Submission #1289166

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289166		thieunguyenhuy	Meetings 2 (JOI21_meetings2)	C++20	4 / 100	4091 ms	908 KiB

meetings2

#include <bits/stdc++.h>
using namespace std;

#define POPCOUNT(n) (__builtin_popcountll((n)))
#define CLZ(n) (__builtin_clzll((n)))
#define CTZ(n) (__builtin_ctzll((n)))
#define LOG(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))

#define Int __int128
#define fi first
#define se second

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef vector<pair<int, int>> vii;
typedef vector<pair<long long, long long>> vll;
typedef vector<pair<long long, int>> vli;
typedef vector<pair<int, long long>> vil;

template <class T1, class T2> bool maximize(T1 &x, T2 y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <class T1, class T2> bool minimize(T1 &x, T2 y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template <class T> void remove_duplicate(vector<T> &ve) {
    sort (ve.begin(), ve.end());
    ve.resize(unique(ve.begin(), ve.end()) - ve.begin());
}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
long long random(long long l, long long r) {
    return uniform_int_distribution<long long>(l, r)(rng);
}
unsigned long long random(unsigned long long l, unsigned long long r) {
    return uniform_int_distribution<unsigned long long>(l, r)(rng);
}
template <class T> T random(T r) {
    return rng() % r;
}

const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;

int n;
int ans[N], sz[N], par[N];
vector<int> adj[N];

void dfs(int u, int fa) {
	sz[u] = 1;
	for (auto v : adj[u]) if (v != fa) {
		par[v] = u, dfs(v, u);
		sz[u] += sz[v];
	}
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    cin >> n;

    for (int i = 1; i < n; ++i) {
    	int u, v; cin >> u >> v;
    	adj[u].emplace_back(v), adj[v].emplace_back(u);
    }

    for (int k = 1; k <= n; ++k) ans[k] = 1;
    for (int root = 1; root <= n; ++root) {
		dfs(root, -1);
		for (int u = 1; u <= n; ++u) if (u != root) {
			int tmp = u, pathLen = 1;
			while (par[tmp] != root) ++pathLen, tmp = par[tmp];
			maximize(ans[min(sz[u], n - sz[tmp]) * 2], pathLen + 1);
		}
	}

    for (int k = n - n % 2; k > 0; k -= 2) {
    	maximize(ans[k], ans[k + 2]);
    }

    for (int k = 1; k <= n; ++k) cout << ans[k] << '\n';
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 0 / 16
• Subtask 3: 0 / 80