제출 #51281

#제출 시각아이디문제언어결과실행 시간메모리
51281mareksomBosses (BOI16_bosses)C++17
100 / 100
702 ms1488 KiB
#ifndef LOCAL #pragma GCC optimize ("O3") #endif #include <bits/stdc++.h> using namespace std; #define sim template < class c #define ris return * this #define dor > debug & operator << #define eni(x) sim > typename \ enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) { sim > struct rge { c b, e; }; sim > rge<c> range(c i, c j) { return {i, j}; } sim > auto dud(c* x) -> decltype(cerr << *x, 0); sim > char dud(...); struct debug { #ifdef LOCAL ~debug() { cerr << endl; } eni(!=) cerr << boolalpha << i; ris; } eni(==) ris << range(begin(i), end(i)); } sim, class b dor(pair < b, c > d) { ris << "(" << d.first << ", " << d.second << ")"; } sim dor(rge<c> d) { *this << "["; for (c it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; ris << "]"; } #else sim dor(const c&) { ris; } #endif }; #define imie(x...) " [" #x ": " << (x) << "] " using ld = long double; using ll = long long; constexpr int mod = 1000 * 1000 * 1000 + 7; constexpr int odw2 = (mod + 1) / 2; void OdejmijOd(int& a, int b) { a -= b; if (a < 0) a += mod; } int Odejmij(int a, int b) { OdejmijOd(a, b); return a; } void DodajDo(int& a, int b) { a += b; if (a >= mod) a -= mod; } int Dodaj(int a, int b) { DodajDo(a, b); return a; } int Mnoz(int a, int b) { return (ll) a * b % mod; } void MnozDo(int& a, int b) { a = Mnoz(a, b); } int Pot(int a, int b) { int res = 1; while (b) { if (b % 2 == 1) MnozDo(res, a); a = Mnoz(a, a); b /= 2; } return res; } int Odw(int a) { return Pot(a, mod - 2); } void PodzielDo(int& a, int b) { MnozDo(a, Odw(b)); } int Podziel(int a, int b) { return Mnoz(a, Odw(b)); } int Moduluj(ll x) { x %= mod; if (x < 0) x += mod; return x; } template <typename T> T Maxi(T& a, T b) { return a = max(a, b); } template <typename T> T Mini(T& a, T b) { return a = min(a, b); } constexpr int nax = 5005; int n; vector<int> graf[nax]; int wynik = nax * nax; int licz; int czas = 100; int odw[nax]; int gleb[nax]; void OgarnijZ(int w) { licz = 0; czas++; queue<int> kol; kol.push(w); gleb[w] = 1; odw[w] = czas; while (!kol.empty()) { w = kol.front(); kol.pop(); licz += gleb[w]; for (int x : graf[w]) { if (odw[x] != czas) { odw[x] = czas; gleb[x] = gleb[w] + 1; kol.push(x); } } } for (int i = 1; i <= n; i++) { if (odw[i] != czas) { return; } } Mini(wynik, licz); } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n; for (int i = 1; i <= n; i++) { int k; cin >> k; while (k--) { int x; cin >> x; graf[x].push_back(i); } } for (int i = 1; i <= n; i++) { OgarnijZ(i); } cout << wynik << endl; return 0; }
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