oj.uz

Submission #376884

# Submission time Handle Problem Language Result Execution time Memory
376884 2021-03-12T06:05:56 Z casperwang Mergers (JOI19_mergers) C++14
48 / 100
 3000 ms 30852 KB 
#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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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 -