184302025-10-22 15:35:39ubormaciHírlánccpp17Elfogadva 80/80277ms41124 KiB
#include <iostream>
#include <algorithm> // for sort, mainly
#include <vector>
#include <map>
#include <set>
#include <cmath>
#include <array>
#include <string>
#include <cstdio>
#include <iterator>
#include <unordered_set>
#include <cstdint> // for int64_t, int32_t, etc
#include <queue>
#include <stack>
#include <deque>
#include <numeric> // gcd, lcm
#include <fstream>
#include <bitset> // for bitset
#include <iomanip>
#include <cassert> // for set with custom ordering
#include <type_traits> // for set with custom ordering
#include <utility> // for swap, forward, etc
using namespace std;

#pragma GCC optimize("O2")
// #pragma GCC optimize("O1","O2","O3","Ofast","unroll-loops")
// #pragma GCC target("sse","sse2","sse3","sse4.1","sse4.2","avx","avx2","fma")

template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
void dbg_out() { cout << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cout << ' ' << H; dbg_out(T...); }
#ifdef LOCAL
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

/*

notes:

int64_t
stoi(string s) -> string to int
to_string() -> int (or else) to string

vector declaration:
vector<ll> v(n, 0)
vector<vector<ll>> v(n, vector<ll>(n, 0));

{if statement} ? {truth value} : {false value}

#ifdef LOCAL
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
#endif

std::lcm(ll a, ll b), std::gcd(int a, int b)

cout << fixed << setprecision(n);

set with custom ordering
set<ll, decltype(&cmp)> qu(cmp);

*/

typedef int64_t ll;

vector<vector<ll>> out;
vector<vector<ll>> into;

vector<ll> ord;
vector<ll> comp;
vector<ll> compsize;

void dfs_out(ll curr, vector<bool> &vis) {

    for(const auto & o : out[curr]) {
        if(vis[o] == false) {
            vis[o] = true;
            dfs_out(o, vis);
        }
    }

    ord.push_back(curr);
}

void dfs_into(ll curr, vector<bool> &vis, ll currcomp) {

    for(const auto & o : into[curr]) {
        if(vis[o] == false) {
            vis[o] = true;
            dfs_into(o, vis, currcomp);
        }
    }

    comp[curr] = currcomp;
    compsize[currcomp]++;

}

void solve() {

	ll n;
	cin >> n;
	out.resize(n+1);
    into.resize(n+1);

    comp.resize(n+1, -1);

	for(ll i = 1; i <= n; i++) {
		ll where;
		cin >> where;
		out[i].push_back(where);
        into[where].push_back(i);
	}

    //cerr << "\nread in";

    vector<bool> b(n+1, false);

	for(ll i = 1; i <= n; i++) {
		if(b[i] == false) {
			b[i] = true;
			dfs_out(i, b);
		}
	}

    reverse(ord.begin(), ord.end());

    //cerr << "\ndfs out, ord=" << ord;

    b.clear();
	b.resize(n+1, false);

    ll c = 0;
    for(const auto & x : ord) {
        if(b[x] == false) {
            compsize.push_back(0);
            b[x] = true;
            dfs_into(x, b, c);
            c++;
        }
    }

    //cerr << "\ncomp-ed, comps=" << comp;
    //cerr << "\ncompsize=" << compsize;

    // basszam meg
    // ezt is tulkomplikaltam bazdmeg tudom
    // de hulye vagyok es nem jovok ra az egyszeru megoldasra
    // szoval nesze, SCC

    vector<vector<ll>> int2(c);
    vector<ll> oc(c, 0);
    for(ll i = 1; i <= n; i++) {
        
        ll from = i;
        ll to = out[i][0];

        if(comp[to] != comp[from]) {
            int2[comp[to]].push_back(comp[from]);
            oc[comp[from]]++;
        }
    }

    queue<ll> q;

    for(ll i = 0; i < c; i++) {
        if(oc[i] == 0) {
            q.push(i);
        }
    }

    while(!q.empty()) {
        ll curr = q.front();
        q.pop();

        for(const auto & bck : int2[curr]) {
            compsize[bck] += compsize[curr];
            q.push(bck);
        }
    }

	ll mx = 0;
    ll mcomp = 0;
    for(ll i = 0; i < c; i++) {
        if(compsize[i] > mx) {
            mx = compsize[i];
            mcomp = i;
        }
    }

    ll node = 0;
    for(ll i = 1; i <= n; i++) {
        if(comp[i] == mcomp) {
            node = i;
            break;
        }
    }

    cout << node << " " << mx;

}

int main()
{
	std::ios_base::sync_with_stdio(false);
	//cin.tie(nullptr);
	//cout.tie(nullptr);

	solve();

	return 0;
}
RészfeladatÖsszpontTesztVerdiktIdőMemória
subtask10/0
1Elfogadva1ms316 KiB
subtask220/20
2Elfogadva2ms564 KiB
3Elfogadva2ms748 KiB
4Elfogadva2ms568 KiB
5Elfogadva2ms564 KiB
6Elfogadva2ms564 KiB
7Elfogadva2ms572 KiB
8Elfogadva2ms564 KiB
9Elfogadva2ms628 KiB
10Elfogadva2ms564 KiB
11Elfogadva2ms564 KiB
12Elfogadva2ms564 KiB
subtask318/18
13Elfogadva243ms26024 KiB
14Elfogadva243ms26136 KiB
15Elfogadva180ms26476 KiB
16Elfogadva182ms27028 KiB
17Elfogadva252ms30116 KiB
18Elfogadva186ms30884 KiB
19Elfogadva259ms30884 KiB
20Elfogadva190ms30844 KiB
21Elfogadva254ms38304 KiB
22Elfogadva192ms41124 KiB
subtask442/42
23Elfogadva1ms316 KiB
24Elfogadva2ms564 KiB
25Elfogadva2ms748 KiB
26Elfogadva2ms568 KiB
27Elfogadva2ms564 KiB
28Elfogadva2ms564 KiB
29Elfogadva2ms572 KiB
30Elfogadva2ms564 KiB
31Elfogadva2ms628 KiB
32Elfogadva2ms564 KiB
33Elfogadva2ms564 KiB
34Elfogadva2ms564 KiB
35Elfogadva243ms26024 KiB
36Elfogadva243ms26136 KiB
37Elfogadva180ms26476 KiB
38Elfogadva182ms27028 KiB
39Elfogadva252ms30116 KiB
40Elfogadva186ms30884 KiB
41Elfogadva259ms30884 KiB
42Elfogadva190ms30844 KiB
43Elfogadva254ms38304 KiB
44Elfogadva192ms41124 KiB
45Elfogadva246ms30884 KiB
46Elfogadva246ms31524 KiB
47Elfogadva196ms31512 KiB
48Elfogadva194ms31860 KiB
49Elfogadva259ms32548 KiB
50Elfogadva257ms33572 KiB
51Elfogadva202ms34084 KiB
52Elfogadva277ms34328 KiB
53Elfogadva252ms34848 KiB
54Elfogadva246ms36536 KiB