답안 #376884

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
376884	2021-03-12T06:05:56 Z	casperwang	Mergers (JOI19_mergers)	C++14	48 / 100	3000 ms	30852 KB

mergers

#include <bits/stdc++.h>
#define pb emplace_back
using namespace std;
#define debug(args...) kout("[ " + string(#args) + " ]", args)
void kout() { cerr << endl; }
template <class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ',kout(b...); }
template <class T> void pary(T L, T R) { while (L != R) cerr << *L << " \n"[++L==R]; }

const int MAXN = 500000;
int N, K;
int a, b;
vector <int> path[MAXN+1];
vector <int> G[MAXN+1];
int v[MAXN+1];
int dsu[MAXN+1];
int sze[MAXN+1];
bool vis[MAXN+1];
int k[MAXN+1];
int ans = 0;

int fnd(int a) {
	return dsu[a] == a ? a : dsu[a] = fnd(dsu[a]);
}

void Merge(int a, int b) {
	a = fnd(a), b = fnd(b);
	if (a == b) return;
	if (sze[a] > sze[b]) {
		dsu[b] = a;
		sze[a] += sze[b];
	} else {
		dsu[a] = b;
		sze[b] += sze[a];
	}
}

void BFS(int st) {
	for (int i = 1; i <= N; i++)
		k[i] = 0;
	k[st] = st;
	queue <int> nxt;
	nxt.push(st);
	while (nxt.size()) {
		int now = nxt.front();
		nxt.pop();
		for (int i : path[now]) {
			if (i == k[now]) continue;
			k[i] = now;
			nxt.push(i);
		}
	}
	for (int i = 1; i <= N; i++) {
		if (v[i] != v[st]) continue;
		int t = i;
		while (k[t] != t) {
			if (fnd(t) == fnd(st)) break;
			Merge(t, k[t]);
			t = k[t];
		}
	}
	return;
}

signed main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> N >> K;
	for (int i = 1; i < N; i++) {
		cin >> a >> b;
		path[a].pb(b);
		path[b].pb(a);
	}
	for (int i = 1; i <= N; i++) {
		cin >> v[i];
		dsu[i] = i;
		sze[i] = 1;
	}
	for (int i = 1; i <= N; i++) {
		if (vis[v[i]]) continue;
		BFS(i);
		vis[v[i]] = true;
	}
	for (int i = 1; i <= N; i++) {
		for (int j : path[i]) {
			if (fnd(i) == fnd(j)) continue;
			G[fnd(i)].pb(fnd(j));
		}
	}
	for (int i = 1; i <= N; i++) {
		if (fnd(i) != i || !G[i].size()) continue;
		bool flag = true;
		for (int j : G[i])
			flag &= (j == G[i][0]);
		if (flag) ans++;
	}
	cout << (ans+1)/2 << '\n';
	return 0;
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	23788 KB	Output is correct
2	Correct	17 ms	23916 KB	Output is correct
3	Correct	17 ms	23916 KB	Output is correct
4	Correct	16 ms	23788 KB	Output is correct
5	Correct	16 ms	23788 KB	Output is correct
6	Correct	17 ms	23916 KB	Output is correct
7	Correct	17 ms	23916 KB	Output is correct
8	Correct	17 ms	23916 KB	Output is correct
9	Correct	17 ms	23916 KB	Output is correct
10	Correct	19 ms	23936 KB	Output is correct
11	Correct	17 ms	23916 KB	Output is correct
12	Correct	17 ms	23916 KB	Output is correct
13	Correct	17 ms	23916 KB	Output is correct
14	Correct	17 ms	23932 KB	Output is correct
15	Correct	17 ms	23936 KB	Output is correct
16	Correct	17 ms	23916 KB	Output is correct
17	Correct	17 ms	23936 KB	Output is correct
18	Correct	17 ms	23924 KB	Output is correct
19	Correct	17 ms	23916 KB	Output is correct
20	Correct	17 ms	23916 KB	Output is correct
21	Correct	17 ms	23916 KB	Output is correct
22	Correct	17 ms	23916 KB	Output is correct
23	Correct	17 ms	23916 KB	Output is correct
24	Correct	16 ms	23916 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	23788 KB	Output is correct
2	Correct	17 ms	23916 KB	Output is correct
3	Correct	17 ms	23916 KB	Output is correct
4	Correct	16 ms	23788 KB	Output is correct
5	Correct	16 ms	23788 KB	Output is correct
6	Correct	17 ms	23916 KB	Output is correct
7	Correct	17 ms	23916 KB	Output is correct
8	Correct	17 ms	23916 KB	Output is correct
9	Correct	17 ms	23916 KB	Output is correct
10	Correct	19 ms	23936 KB	Output is correct
11	Correct	17 ms	23916 KB	Output is correct
12	Correct	17 ms	23916 KB	Output is correct
13	Correct	17 ms	23916 KB	Output is correct
14	Correct	17 ms	23932 KB	Output is correct
15	Correct	17 ms	23936 KB	Output is correct
16	Correct	17 ms	23916 KB	Output is correct
17	Correct	17 ms	23936 KB	Output is correct
18	Correct	17 ms	23924 KB	Output is correct
19	Correct	17 ms	23916 KB	Output is correct
20	Correct	17 ms	23916 KB	Output is correct
21	Correct	17 ms	23916 KB	Output is correct
22	Correct	17 ms	23916 KB	Output is correct
23	Correct	17 ms	23916 KB	Output is correct
24	Correct	16 ms	23916 KB	Output is correct
25	Correct	18 ms	23888 KB	Output is correct
26	Correct	160 ms	24044 KB	Output is correct
27	Correct	22 ms	24064 KB	Output is correct
28	Correct	211 ms	24192 KB	Output is correct
29	Correct	213 ms	24172 KB	Output is correct
30	Correct	31 ms	24044 KB	Output is correct
31	Correct	17 ms	23916 KB	Output is correct
32	Correct	242 ms	24172 KB	Output is correct
33	Correct	19 ms	23916 KB	Output is correct
34	Correct	19 ms	24044 KB	Output is correct
35	Correct	213 ms	24172 KB	Output is correct
36	Correct	23 ms	24044 KB	Output is correct
37	Correct	131 ms	24172 KB	Output is correct
38	Correct	19 ms	23916 KB	Output is correct
39	Correct	143 ms	24044 KB	Output is correct
40	Correct	18 ms	24044 KB	Output is correct
41	Correct	19 ms	24044 KB	Output is correct
42	Correct	66 ms	24128 KB	Output is correct
43	Correct	18 ms	24044 KB	Output is correct
44	Correct	17 ms	24044 KB	Output is correct
45	Correct	251 ms	24172 KB	Output is correct
46	Correct	121 ms	24172 KB	Output is correct
47	Correct	17 ms	23916 KB	Output is correct
48	Correct	60 ms	24044 KB	Output is correct
49	Correct	119 ms	24172 KB	Output is correct
50	Correct	202 ms	24172 KB	Output is correct
51	Correct	65 ms	24044 KB	Output is correct
52	Correct	20 ms	24064 KB	Output is correct
53	Correct	81 ms	24044 KB	Output is correct
54	Correct	25 ms	24044 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	23788 KB	Output is correct
2	Correct	17 ms	23916 KB	Output is correct
3	Correct	17 ms	23916 KB	Output is correct
4	Correct	16 ms	23788 KB	Output is correct
5	Correct	16 ms	23788 KB	Output is correct
6	Correct	17 ms	23916 KB	Output is correct
7	Correct	17 ms	23916 KB	Output is correct
8	Correct	17 ms	23916 KB	Output is correct
9	Correct	17 ms	23916 KB	Output is correct
10	Correct	19 ms	23936 KB	Output is correct
11	Correct	17 ms	23916 KB	Output is correct
12	Correct	17 ms	23916 KB	Output is correct
13	Correct	17 ms	23916 KB	Output is correct
14	Correct	17 ms	23932 KB	Output is correct
15	Correct	17 ms	23936 KB	Output is correct
16	Correct	17 ms	23916 KB	Output is correct
17	Correct	17 ms	23936 KB	Output is correct
18	Correct	17 ms	23924 KB	Output is correct
19	Correct	17 ms	23916 KB	Output is correct
20	Correct	17 ms	23916 KB	Output is correct
21	Correct	17 ms	23916 KB	Output is correct
22	Correct	17 ms	23916 KB	Output is correct
23	Correct	17 ms	23916 KB	Output is correct
24	Correct	16 ms	23916 KB	Output is correct
25	Correct	17 ms	23916 KB	Output is correct
26	Correct	183 ms	30324 KB	Output is correct
27	Correct	609 ms	29420 KB	Output is correct
28	Correct	22 ms	24044 KB	Output is correct
29	Correct	17 ms	23916 KB	Output is correct
30	Correct	18 ms	23916 KB	Output is correct
31	Correct	543 ms	29420 KB	Output is correct
32	Correct	20 ms	24076 KB	Output is correct
33	Correct	856 ms	29228 KB	Output is correct
34	Correct	597 ms	29548 KB	Output is correct
35	Correct	21 ms	24044 KB	Output is correct
36	Correct	879 ms	29036 KB	Output is correct
37	Correct	19 ms	24044 KB	Output is correct
38	Correct	21 ms	24044 KB	Output is correct
39	Correct	214 ms	29744 KB	Output is correct
40	Correct	19 ms	24004 KB	Output is correct
41	Correct	93 ms	29164 KB	Output is correct
42	Correct	889 ms	29008 KB	Output is correct
43	Correct	17 ms	24064 KB	Output is correct
44	Correct	106 ms	28908 KB	Output is correct
45	Correct	544 ms	29036 KB	Output is correct
46	Correct	20 ms	24044 KB	Output is correct
47	Correct	21 ms	24044 KB	Output is correct

Subtask #4
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	199 ms	29492 KB	Output is correct
2	Execution timed out	3083 ms	30852 KB	Time limit exceeded
3	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	23788 KB	Output is correct
2	Correct	17 ms	23916 KB	Output is correct
3	Correct	17 ms	23916 KB	Output is correct
4	Correct	16 ms	23788 KB	Output is correct
5	Correct	16 ms	23788 KB	Output is correct
6	Correct	17 ms	23916 KB	Output is correct
7	Correct	17 ms	23916 KB	Output is correct
8	Correct	17 ms	23916 KB	Output is correct
9	Correct	17 ms	23916 KB	Output is correct
10	Correct	19 ms	23936 KB	Output is correct
11	Correct	17 ms	23916 KB	Output is correct
12	Correct	17 ms	23916 KB	Output is correct
13	Correct	17 ms	23916 KB	Output is correct
14	Correct	17 ms	23932 KB	Output is correct
15	Correct	17 ms	23936 KB	Output is correct
16	Correct	17 ms	23916 KB	Output is correct
17	Correct	17 ms	23936 KB	Output is correct
18	Correct	17 ms	23924 KB	Output is correct
19	Correct	17 ms	23916 KB	Output is correct
20	Correct	17 ms	23916 KB	Output is correct
21	Correct	17 ms	23916 KB	Output is correct
22	Correct	17 ms	23916 KB	Output is correct
23	Correct	17 ms	23916 KB	Output is correct
24	Correct	16 ms	23916 KB	Output is correct
25	Correct	18 ms	23888 KB	Output is correct
26	Correct	160 ms	24044 KB	Output is correct
27	Correct	22 ms	24064 KB	Output is correct
28	Correct	211 ms	24192 KB	Output is correct
29	Correct	213 ms	24172 KB	Output is correct
30	Correct	31 ms	24044 KB	Output is correct
31	Correct	17 ms	23916 KB	Output is correct
32	Correct	242 ms	24172 KB	Output is correct
33	Correct	19 ms	23916 KB	Output is correct
34	Correct	19 ms	24044 KB	Output is correct
35	Correct	213 ms	24172 KB	Output is correct
36	Correct	23 ms	24044 KB	Output is correct
37	Correct	131 ms	24172 KB	Output is correct
38	Correct	19 ms	23916 KB	Output is correct
39	Correct	143 ms	24044 KB	Output is correct
40	Correct	18 ms	24044 KB	Output is correct
41	Correct	19 ms	24044 KB	Output is correct
42	Correct	66 ms	24128 KB	Output is correct
43	Correct	18 ms	24044 KB	Output is correct
44	Correct	17 ms	24044 KB	Output is correct
45	Correct	251 ms	24172 KB	Output is correct
46	Correct	121 ms	24172 KB	Output is correct
47	Correct	17 ms	23916 KB	Output is correct
48	Correct	60 ms	24044 KB	Output is correct
49	Correct	119 ms	24172 KB	Output is correct
50	Correct	202 ms	24172 KB	Output is correct
51	Correct	65 ms	24044 KB	Output is correct
52	Correct	20 ms	24064 KB	Output is correct
53	Correct	81 ms	24044 KB	Output is correct
54	Correct	25 ms	24044 KB	Output is correct
55	Correct	17 ms	23916 KB	Output is correct
56	Correct	183 ms	30324 KB	Output is correct
57	Correct	609 ms	29420 KB	Output is correct
58	Correct	22 ms	24044 KB	Output is correct
59	Correct	17 ms	23916 KB	Output is correct
60	Correct	18 ms	23916 KB	Output is correct
61	Correct	543 ms	29420 KB	Output is correct
62	Correct	20 ms	24076 KB	Output is correct
63	Correct	856 ms	29228 KB	Output is correct
64	Correct	597 ms	29548 KB	Output is correct
65	Correct	21 ms	24044 KB	Output is correct
66	Correct	879 ms	29036 KB	Output is correct
67	Correct	19 ms	24044 KB	Output is correct
68	Correct	21 ms	24044 KB	Output is correct
69	Correct	214 ms	29744 KB	Output is correct
70	Correct	19 ms	24004 KB	Output is correct
71	Correct	93 ms	29164 KB	Output is correct
72	Correct	889 ms	29008 KB	Output is correct
73	Correct	17 ms	24064 KB	Output is correct
74	Correct	106 ms	28908 KB	Output is correct
75	Correct	544 ms	29036 KB	Output is correct
76	Correct	20 ms	24044 KB	Output is correct
77	Correct	21 ms	24044 KB	Output is correct
78	Correct	199 ms	29492 KB	Output is correct
79	Execution timed out	3083 ms	30852 KB	Time limit exceeded
80	Halted	0 ms	0 KB	-

답안 #376884

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 0 / 22.0

Subtask #5 0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
24.0 / 24.0

Subtask #3
14.0 / 14.0

Subtask #4
0 / 22.0

Subtask #5
0 / 30.0