답안 #220617

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
220617	2020-04-08T09:12:39 Z	atoiz	Mergers (JOI19_mergers)	C++14	10 / 100	111 ms	38520 KB

mergers

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

const int MAXN = 500007;
int N, K, rt = 1, ans = 0;
int dsu[MAXN], group[MAXN], last[MAXN], val[MAXN];
vector<int> adj[MAXN], add[MAXN];

int root(int u) { return (dsu[u] != u ? dsu[u] = root(dsu[u]) : u); }

void dfs(int u, int p)
{
	dsu[u] = u;
	for (int v : add[u]) {
		if (dsu[v]) val[root(v)] -= 2;
	}

	for (int v : adj[u]) if (v != p) {
		dfs(v, u);
		dsu[v] = u;
		val[u] += val[v];
	}

	if (u != rt && !val[u]) ++val[u], ++ans;
}

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> N >> K;
	for (int i = 0; i < N - 1; ++i) {
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	for (int u = 1; u <= N; ++u) {
		cin >> group[u];
		if (last[group[u]]) {
			int v = last[group[u]];
			add[u].push_back(v);
			add[v].push_back(u);
			++val[u], ++val[v];
		}
		last[group[u]] = u;
	}

	if (N == 2) return cout << K - 1 << endl, 0;

	for (rt = 1; adj[rt].size() == 1; ++rt);
	dfs(rt, 0);
	cout << (ans + 1) / 2 << endl;
	return 0;
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	23808 KB	Output is correct
2	Correct	19 ms	23808 KB	Output is correct
3	Correct	19 ms	23936 KB	Output is correct
4	Correct	18 ms	23808 KB	Output is correct
5	Correct	18 ms	23936 KB	Output is correct
6	Correct	20 ms	23936 KB	Output is correct
7	Correct	18 ms	23936 KB	Output is correct
8	Correct	19 ms	23808 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	18 ms	23808 KB	Output is correct
11	Correct	18 ms	23808 KB	Output is correct
12	Correct	19 ms	23808 KB	Output is correct
13	Correct	19 ms	23808 KB	Output is correct
14	Correct	18 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	20 ms	23808 KB	Output is correct
17	Correct	19 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	18 ms	23808 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23936 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct

Subtask #2
0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	23808 KB	Output is correct
2	Correct	19 ms	23808 KB	Output is correct
3	Correct	19 ms	23936 KB	Output is correct
4	Correct	18 ms	23808 KB	Output is correct
5	Correct	18 ms	23936 KB	Output is correct
6	Correct	20 ms	23936 KB	Output is correct
7	Correct	18 ms	23936 KB	Output is correct
8	Correct	19 ms	23808 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	18 ms	23808 KB	Output is correct
11	Correct	18 ms	23808 KB	Output is correct
12	Correct	19 ms	23808 KB	Output is correct
13	Correct	19 ms	23808 KB	Output is correct
14	Correct	18 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	20 ms	23808 KB	Output is correct
17	Correct	19 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	18 ms	23808 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23936 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	19 ms	23808 KB	Output is correct
26	Correct	20 ms	24064 KB	Output is correct
27	Correct	20 ms	24064 KB	Output is correct
28	Correct	21 ms	24064 KB	Output is correct
29	Correct	21 ms	24064 KB	Output is correct
30	Correct	20 ms	24064 KB	Output is correct
31	Correct	19 ms	23808 KB	Output is correct
32	Correct	20 ms	24192 KB	Output is correct
33	Correct	18 ms	23808 KB	Output is correct
34	Correct	20 ms	24064 KB	Output is correct
35	Correct	21 ms	24064 KB	Output is correct
36	Incorrect	20 ms	24064 KB	Output isn't correct
37	Halted	0 ms	0 KB	-

Subtask #3
0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	23808 KB	Output is correct
2	Correct	19 ms	23808 KB	Output is correct
3	Correct	19 ms	23936 KB	Output is correct
4	Correct	18 ms	23808 KB	Output is correct
5	Correct	18 ms	23936 KB	Output is correct
6	Correct	20 ms	23936 KB	Output is correct
7	Correct	18 ms	23936 KB	Output is correct
8	Correct	19 ms	23808 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	18 ms	23808 KB	Output is correct
11	Correct	18 ms	23808 KB	Output is correct
12	Correct	19 ms	23808 KB	Output is correct
13	Correct	19 ms	23808 KB	Output is correct
14	Correct	18 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	20 ms	23808 KB	Output is correct
17	Correct	19 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	18 ms	23808 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23936 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	18 ms	23808 KB	Output is correct
26	Correct	93 ms	33136 KB	Output is correct
27	Correct	109 ms	32888 KB	Output is correct
28	Correct	20 ms	24064 KB	Output is correct
29	Correct	19 ms	23808 KB	Output is correct
30	Correct	19 ms	23808 KB	Output is correct
31	Correct	102 ms	32764 KB	Output is correct
32	Correct	20 ms	24064 KB	Output is correct
33	Correct	111 ms	38520 KB	Output is correct
34	Correct	107 ms	32888 KB	Output is correct
35	Incorrect	21 ms	24064 KB	Output isn't correct
36	Halted	0 ms	0 KB	-

Subtask #4
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	84 ms	31728 KB	Output is correct
2	Correct	78 ms	28912 KB	Output is correct
3	Correct	20 ms	24064 KB	Output is correct
4	Correct	22 ms	24064 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	18 ms	23808 KB	Output is correct
7	Correct	20 ms	24064 KB	Output is correct
8	Correct	104 ms	32760 KB	Output is correct
9	Incorrect	21 ms	24064 KB	Output isn't correct
10	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	23808 KB	Output is correct
2	Correct	19 ms	23808 KB	Output is correct
3	Correct	19 ms	23936 KB	Output is correct
4	Correct	18 ms	23808 KB	Output is correct
5	Correct	18 ms	23936 KB	Output is correct
6	Correct	20 ms	23936 KB	Output is correct
7	Correct	18 ms	23936 KB	Output is correct
8	Correct	19 ms	23808 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	18 ms	23808 KB	Output is correct
11	Correct	18 ms	23808 KB	Output is correct
12	Correct	19 ms	23808 KB	Output is correct
13	Correct	19 ms	23808 KB	Output is correct
14	Correct	18 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	20 ms	23808 KB	Output is correct
17	Correct	19 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	18 ms	23808 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23936 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	19 ms	23808 KB	Output is correct
26	Correct	20 ms	24064 KB	Output is correct
27	Correct	20 ms	24064 KB	Output is correct
28	Correct	21 ms	24064 KB	Output is correct
29	Correct	21 ms	24064 KB	Output is correct
30	Correct	20 ms	24064 KB	Output is correct
31	Correct	19 ms	23808 KB	Output is correct
32	Correct	20 ms	24192 KB	Output is correct
33	Correct	18 ms	23808 KB	Output is correct
34	Correct	20 ms	24064 KB	Output is correct
35	Correct	21 ms	24064 KB	Output is correct
36	Incorrect	20 ms	24064 KB	Output isn't correct
37	Halted	0 ms	0 KB	-

답안 #220617

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 0 / 24.0

Subtask #3 0 / 14.0

Subtask #4 0 / 22.0

Subtask #5 0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
0 / 24.0

Subtask #3
0 / 14.0

Subtask #4
0 / 22.0

Subtask #5
0 / 30.0