oj.uz

답안 #932920

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
932920 2024-02-24T14:19:36 Z ParsaS 수도 (JOI20_capital_city) C++17
41 / 100
 1600 ms 524288 KB 
// In the name of God
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define mp make_pair
typedef long long ll;
const int N = 4e5 + 5, lg = 20;
int n, k;
int up[N][lg], f[N], c[N];
vector<int> adj[N], ver[N];
int h[N], tin[N], tout[N], T;
int par[N];

void dfs(int v, int p) {
	par[v] = p;
	up[v][0] = p;
	for (int i = 1; i < lg; i++)
		up[v][i] = up[up[v][i - 1]][i - 1];
	tin[v] = ++T;
	for (auto u : adj[v]) {
		if (u != p) {
			h[u] = h[v] + 1;
			dfs(u, v);
		}
	}
	tout[v] = T;
}

bool anc(int v, int u) {
	return tin[v] <= tin[u] && tout[v] >= tout[u];
}
int lca(int v, int u) {
	if (tin[v] > tin[u]) swap(v, u);
	if (anc(v, u)) return v;
	for (int i = lg - 1; i >= 0; i--)
		if (!anc(up[u][i], v))
			u = up[u][i];
	return up[u][0];

}
vector<int> out[N], in[N];

void dfs2(int v, int p) {
	int u = par[v];
	while (h[u] > h[f[c[v]]]) {
		out[c[v]].pb(c[u]);
		in[c[u]].pb(c[v]);


		u = par[u];
	}
	par[v] = u;
	if (h[u] >= h[f[c[v]]]) {
		out[c[v]].pb(c[f[c[v]]]);
		in[c[f[c[v]]]].pb(c[v]);


		par[v] = par[f[c[v]]];
	}
	for (auto u : adj[v]) {
		if (u != p)
			dfs2(u, v);
	}
}
bool vis[N];
int col[N];
vector<int> vec;

void dfs3(int v) {
	vis[v] = true;
	for (auto u : out[v]) {
		if (!vis[u]) dfs3(u);
	}
	vec.pb(v);
}
vector<int> V;

void dfs4(int v, int x) {
	col[v] = x;
	for (auto u : in[v]) {
		if (!col[u])
			dfs4(u, x);
	}
	V.pb(v);
}

void solve() {
	cin >> n >> k;
	for (int i = 0; i < n - 1; i++) {
		int v, u; cin >> v >> u;
		adj[v].pb(u);
		adj[u].pb(v);
	}
	for (int i = 1; i <= n; i++) cin >> c[i], ver[c[i]].pb(i);

	dfs(1, 0);
	h[0] = -1;
	tout[0] = T;

	for (int i = 1; i <= k; i++) {
		f[i] = ver[i].back();
		for (auto v : ver[i])
			f[i] = lca(f[i], v);
	}

	dfs2(1, 0);
	for (int i = 1; i <= k; i++) {
		if (!vis[i])
			dfs3(i);
	}
	int ans = n + 1;
	for (int i = k - 1; i >= 0; i--) {
		int w = vec[i];
		if (col[w] == 0) {
			V.clear();
			dfs4(w, w);
			bool ok = true;
			int cnt = V.size();
			for (auto v : V) {
				for (auto u : out[v])
					ok &= col[u] == col[v];
			}
			if (ok) ans = min(ans, cnt);	
		}
	}
	cout << ans - 1 << '\n';

}

int32_t main() {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

	int tc = 1; // cin >> tc;
	while (tc--) {
		solve();
	}

	return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 47452 KB Output is correct
2 Correct 9 ms 47452 KB Output is correct
3 Correct 9 ms 47576 KB Output is correct
4 Correct 9 ms 47660 KB Output is correct
5 Correct 9 ms 47452 KB Output is correct
6 Correct 9 ms 47452 KB Output is correct
7 Correct 10 ms 47452 KB Output is correct
8 Correct 10 ms 47580 KB Output is correct
9 Correct 9 ms 47448 KB Output is correct
10 Correct 10 ms 49496 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 47452 KB Output is correct
2 Correct 9 ms 47452 KB Output is correct
3 Correct 9 ms 47576 KB Output is correct
4 Correct 9 ms 47660 KB Output is correct
5 Correct 9 ms 47452 KB Output is correct
6 Correct 9 ms 47452 KB Output is correct
7 Correct 10 ms 47452 KB Output is correct
8 Correct 10 ms 47580 KB Output is correct
9 Correct 9 ms 47448 KB Output is correct
10 Correct 10 ms 49496 KB Output is correct
11 Correct 10 ms 47800 KB Output is correct
12 Correct 11 ms 47708 KB Output is correct
13 Correct 10 ms 47708 KB Output is correct
14 Correct 12 ms 47708 KB Output is correct
15 Correct 10 ms 47704 KB Output is correct
16 Correct 11 ms 47960 KB Output is correct
17 Correct 10 ms 47708 KB Output is correct
18 Correct 11 ms 47708 KB Output is correct
19 Correct 10 ms 47960 KB Output is correct
20 Correct 11 ms 47704 KB Output is correct
21 Correct 10 ms 47708 KB Output is correct
22 Correct 12 ms 47964 KB Output is correct
23 Correct 11 ms 47708 KB Output is correct
24 Correct 10 ms 47708 KB Output is correct
25 Correct 11 ms 47708 KB Output is correct
26 Correct 11 ms 47704 KB Output is correct
27 Correct 10 ms 47708 KB Output is correct
28 Correct 11 ms 47648 KB Output is correct
29 Correct 12 ms 47708 KB Output is correct
30 Correct 10 ms 47704 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 221 ms 96208 KB Output is correct
2 Correct 108 ms 96716 KB Output is correct
3 Correct 209 ms 95780 KB Output is correct
4 Correct 110 ms 96604 KB Output is correct
5 Correct 212 ms 92616 KB Output is correct
6 Correct 112 ms 96548 KB Output is correct
7 Correct 204 ms 92528 KB Output is correct
8 Correct 106 ms 95608 KB Output is correct
9 Correct 201 ms 89344 KB Output is correct
10 Correct 194 ms 86676 KB Output is correct
11 Correct 206 ms 89788 KB Output is correct
12 Correct 224 ms 92428 KB Output is correct
13 Correct 193 ms 86484 KB Output is correct
14 Correct 201 ms 92628 KB Output is correct
15 Correct 202 ms 92536 KB Output is correct
16 Correct 189 ms 87452 KB Output is correct
17 Correct 190 ms 87976 KB Output is correct
18 Correct 188 ms 88208 KB Output is correct
19 Correct 210 ms 91340 KB Output is correct
20 Correct 196 ms 93640 KB Output is correct
21 Correct 10 ms 49496 KB Output is correct

Subtask #4
0 / 59.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 47452 KB Output is correct
2 Correct 9 ms 47452 KB Output is correct
3 Correct 9 ms 47576 KB Output is correct
4 Correct 9 ms 47660 KB Output is correct
5 Correct 9 ms 47452 KB Output is correct
6 Correct 9 ms 47452 KB Output is correct
7 Correct 10 ms 47452 KB Output is correct
8 Correct 10 ms 47580 KB Output is correct
9 Correct 9 ms 47448 KB Output is correct
10 Correct 10 ms 49496 KB Output is correct
11 Correct 10 ms 47800 KB Output is correct
12 Correct 11 ms 47708 KB Output is correct
13 Correct 10 ms 47708 KB Output is correct
14 Correct 12 ms 47708 KB Output is correct
15 Correct 10 ms 47704 KB Output is correct
16 Correct 11 ms 47960 KB Output is correct
17 Correct 10 ms 47708 KB Output is correct
18 Correct 11 ms 47708 KB Output is correct
19 Correct 10 ms 47960 KB Output is correct
20 Correct 11 ms 47704 KB Output is correct
21 Correct 10 ms 47708 KB Output is correct
22 Correct 12 ms 47964 KB Output is correct
23 Correct 11 ms 47708 KB Output is correct
24 Correct 10 ms 47708 KB Output is correct
25 Correct 11 ms 47708 KB Output is correct
26 Correct 11 ms 47704 KB Output is correct
27 Correct 10 ms 47708 KB Output is correct
28 Correct 11 ms 47648 KB Output is correct
29 Correct 12 ms 47708 KB Output is correct
30 Correct 10 ms 47704 KB Output is correct
31 Correct 221 ms 96208 KB Output is correct
32 Correct 108 ms 96716 KB Output is correct
33 Correct 209 ms 95780 KB Output is correct
34 Correct 110 ms 96604 KB Output is correct
35 Correct 212 ms 92616 KB Output is correct
36 Correct 112 ms 96548 KB Output is correct
37 Correct 204 ms 92528 KB Output is correct
38 Correct 106 ms 95608 KB Output is correct
39 Correct 201 ms 89344 KB Output is correct
40 Correct 194 ms 86676 KB Output is correct
41 Correct 206 ms 89788 KB Output is correct
42 Correct 224 ms 92428 KB Output is correct
43 Correct 193 ms 86484 KB Output is correct
44 Correct 201 ms 92628 KB Output is correct
45 Correct 202 ms 92536 KB Output is correct
46 Correct 189 ms 87452 KB Output is correct
47 Correct 190 ms 87976 KB Output is correct
48 Correct 188 ms 88208 KB Output is correct
49 Correct 210 ms 91340 KB Output is correct
50 Correct 196 ms 93640 KB Output is correct
51 Correct 10 ms 49496 KB Output is correct
52 Correct 189 ms 77140 KB Output is correct
53 Correct 191 ms 77140 KB Output is correct
54 Correct 193 ms 77100 KB Output is correct
55 Correct 209 ms 76976 KB Output is correct
56 Correct 182 ms 76956 KB Output is correct
57 Correct 188 ms 77088 KB Output is correct
58 Correct 197 ms 81616 KB Output is correct
59 Correct 214 ms 82636 KB Output is correct
60 Runtime error 1600 ms 524288 KB Execution killed with signal 9
61 Halted 0 ms 0 KB -