oj.uz

Submission #118848

# Submission time Handle Problem Language Result Execution time Memory
118848 2019-06-19T23:40:59 Z tmwilliamlin168 Mergers (JOI19_mergers) C++14
100 / 100
 1211 ms 104676 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN=5e5;
int n, k, tin[mxN], low[mxN], dt, ci, d[mxN], ans, who[mxN], st[2*mxN], sth;
vector<array<int, 2>> adj[mxN];
vector<int> bs[mxN];

void dfs1(int u=0, int p=-1) {
	tin[u]=dt++;
	for(array<int, 2> v : adj[u])
		if(v[1]^p)
			dfs1(v[0], v[1]);
}

void dfs2(int u=0, int p=-1) {
	tin[u]=low[u]=dt++;
	st[sth++]=u;
	for(array<int, 2> v : adj[u]) {
		if(v[1]==p)
			continue;
		if(!tin[v[0]]) {
			dfs2(v[0], v[1]);
			low[u]=min(low[v[0]], low[u]);
		} else
			low[u]=min(tin[v[0]], low[u]);
	}
	if(low[u]==tin[u]) {
		do
			who[st[sth-1]]=ci;
		while(st[--sth]^u);
		++ci;
	}
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	cin >> n >> k;
	for(int i=1, u, v; i<n; ++i) {
		cin >> u >> v, --u, --v;
		adj[u].push_back({v, i});
		adj[v].push_back({u, i});
	}
	for(int i=0, si; i<n; ++i)
		cin >> si, bs[si-1].push_back(i);
	dfs1();
	for(int i=0; i<k; ++i) {
		sort(bs[i].begin(), bs[i].end(), [](int i, int j) {
			return tin[i]<tin[j];
		});
		for(int j=0; j+1<bs[i].size(); ++j) {
			adj[bs[i][j]].push_back({bs[i][j+1], dt});
			adj[bs[i][j+1]].push_back({bs[i][j], dt++});
		}
	}
	memset(tin, 0, 4*n);
	dfs2();
	for(int i=0; i<n; ++i)
		for(array<int, 2> j : adj[i])
			if(who[i]^who[j[0]])
				++d[who[i]];
	for(int i=0; i<ci; ++i)
		ans+=d[i]==1;
	cout << (ans+1)/2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:53:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0; j+1<bs[i].size(); ++j) {
                ~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23808 KB Output is correct
2 Correct 23 ms 23808 KB Output is correct
3 Correct 22 ms 23936 KB Output is correct
4 Correct 21 ms 23808 KB Output is correct
5 Correct 22 ms 23808 KB Output is correct
6 Correct 23 ms 23936 KB Output is correct
7 Correct 23 ms 23936 KB Output is correct
8 Correct 24 ms 23936 KB Output is correct
9 Correct 23 ms 23936 KB Output is correct
10 Correct 22 ms 23808 KB Output is correct
11 Correct 23 ms 23936 KB Output is correct
12 Correct 24 ms 23936 KB Output is correct
13 Correct 23 ms 23808 KB Output is correct
14 Correct 23 ms 23936 KB Output is correct
15 Correct 23 ms 23808 KB Output is correct
16 Correct 24 ms 23808 KB Output is correct
17 Correct 36 ms 23936 KB Output is correct
18 Correct 23 ms 23808 KB Output is correct
19 Correct 23 ms 24064 KB Output is correct
20 Correct 23 ms 23804 KB Output is correct
21 Correct 23 ms 23936 KB Output is correct
22 Correct 23 ms 23928 KB Output is correct
23 Correct 23 ms 23936 KB Output is correct
24 Correct 23 ms 23936 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23808 KB Output is correct
2 Correct 23 ms 23808 KB Output is correct
3 Correct 22 ms 23936 KB Output is correct
4 Correct 21 ms 23808 KB Output is correct
5 Correct 22 ms 23808 KB Output is correct
6 Correct 23 ms 23936 KB Output is correct
7 Correct 23 ms 23936 KB Output is correct
8 Correct 24 ms 23936 KB Output is correct
9 Correct 23 ms 23936 KB Output is correct
10 Correct 22 ms 23808 KB Output is correct
11 Correct 23 ms 23936 KB Output is correct
12 Correct 24 ms 23936 KB Output is correct
13 Correct 23 ms 23808 KB Output is correct
14 Correct 23 ms 23936 KB Output is correct
15 Correct 23 ms 23808 KB Output is correct
16 Correct 24 ms 23808 KB Output is correct
17 Correct 36 ms 23936 KB Output is correct
18 Correct 23 ms 23808 KB Output is correct
19 Correct 23 ms 24064 KB Output is correct
20 Correct 23 ms 23804 KB Output is correct
21 Correct 23 ms 23936 KB Output is correct
22 Correct 23 ms 23928 KB Output is correct
23 Correct 23 ms 23936 KB Output is correct
24 Correct 23 ms 23936 KB Output is correct
25 Correct 23 ms 23936 KB Output is correct
26 Correct 25 ms 24184 KB Output is correct
27 Correct 25 ms 24192 KB Output is correct
28 Correct 26 ms 24312 KB Output is correct
29 Correct 25 ms 24192 KB Output is correct
30 Correct 25 ms 24320 KB Output is correct
31 Correct 22 ms 23952 KB Output is correct
32 Correct 26 ms 24320 KB Output is correct
33 Correct 21 ms 23936 KB Output is correct
34 Correct 23 ms 24192 KB Output is correct
35 Correct 24 ms 24100 KB Output is correct
36 Correct 25 ms 24192 KB Output is correct
37 Correct 24 ms 24184 KB Output is correct
38 Correct 22 ms 23800 KB Output is correct
39 Correct 25 ms 24320 KB Output is correct
40 Correct 24 ms 24320 KB Output is correct
41 Correct 24 ms 24192 KB Output is correct
42 Correct 24 ms 24192 KB Output is correct
43 Correct 25 ms 24320 KB Output is correct
44 Correct 22 ms 23936 KB Output is correct
45 Correct 24 ms 24184 KB Output is correct
46 Correct 24 ms 24192 KB Output is correct
47 Correct 23 ms 23808 KB Output is correct
48 Correct 25 ms 24184 KB Output is correct
49 Correct 24 ms 24312 KB Output is correct
50 Correct 24 ms 24192 KB Output is correct
51 Correct 24 ms 24192 KB Output is correct
52 Correct 23 ms 24192 KB Output is correct
53 Correct 24 ms 24120 KB Output is correct
54 Correct 24 ms 24320 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23808 KB Output is correct
2 Correct 23 ms 23808 KB Output is correct
3 Correct 22 ms 23936 KB Output is correct
4 Correct 21 ms 23808 KB Output is correct
5 Correct 22 ms 23808 KB Output is correct
6 Correct 23 ms 23936 KB Output is correct
7 Correct 23 ms 23936 KB Output is correct
8 Correct 24 ms 23936 KB Output is correct
9 Correct 23 ms 23936 KB Output is correct
10 Correct 22 ms 23808 KB Output is correct
11 Correct 23 ms 23936 KB Output is correct
12 Correct 24 ms 23936 KB Output is correct
13 Correct 23 ms 23808 KB Output is correct
14 Correct 23 ms 23936 KB Output is correct
15 Correct 23 ms 23808 KB Output is correct
16 Correct 24 ms 23808 KB Output is correct
17 Correct 36 ms 23936 KB Output is correct
18 Correct 23 ms 23808 KB Output is correct
19 Correct 23 ms 24064 KB Output is correct
20 Correct 23 ms 23804 KB Output is correct
21 Correct 23 ms 23936 KB Output is correct
22 Correct 23 ms 23928 KB Output is correct
23 Correct 23 ms 23936 KB Output is correct
24 Correct 23 ms 23936 KB Output is correct
25 Correct 22 ms 23800 KB Output is correct
26 Correct 131 ms 33868 KB Output is correct
27 Correct 186 ms 38108 KB Output is correct
28 Correct 26 ms 24184 KB Output is correct
29 Correct 23 ms 23808 KB Output is correct
30 Correct 22 ms 23936 KB Output is correct
31 Correct 158 ms 34168 KB Output is correct
32 Correct 25 ms 24192 KB Output is correct
33 Correct 170 ms 39256 KB Output is correct
34 Correct 154 ms 36472 KB Output is correct
35 Correct 25 ms 24184 KB Output is correct
36 Correct 170 ms 33328 KB Output is correct
37 Correct 25 ms 24448 KB Output is correct
38 Correct 26 ms 24192 KB Output is correct
39 Correct 150 ms 33768 KB Output is correct
40 Correct 26 ms 24312 KB Output is correct
41 Correct 163 ms 39988 KB Output is correct
42 Correct 172 ms 38264 KB Output is correct
43 Correct 24 ms 23936 KB Output is correct
44 Correct 165 ms 39024 KB Output is correct
45 Correct 169 ms 38776 KB Output is correct
46 Correct 26 ms 24184 KB Output is correct
47 Correct 24 ms 24312 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 33772 KB Output is correct
2 Correct 93 ms 34284 KB Output is correct
3 Correct 24 ms 24192 KB Output is correct
4 Correct 24 ms 24312 KB Output is correct
5 Correct 22 ms 23808 KB Output is correct
6 Correct 22 ms 23936 KB Output is correct
7 Correct 24 ms 24192 KB Output is correct
8 Correct 136 ms 33528 KB Output is correct
9 Correct 25 ms 24184 KB Output is correct
10 Correct 136 ms 33616 KB Output is correct
11 Correct 22 ms 23936 KB Output is correct
12 Correct 152 ms 32764 KB Output is correct
13 Correct 162 ms 33560 KB Output is correct
14 Correct 113 ms 34168 KB Output is correct
15 Correct 144 ms 33932 KB Output is correct
16 Correct 25 ms 24192 KB Output is correct
17 Correct 22 ms 23808 KB Output is correct
18 Correct 99 ms 33896 KB Output is correct
19 Correct 147 ms 36860 KB Output is correct
20 Correct 24 ms 24184 KB Output is correct
21 Correct 22 ms 23936 KB Output is correct
22 Correct 113 ms 33236 KB Output is correct
23 Correct 24 ms 24192 KB Output is correct
24 Correct 142 ms 33144 KB Output is correct
25 Correct 130 ms 36600 KB Output is correct
26 Correct 24 ms 24192 KB Output is correct
27 Correct 24 ms 24192 KB Output is correct
28 Correct 25 ms 24192 KB Output is correct
29 Correct 24 ms 24192 KB Output is correct
30 Correct 25 ms 24184 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23808 KB Output is correct
2 Correct 23 ms 23808 KB Output is correct
3 Correct 22 ms 23936 KB Output is correct
4 Correct 21 ms 23808 KB Output is correct
5 Correct 22 ms 23808 KB Output is correct
6 Correct 23 ms 23936 KB Output is correct
7 Correct 23 ms 23936 KB Output is correct
8 Correct 24 ms 23936 KB Output is correct
9 Correct 23 ms 23936 KB Output is correct
10 Correct 22 ms 23808 KB Output is correct
11 Correct 23 ms 23936 KB Output is correct
12 Correct 24 ms 23936 KB Output is correct
13 Correct 23 ms 23808 KB Output is correct
14 Correct 23 ms 23936 KB Output is correct
15 Correct 23 ms 23808 KB Output is correct
16 Correct 24 ms 23808 KB Output is correct
17 Correct 36 ms 23936 KB Output is correct
18 Correct 23 ms 23808 KB Output is correct
19 Correct 23 ms 24064 KB Output is correct
20 Correct 23 ms 23804 KB Output is correct
21 Correct 23 ms 23936 KB Output is correct
22 Correct 23 ms 23928 KB Output is correct
23 Correct 23 ms 23936 KB Output is correct
24 Correct 23 ms 23936 KB Output is correct
25 Correct 23 ms 23936 KB Output is correct
26 Correct 25 ms 24184 KB Output is correct
27 Correct 25 ms 24192 KB Output is correct
28 Correct 26 ms 24312 KB Output is correct
29 Correct 25 ms 24192 KB Output is correct
30 Correct 25 ms 24320 KB Output is correct
31 Correct 22 ms 23952 KB Output is correct
32 Correct 26 ms 24320 KB Output is correct
33 Correct 21 ms 23936 KB Output is correct
34 Correct 23 ms 24192 KB Output is correct
35 Correct 24 ms 24100 KB Output is correct
36 Correct 25 ms 24192 KB Output is correct
37 Correct 24 ms 24184 KB Output is correct
38 Correct 22 ms 23800 KB Output is correct
39 Correct 25 ms 24320 KB Output is correct
40 Correct 24 ms 24320 KB Output is correct
41 Correct 24 ms 24192 KB Output is correct
42 Correct 24 ms 24192 KB Output is correct
43 Correct 25 ms 24320 KB Output is correct
44 Correct 22 ms 23936 KB Output is correct
45 Correct 24 ms 24184 KB Output is correct
46 Correct 24 ms 24192 KB Output is correct
47 Correct 23 ms 23808 KB Output is correct
48 Correct 25 ms 24184 KB Output is correct
49 Correct 24 ms 24312 KB Output is correct
50 Correct 24 ms 24192 KB Output is correct
51 Correct 24 ms 24192 KB Output is correct
52 Correct 23 ms 24192 KB Output is correct
53 Correct 24 ms 24120 KB Output is correct
54 Correct 24 ms 24320 KB Output is correct
55 Correct 22 ms 23800 KB Output is correct
56 Correct 131 ms 33868 KB Output is correct
57 Correct 186 ms 38108 KB Output is correct
58 Correct 26 ms 24184 KB Output is correct
59 Correct 23 ms 23808 KB Output is correct
60 Correct 22 ms 23936 KB Output is correct
61 Correct 158 ms 34168 KB Output is correct
62 Correct 25 ms 24192 KB Output is correct
63 Correct 170 ms 39256 KB Output is correct
64 Correct 154 ms 36472 KB Output is correct
65 Correct 25 ms 24184 KB Output is correct
66 Correct 170 ms 33328 KB Output is correct
67 Correct 25 ms 24448 KB Output is correct
68 Correct 26 ms 24192 KB Output is correct
69 Correct 150 ms 33768 KB Output is correct
70 Correct 26 ms 24312 KB Output is correct
71 Correct 163 ms 39988 KB Output is correct
72 Correct 172 ms 38264 KB Output is correct
73 Correct 24 ms 23936 KB Output is correct
74 Correct 165 ms 39024 KB Output is correct
75 Correct 169 ms 38776 KB Output is correct
76 Correct 26 ms 24184 KB Output is correct
77 Correct 24 ms 24312 KB Output is correct
78 Correct 108 ms 33772 KB Output is correct
79 Correct 93 ms 34284 KB Output is correct
80 Correct 24 ms 24192 KB Output is correct
81 Correct 24 ms 24312 KB Output is correct
82 Correct 22 ms 23808 KB Output is correct
83 Correct 22 ms 23936 KB Output is correct
84 Correct 24 ms 24192 KB Output is correct
85 Correct 136 ms 33528 KB Output is correct
86 Correct 25 ms 24184 KB Output is correct
87 Correct 136 ms 33616 KB Output is correct
88 Correct 22 ms 23936 KB Output is correct
89 Correct 152 ms 32764 KB Output is correct
90 Correct 162 ms 33560 KB Output is correct
91 Correct 113 ms 34168 KB Output is correct
92 Correct 144 ms 33932 KB Output is correct
93 Correct 25 ms 24192 KB Output is correct
94 Correct 22 ms 23808 KB Output is correct
95 Correct 99 ms 33896 KB Output is correct
96 Correct 147 ms 36860 KB Output is correct
97 Correct 24 ms 24184 KB Output is correct
98 Correct 22 ms 23936 KB Output is correct
99 Correct 113 ms 33236 KB Output is correct
100 Correct 24 ms 24192 KB Output is correct
101 Correct 142 ms 33144 KB Output is correct
102 Correct 130 ms 36600 KB Output is correct
103 Correct 24 ms 24192 KB Output is correct
104 Correct 24 ms 24192 KB Output is correct
105 Correct 25 ms 24192 KB Output is correct
106 Correct 24 ms 24192 KB Output is correct
107 Correct 25 ms 24184 KB Output is correct
108 Correct 871 ms 72832 KB Output is correct
109 Correct 1126 ms 90548 KB Output is correct
110 Correct 1192 ms 100476 KB Output is correct
111 Correct 1016 ms 93048 KB Output is correct
112 Correct 998 ms 86392 KB Output is correct
113 Correct 674 ms 75732 KB Output is correct
114 Correct 1174 ms 102776 KB Output is correct
115 Correct 1211 ms 104676 KB Output is correct
116 Correct 1169 ms 75228 KB Output is correct
117 Correct 1002 ms 76080 KB Output is correct
118 Correct 1129 ms 72740 KB Output is correct
119 Correct 913 ms 76024 KB Output is correct
120 Correct 967 ms 89464 KB Output is correct
121 Correct 893 ms 76280 KB Output is correct
122 Correct 1106 ms 89080 KB Output is correct
123 Correct 586 ms 77024 KB Output is correct
124 Correct 1014 ms 71928 KB Output is correct