oj.uz

답안 #624421

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
624421 2022-08-08T08:50:55 Z iomoon191 Meetings 2 (JOI21_meetings2) C++17
100 / 100
 602 ms 67880 KB 
#include <bits/stdc++.h>
using ll = long long;
#define int ll
using namespace std;

#define sz(x) (int)(x).size()
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, l, r) for(int i = l; i >= r; i--)
#define fi first
#define se second
#define mod 998244353

#define db(x) cerr << __LINE__ << " " << #x << " " << x << "\n"
using vi = vector<int>;
using pi = pair<int, int>;

const ll N = 200005;
const ll inf = 1e18;

int n, dep[N], par[25][N], sz[N], mz[N], res[N];
vi adj[N], v[N];

void dfs(int u, int p){
	sz[u] = 1;
	mz[u] = 0;
	for(auto &i : adj[u]){
		if(i == p) continue;
		par[0][i] = u;
		dep[i] = dep[u] + 1;
		dfs(i, u);
		sz[u] += sz[i];
		mz[u] = max(mz[u], sz[i]);
	}
}

int center(){
	dfs(1, 0);
	pi res(inf, -inf);
	foru(i, 1, n){
		int ryz = max(n - sz[i], mz[i]);
		res = min(res, pi(ryz, i));
	}
	return res.se;
}

int lca(int x, int y){
	if(dep[x] > dep[y]) swap(x, y);
	int dif = dep[y] - dep[x];
	for(int i = 0; dif; i++, dif >>= 1){
		if(dif & 1) y = par[i][y];
	}
	if(x == y) return x;
	ford(i, 16, 0){
		if(par[i][x] != par[i][y]){
			x = par[i][x];
			y = par[i][y];
		}
	}
	return par[0][x];
}

int dis(int x, int y){
	return dep[x] - dep[lca(x, y)] + dep[y] - dep[lca(x, y)];
}

void solve(){
	cin >> n;
	foru(i, 1, n - 1){
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	int cen = center();
	dfs(cen, -1);
	foru(i, 1, 20){
		foru(j, 1, n){
			par[i][j] = par[i - 1][par[i - 1][j]];
		}
	}
	foru(i, 1, n){
		if(i == cen) continue;
		v[sz[i]].push_back(i);
	}
	pi cur(cen, cen);
	ford(i, n >> 1, 0){
		for(auto &i : v[i]){
			int f = cur.fi;
			int s = cur.se;
			cur = max(cur, pi(f, i), [&](pi a, pi b){
				return dis(a.fi, a.se) < dis(b.fi, b.se);
			});
			cur = max(cur, pi(s, i), [&](pi a, pi b){
				return dis(a.fi, a.se) < dis(b.fi, b.se);
			});
		}
		res[i << 1] = dis(cur.fi, cur.se);
	}
	foru(i, 1, n) cout << res[i] + 1 << "\n";
}

signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	int t = 1; // cin >> t;
	while(t--){
		solve();
	}
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9812 KB Output is correct
2 Correct 5 ms 9824 KB Output is correct
3 Correct 5 ms 9824 KB Output is correct
4 Correct 5 ms 9812 KB Output is correct
5 Correct 5 ms 9812 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9812 KB Output is correct
8 Correct 5 ms 9812 KB Output is correct
9 Correct 5 ms 9812 KB Output is correct
10 Correct 5 ms 9856 KB Output is correct
11 Correct 5 ms 9800 KB Output is correct
12 Correct 5 ms 9840 KB Output is correct
13 Correct 5 ms 9804 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 6 ms 9812 KB Output is correct
16 Correct 5 ms 9896 KB Output is correct
17 Correct 5 ms 9812 KB Output is correct
18 Correct 5 ms 9812 KB Output is correct
19 Correct 5 ms 9812 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 5 ms 9812 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9812 KB Output is correct
2 Correct 5 ms 9824 KB Output is correct
3 Correct 5 ms 9824 KB Output is correct
4 Correct 5 ms 9812 KB Output is correct
5 Correct 5 ms 9812 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9812 KB Output is correct
8 Correct 5 ms 9812 KB Output is correct
9 Correct 5 ms 9812 KB Output is correct
10 Correct 5 ms 9856 KB Output is correct
11 Correct 5 ms 9800 KB Output is correct
12 Correct 5 ms 9840 KB Output is correct
13 Correct 5 ms 9804 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 6 ms 9812 KB Output is correct
16 Correct 5 ms 9896 KB Output is correct
17 Correct 5 ms 9812 KB Output is correct
18 Correct 5 ms 9812 KB Output is correct
19 Correct 5 ms 9812 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 5 ms 9812 KB Output is correct
22 Correct 8 ms 10836 KB Output is correct
23 Correct 9 ms 10836 KB Output is correct
24 Correct 8 ms 10836 KB Output is correct
25 Correct 8 ms 10836 KB Output is correct
26 Correct 11 ms 10836 KB Output is correct
27 Correct 8 ms 10864 KB Output is correct
28 Correct 8 ms 10836 KB Output is correct
29 Correct 8 ms 10836 KB Output is correct
30 Correct 8 ms 10816 KB Output is correct
31 Correct 8 ms 10812 KB Output is correct
32 Correct 9 ms 10964 KB Output is correct
33 Correct 8 ms 10964 KB Output is correct
34 Correct 7 ms 10880 KB Output is correct
35 Correct 8 ms 10836 KB Output is correct
36 Correct 8 ms 10880 KB Output is correct
37 Correct 8 ms 10836 KB Output is correct
38 Correct 8 ms 10836 KB Output is correct

Subtask #3
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9812 KB Output is correct
2 Correct 5 ms 9824 KB Output is correct
3 Correct 5 ms 9824 KB Output is correct
4 Correct 5 ms 9812 KB Output is correct
5 Correct 5 ms 9812 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9812 KB Output is correct
8 Correct 5 ms 9812 KB Output is correct
9 Correct 5 ms 9812 KB Output is correct
10 Correct 5 ms 9856 KB Output is correct
11 Correct 5 ms 9800 KB Output is correct
12 Correct 5 ms 9840 KB Output is correct
13 Correct 5 ms 9804 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 6 ms 9812 KB Output is correct
16 Correct 5 ms 9896 KB Output is correct
17 Correct 5 ms 9812 KB Output is correct
18 Correct 5 ms 9812 KB Output is correct
19 Correct 5 ms 9812 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 5 ms 9812 KB Output is correct
22 Correct 8 ms 10836 KB Output is correct
23 Correct 9 ms 10836 KB Output is correct
24 Correct 8 ms 10836 KB Output is correct
25 Correct 8 ms 10836 KB Output is correct
26 Correct 11 ms 10836 KB Output is correct
27 Correct 8 ms 10864 KB Output is correct
28 Correct 8 ms 10836 KB Output is correct
29 Correct 8 ms 10836 KB Output is correct
30 Correct 8 ms 10816 KB Output is correct
31 Correct 8 ms 10812 KB Output is correct
32 Correct 9 ms 10964 KB Output is correct
33 Correct 8 ms 10964 KB Output is correct
34 Correct 7 ms 10880 KB Output is correct
35 Correct 8 ms 10836 KB Output is correct
36 Correct 8 ms 10880 KB Output is correct
37 Correct 8 ms 10836 KB Output is correct
38 Correct 8 ms 10836 KB Output is correct
39 Correct 327 ms 57844 KB Output is correct
40 Correct 325 ms 56656 KB Output is correct
41 Correct 317 ms 58100 KB Output is correct
42 Correct 348 ms 58780 KB Output is correct
43 Correct 315 ms 58748 KB Output is correct
44 Correct 330 ms 58996 KB Output is correct
45 Correct 602 ms 64640 KB Output is correct
46 Correct 323 ms 67880 KB Output is correct
47 Correct 219 ms 58764 KB Output is correct
48 Correct 136 ms 58760 KB Output is correct
49 Correct 459 ms 59068 KB Output is correct
50 Correct 185 ms 58780 KB Output is correct
51 Correct 239 ms 66788 KB Output is correct