oj.uz

답안 #932925

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
932925 2024-02-24T14:39:08 Z ParsaS 수도 (JOI20_capital_city) C++17
41 / 100
 1533 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];
int CNT = 0;

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]);

		CNT++;
		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 15 ms 47452 KB Output is correct
2 Correct 9 ms 47576 KB Output is correct
3 Correct 9 ms 47452 KB Output is correct
4 Correct 9 ms 47608 KB Output is correct
5 Correct 10 ms 47660 KB Output is correct
6 Correct 11 ms 47452 KB Output is correct
7 Correct 9 ms 47448 KB Output is correct
8 Correct 10 ms 47452 KB Output is correct
9 Correct 10 ms 47452 KB Output is correct
10 Correct 11 ms 49500 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 47452 KB Output is correct
2 Correct 9 ms 47576 KB Output is correct
3 Correct 9 ms 47452 KB Output is correct
4 Correct 9 ms 47608 KB Output is correct
5 Correct 10 ms 47660 KB Output is correct
6 Correct 11 ms 47452 KB Output is correct
7 Correct 9 ms 47448 KB Output is correct
8 Correct 10 ms 47452 KB Output is correct
9 Correct 10 ms 47452 KB Output is correct
10 Correct 11 ms 49500 KB Output is correct
11 Correct 11 ms 47704 KB Output is correct
12 Correct 11 ms 47708 KB Output is correct
13 Correct 11 ms 47576 KB Output is correct
14 Correct 11 ms 47708 KB Output is correct
15 Correct 11 ms 47836 KB Output is correct
16 Correct 11 ms 47960 KB Output is correct
17 Correct 13 ms 47708 KB Output is correct
18 Correct 11 ms 47708 KB Output is correct
19 Correct 11 ms 47708 KB Output is correct
20 Correct 11 ms 47716 KB Output is correct
21 Correct 10 ms 47708 KB Output is correct
22 Correct 10 ms 47964 KB Output is correct
23 Correct 11 ms 47860 KB Output is correct
24 Correct 11 ms 47888 KB Output is correct
25 Correct 10 ms 47704 KB Output is correct
26 Correct 11 ms 47804 KB Output is correct
27 Correct 11 ms 47708 KB Output is correct
28 Correct 11 ms 47896 KB Output is correct
29 Correct 10 ms 47708 KB Output is correct
30 Correct 11 ms 47708 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 238 ms 96124 KB Output is correct
2 Correct 109 ms 96716 KB Output is correct
3 Correct 206 ms 95948 KB Output is correct
4 Correct 114 ms 96716 KB Output is correct
5 Correct 214 ms 92436 KB Output is correct
6 Correct 108 ms 96524 KB Output is correct
7 Correct 203 ms 92624 KB Output is correct
8 Correct 110 ms 95468 KB Output is correct
9 Correct 208 ms 89400 KB Output is correct
10 Correct 204 ms 86744 KB Output is correct
11 Correct 204 ms 89868 KB Output is correct
12 Correct 255 ms 92364 KB Output is correct
13 Correct 203 ms 86792 KB Output is correct
14 Correct 212 ms 92712 KB Output is correct
15 Correct 203 ms 92468 KB Output is correct
16 Correct 212 ms 87552 KB Output is correct
17 Correct 195 ms 87924 KB Output is correct
18 Correct 208 ms 88268 KB Output is correct
19 Correct 200 ms 91472 KB Output is correct
20 Correct 243 ms 93420 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 15 ms 47452 KB Output is correct
2 Correct 9 ms 47576 KB Output is correct
3 Correct 9 ms 47452 KB Output is correct
4 Correct 9 ms 47608 KB Output is correct
5 Correct 10 ms 47660 KB Output is correct
6 Correct 11 ms 47452 KB Output is correct
7 Correct 9 ms 47448 KB Output is correct
8 Correct 10 ms 47452 KB Output is correct
9 Correct 10 ms 47452 KB Output is correct
10 Correct 11 ms 49500 KB Output is correct
11 Correct 11 ms 47704 KB Output is correct
12 Correct 11 ms 47708 KB Output is correct
13 Correct 11 ms 47576 KB Output is correct
14 Correct 11 ms 47708 KB Output is correct
15 Correct 11 ms 47836 KB Output is correct
16 Correct 11 ms 47960 KB Output is correct
17 Correct 13 ms 47708 KB Output is correct
18 Correct 11 ms 47708 KB Output is correct
19 Correct 11 ms 47708 KB Output is correct
20 Correct 11 ms 47716 KB Output is correct
21 Correct 10 ms 47708 KB Output is correct
22 Correct 10 ms 47964 KB Output is correct
23 Correct 11 ms 47860 KB Output is correct
24 Correct 11 ms 47888 KB Output is correct
25 Correct 10 ms 47704 KB Output is correct
26 Correct 11 ms 47804 KB Output is correct
27 Correct 11 ms 47708 KB Output is correct
28 Correct 11 ms 47896 KB Output is correct
29 Correct 10 ms 47708 KB Output is correct
30 Correct 11 ms 47708 KB Output is correct
31 Correct 238 ms 96124 KB Output is correct
32 Correct 109 ms 96716 KB Output is correct
33 Correct 206 ms 95948 KB Output is correct
34 Correct 114 ms 96716 KB Output is correct
35 Correct 214 ms 92436 KB Output is correct
36 Correct 108 ms 96524 KB Output is correct
37 Correct 203 ms 92624 KB Output is correct
38 Correct 110 ms 95468 KB Output is correct
39 Correct 208 ms 89400 KB Output is correct
40 Correct 204 ms 86744 KB Output is correct
41 Correct 204 ms 89868 KB Output is correct
42 Correct 255 ms 92364 KB Output is correct
43 Correct 203 ms 86792 KB Output is correct
44 Correct 212 ms 92712 KB Output is correct
45 Correct 203 ms 92468 KB Output is correct
46 Correct 212 ms 87552 KB Output is correct
47 Correct 195 ms 87924 KB Output is correct
48 Correct 208 ms 88268 KB Output is correct
49 Correct 200 ms 91472 KB Output is correct
50 Correct 243 ms 93420 KB Output is correct
51 Correct 10 ms 49496 KB Output is correct
52 Correct 184 ms 76972 KB Output is correct
53 Correct 205 ms 77144 KB Output is correct
54 Correct 188 ms 76968 KB Output is correct
55 Correct 194 ms 77276 KB Output is correct
56 Correct 218 ms 76980 KB Output is correct
57 Correct 191 ms 77044 KB Output is correct
58 Correct 204 ms 81448 KB Output is correct
59 Correct 243 ms 82344 KB Output is correct
60 Runtime error 1533 ms 524288 KB Execution killed with signal 9
61 Halted 0 ms 0 KB -