184302025-10-22 15:35:39ubormaciHírlánccpp17Accepted 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;
}
SubtaskSumTestVerdictTimeMemory
subtask10/0
1Accepted1ms316 KiB
subtask220/20
2Accepted2ms564 KiB
3Accepted2ms748 KiB
4Accepted2ms568 KiB
5Accepted2ms564 KiB
6Accepted2ms564 KiB
7Accepted2ms572 KiB
8Accepted2ms564 KiB
9Accepted2ms628 KiB
10Accepted2ms564 KiB
11Accepted2ms564 KiB
12Accepted2ms564 KiB
subtask318/18
13Accepted243ms26024 KiB
14Accepted243ms26136 KiB
15Accepted180ms26476 KiB
16Accepted182ms27028 KiB
17Accepted252ms30116 KiB
18Accepted186ms30884 KiB
19Accepted259ms30884 KiB
20Accepted190ms30844 KiB
21Accepted254ms38304 KiB
22Accepted192ms41124 KiB
subtask442/42
23Accepted1ms316 KiB
24Accepted2ms564 KiB
25Accepted2ms748 KiB
26Accepted2ms568 KiB
27Accepted2ms564 KiB
28Accepted2ms564 KiB
29Accepted2ms572 KiB
30Accepted2ms564 KiB
31Accepted2ms628 KiB
32Accepted2ms564 KiB
33Accepted2ms564 KiB
34Accepted2ms564 KiB
35Accepted243ms26024 KiB
36Accepted243ms26136 KiB
37Accepted180ms26476 KiB
38Accepted182ms27028 KiB
39Accepted252ms30116 KiB
40Accepted186ms30884 KiB
41Accepted259ms30884 KiB
42Accepted190ms30844 KiB
43Accepted254ms38304 KiB
44Accepted192ms41124 KiB
45Accepted246ms30884 KiB
46Accepted246ms31524 KiB
47Accepted196ms31512 KiB
48Accepted194ms31860 KiB
49Accepted259ms32548 KiB
50Accepted257ms33572 KiB
51Accepted202ms34084 KiB
52Accepted277ms34328 KiB
53Accepted252ms34848 KiB
54Accepted246ms36536 KiB