oj.uz

Submission #523336

# Submission time Handle Problem Language Result Execution time Memory
523336 2022-02-07T13:27:21 Z amunduzbaev Meetings 2 (JOI21_meetings2) C++17
100 / 100
 389 ms 49976 KB 
#include "bits/stdc++.h"
using namespace std;
 
#define ar array
 
const int N = 2e5 + 5;
vector<int> edges[N], cnt[N];
int sub[N], par[N][20], d[N];
int tin[N], tout[N], t;

void dfs(int u, int& C, int n, int p = -1){
	tin[u] = ++t, sub[u] = 1;
	for(int i=1;i<20;i++) par[u][i] = par[par[u][i-1]][i-1];
	for(auto x : edges[u]){
		if(x == p) continue;
		d[x] = d[u] + 1;
		par[x][0] = u;
		dfs(x, C, n, u);
		sub[u] += sub[x];
	}
	if(sub[u] > n / 2 && C == -1) C = u;
	tout[u] = t;
}

bool is(int a, int b){ return (tin[a] <= tin[b] && tout[b] <= tout[a]); }

int dis(int a, int b){
	//~ cout<<a<<" "<<b<<endl;
	if(is(a, b)) return d[b] - d[a];
	if(is(b, a)) return d[a] - d[b];
	int D = d[a] + d[b];
	for(int j=19;~j;j--){
		if(!is(par[a][j], b)) a = par[a][j];
	} a = par[a][0];
	return D - d[a] * 2;
}

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n; cin>>n;
	for(int i=1;i<n;i++){
		int a, b; cin>>a>>b;
		edges[a].push_back(b);
		edges[b].push_back(a);
	}
	
	int C = -1;
	par[1][0] = 1;
	dfs(1, C, n);
	
	vector<int> rr(n + 1);
	int a = C, b = C, d = 0;
	//~ cout<<C<<endl;
	par[C][0] = C;
	dfs(C, C, n);
	for(int i=1;i<=n;i++){
		cnt[sub[i]].push_back(i);
	}
	
	for(int i=n/2;i>0;i--){
		for(auto x : cnt[i]){
			//~ cout<<x<<" "<<a<<" "<<b<<" "<<d<<endl;;
			int da = dis(a, x), db = dis(b, x);
			if(da < db) swap(da, db), swap(a, b);
			if(da > d){
				assert(da == d + 1);
				d = da, b = x;
			} else if(db > d){
				assert(db == d + 1);
				d = db, a = x;
			}
		}
		
		rr[i] = d + 1;
	}
	
	for(int i=1;i<=n;i++){
		if(i&1) cout<<1<<"\n";
		else cout<<rr[i/2]<<"\n";
	}
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 4 ms 9676 KB Output is correct
4 Correct 4 ms 9676 KB Output is correct
5 Correct 5 ms 9660 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9680 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9648 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9676 KB Output is correct
12 Correct 5 ms 9676 KB Output is correct
13 Correct 5 ms 9676 KB Output is correct
14 Correct 5 ms 9620 KB Output is correct
15 Correct 4 ms 9676 KB Output is correct
16 Correct 5 ms 9728 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9676 KB Output is correct
20 Correct 5 ms 9656 KB Output is correct
21 Correct 6 ms 9676 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 4 ms 9676 KB Output is correct
4 Correct 4 ms 9676 KB Output is correct
5 Correct 5 ms 9660 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9680 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9648 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9676 KB Output is correct
12 Correct 5 ms 9676 KB Output is correct
13 Correct 5 ms 9676 KB Output is correct
14 Correct 5 ms 9620 KB Output is correct
15 Correct 4 ms 9676 KB Output is correct
16 Correct 5 ms 9728 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9676 KB Output is correct
20 Correct 5 ms 9656 KB Output is correct
21 Correct 6 ms 9676 KB Output is correct
22 Correct 8 ms 10188 KB Output is correct
23 Correct 8 ms 10188 KB Output is correct
24 Correct 8 ms 10188 KB Output is correct
25 Correct 8 ms 10276 KB Output is correct
26 Correct 7 ms 10272 KB Output is correct
27 Correct 8 ms 10188 KB Output is correct
28 Correct 9 ms 10316 KB Output is correct
29 Correct 8 ms 10240 KB Output is correct
30 Correct 8 ms 10188 KB Output is correct
31 Correct 8 ms 10188 KB Output is correct
32 Correct 9 ms 10444 KB Output is correct
33 Correct 8 ms 10572 KB Output is correct
34 Correct 8 ms 10304 KB Output is correct
35 Correct 8 ms 10300 KB Output is correct
36 Correct 9 ms 10316 KB Output is correct
37 Correct 7 ms 10188 KB Output is correct
38 Correct 8 ms 10316 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 4 ms 9676 KB Output is correct
4 Correct 4 ms 9676 KB Output is correct
5 Correct 5 ms 9660 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9680 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9648 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9676 KB Output is correct
12 Correct 5 ms 9676 KB Output is correct
13 Correct 5 ms 9676 KB Output is correct
14 Correct 5 ms 9620 KB Output is correct
15 Correct 4 ms 9676 KB Output is correct
16 Correct 5 ms 9728 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9676 KB Output is correct
20 Correct 5 ms 9656 KB Output is correct
21 Correct 6 ms 9676 KB Output is correct
22 Correct 8 ms 10188 KB Output is correct
23 Correct 8 ms 10188 KB Output is correct
24 Correct 8 ms 10188 KB Output is correct
25 Correct 8 ms 10276 KB Output is correct
26 Correct 7 ms 10272 KB Output is correct
27 Correct 8 ms 10188 KB Output is correct
28 Correct 9 ms 10316 KB Output is correct
29 Correct 8 ms 10240 KB Output is correct
30 Correct 8 ms 10188 KB Output is correct
31 Correct 8 ms 10188 KB Output is correct
32 Correct 9 ms 10444 KB Output is correct
33 Correct 8 ms 10572 KB Output is correct
34 Correct 8 ms 10304 KB Output is correct
35 Correct 8 ms 10300 KB Output is correct
36 Correct 9 ms 10316 KB Output is correct
37 Correct 7 ms 10188 KB Output is correct
38 Correct 8 ms 10316 KB Output is correct
39 Correct 273 ms 36792 KB Output is correct
40 Correct 270 ms 35876 KB Output is correct
41 Correct 261 ms 36768 KB Output is correct
42 Correct 284 ms 37180 KB Output is correct
43 Correct 300 ms 37088 KB Output is correct
44 Correct 283 ms 37336 KB Output is correct
45 Correct 389 ms 44724 KB Output is correct
46 Correct 351 ms 49976 KB Output is correct
47 Correct 226 ms 37672 KB Output is correct
48 Correct 194 ms 37816 KB Output is correct
49 Correct 267 ms 37900 KB Output is correct
50 Correct 199 ms 37564 KB Output is correct
51 Correct 259 ms 47556 KB Output is correct