v<decay_t<T>, const char*>;
    if (is_str) cerr << " " << head;
    else cerr << pfx, cerr.write(names, i) << " = " << head; 
    if constexpr (sizeof...(tail)) printer(is_str ? "" : ",", names + i + 1, tail...);
    else cerr << endl;
}

#ifdef LOCAL
#define dbg(...) printer(to_string(__LINE__) + ": ", #__VA_ARGS__, __VA_ARGS__)
#else
#define dbg(x...)
#define cerr if (0) std::cerr
#endif

int n;
vt<vt<int>> adj;

main() {
    cin.tie(0)->sync_with_stdio(0);
    
    cin >> n;
    adj.resize(n);
    F0R (u, n) {
        int m; cin >> m;
        F0R (i, m) {
            int v; cin >> v; v--;
            adj[v].pb(u);
        }
    }

    ll best = INF;
    F0R (i, n) {
        list<pi> q {{i, 1}};
        vt<ll> dist(n, inf);
        for (auto [u, d] : q) {
            if (dist[u] <= d) continue;
            dist[u] = d;
            for (int v : adj[u]) q.pb({v, d + 1});
        }   
        best = min(best, accumulate(all(dist), 0ll));
    }
    cout << best << endl;
}

Compilation message (stderr)

bosses.cpp:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main() {
      | ^~~~

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