답안 #138103

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138103	2019-07-29T10:53:01 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	1476 ms	126176 KB

mergers

#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
typedef long long ll;
const int N = 5e5+5;
int n, m, ans, cur, s[N], dep[N], sp[N][20], sub[N], ret[N], mark[N], acc[N], deg[N];
vector<int> adj[N], vec[N];
void pre(int u, int p)
{
	sub[u] = 1;
	dep[u] = dep[p]+1;
	sp[u][0] = p;
	for(int i=1; i<20; i++) sp[u][i] = sp[sp[u][i-1]][i-1];
	for(int v : adj[u]) if(v != p) pre(v, u), sub[u] += sub[v];	
}	
int equate(int u, int v)
{
	int c = dep[u]-dep[v];
	for(int i=0; i<20; i++) if(c & (1<<i)) u = sp[u][i];
	return u;
}
int LCA(int u, int v)
{
	if(dep[u] < dep[v]) swap(u, v);
	u = equate(u, v);
	if(u == v) return u;
	for(int i=19; i>=0; i--) if(sp[u][i] != sp[v][i]) u = sp[u][i], v = sp[v][i];
	return sp[u][0];
}
void calc(int u, int p)
{
	for(auto v : adj[u]) if(v != p) calc(v, u), ret[u] += ret[v];
	if(ret[u] == sub[u]) mark[u] = 1;
}
void DFS(int u, int p, int last)
{
	if(mark[u] && u != last) deg[u]++, deg[last]++, last = u;
	for(int v : adj[u]) if(p != v) DFS(v, u, last);
}
int main()
{
	scanf("%d %d", &n, &m);
	memset(sp, -1, sizeof sp);
	for(int i=1, a, b; i<n; i++) scanf("%d %d", &a, &b),
	adj[a].push_back(b), adj[b].push_back(a);
	for(int i=1; i<=n; i++) scanf("%d", &s[i]), vec[s[i]].push_back(i);
	pre(1, 0);
	for(int i=1; i<=m; i++) 
	{
		if(vec[i].empty()) continue;
		int node = vec[i][0];
		for(auto u : vec[i]) node = LCA(node, u);
		ret[node] += vec[i].size();
	}
	if(n == 1 || m == 1) return cout << 0 << endl, 0;
	calc(1, 0);
	mark[1] = 0;
	DFS(1, 0, 1);
	for(int i=1; i<=n; i++) ans += (deg[i]==1);
	cout << (ans+1)/2 << endl;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:46:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1, a, b; i<n; i++) scanf("%d %d", &a, &b),
                               ~~~~~~~~~~~~~~~~~~~~~~~~
  adj[a].push_back(b), adj[b].push_back(a);
  ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
mergers.cpp:47:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=n; i++) scanf("%d", &s[i]), vec[s[i]].push_back(i);
                          ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	63228 KB	Output is correct
2	Correct	57 ms	62968 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	63 ms	63056 KB	Output is correct
5	Correct	57 ms	63096 KB	Output is correct
6	Correct	58 ms	63096 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	57 ms	62968 KB	Output is correct
9	Correct	57 ms	62968 KB	Output is correct
10	Correct	56 ms	62984 KB	Output is correct
11	Correct	58 ms	62968 KB	Output is correct
12	Correct	56 ms	62968 KB	Output is correct
13	Correct	56 ms	62940 KB	Output is correct
14	Correct	56 ms	62968 KB	Output is correct
15	Correct	56 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	57 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	60 ms	63096 KB	Output is correct
20	Correct	57 ms	63004 KB	Output is correct
21	Correct	57 ms	62968 KB	Output is correct
22	Correct	57 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	57 ms	63140 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	63228 KB	Output is correct
2	Correct	57 ms	62968 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	63 ms	63056 KB	Output is correct
5	Correct	57 ms	63096 KB	Output is correct
6	Correct	58 ms	63096 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	57 ms	62968 KB	Output is correct
9	Correct	57 ms	62968 KB	Output is correct
10	Correct	56 ms	62984 KB	Output is correct
11	Correct	58 ms	62968 KB	Output is correct
12	Correct	56 ms	62968 KB	Output is correct
13	Correct	56 ms	62940 KB	Output is correct
14	Correct	56 ms	62968 KB	Output is correct
15	Correct	56 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	57 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	60 ms	63096 KB	Output is correct
20	Correct	57 ms	63004 KB	Output is correct
21	Correct	57 ms	62968 KB	Output is correct
22	Correct	57 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	57 ms	63140 KB	Output is correct
25	Correct	58 ms	62996 KB	Output is correct
26	Correct	69 ms	63228 KB	Output is correct
27	Correct	68 ms	63200 KB	Output is correct
28	Correct	69 ms	63352 KB	Output is correct
29	Correct	60 ms	63352 KB	Output is correct
30	Correct	59 ms	63224 KB	Output is correct
31	Correct	57 ms	62968 KB	Output is correct
32	Correct	60 ms	63480 KB	Output is correct
33	Correct	57 ms	62952 KB	Output is correct
34	Correct	59 ms	63224 KB	Output is correct
35	Correct	59 ms	63352 KB	Output is correct
36	Correct	59 ms	63224 KB	Output is correct
37	Correct	59 ms	63224 KB	Output is correct
38	Correct	57 ms	62968 KB	Output is correct
39	Correct	59 ms	63224 KB	Output is correct
40	Correct	59 ms	63224 KB	Output is correct
41	Correct	59 ms	63248 KB	Output is correct
42	Correct	59 ms	63224 KB	Output is correct
43	Correct	61 ms	63324 KB	Output is correct
44	Correct	68 ms	63064 KB	Output is correct
45	Correct	63 ms	63480 KB	Output is correct
46	Correct	60 ms	63252 KB	Output is correct
47	Correct	57 ms	62996 KB	Output is correct
48	Correct	66 ms	63256 KB	Output is correct
49	Correct	59 ms	63352 KB	Output is correct
50	Correct	60 ms	63352 KB	Output is correct
51	Correct	59 ms	63224 KB	Output is correct
52	Correct	68 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	59 ms	63200 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	63228 KB	Output is correct
2	Correct	57 ms	62968 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	63 ms	63056 KB	Output is correct
5	Correct	57 ms	63096 KB	Output is correct
6	Correct	58 ms	63096 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	57 ms	62968 KB	Output is correct
9	Correct	57 ms	62968 KB	Output is correct
10	Correct	56 ms	62984 KB	Output is correct
11	Correct	58 ms	62968 KB	Output is correct
12	Correct	56 ms	62968 KB	Output is correct
13	Correct	56 ms	62940 KB	Output is correct
14	Correct	56 ms	62968 KB	Output is correct
15	Correct	56 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	57 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	60 ms	63096 KB	Output is correct
20	Correct	57 ms	63004 KB	Output is correct
21	Correct	57 ms	62968 KB	Output is correct
22	Correct	57 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	57 ms	63140 KB	Output is correct
25	Correct	56 ms	63096 KB	Output is correct
26	Correct	139 ms	69060 KB	Output is correct
27	Correct	210 ms	69112 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	57 ms	63096 KB	Output is correct
30	Correct	60 ms	62988 KB	Output is correct
31	Correct	172 ms	69244 KB	Output is correct
32	Correct	69 ms	63224 KB	Output is correct
33	Correct	232 ms	74716 KB	Output is correct
34	Correct	172 ms	69156 KB	Output is correct
35	Correct	59 ms	63196 KB	Output is correct
36	Correct	208 ms	69904 KB	Output is correct
37	Correct	62 ms	63308 KB	Output is correct
38	Correct	59 ms	63224 KB	Output is correct
39	Correct	148 ms	69104 KB	Output is correct
40	Correct	62 ms	63404 KB	Output is correct
41	Correct	150 ms	68672 KB	Output is correct
42	Correct	215 ms	70848 KB	Output is correct
43	Correct	64 ms	62960 KB	Output is correct
44	Correct	242 ms	74656 KB	Output is correct
45	Correct	204 ms	72056 KB	Output is correct
46	Correct	69 ms	63248 KB	Output is correct
47	Correct	70 ms	63224 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	146 ms	68872 KB	Output is correct
2	Correct	164 ms	72688 KB	Output is correct
3	Correct	70 ms	63224 KB	Output is correct
4	Correct	59 ms	63224 KB	Output is correct
5	Correct	58 ms	62968 KB	Output is correct
6	Correct	61 ms	62932 KB	Output is correct
7	Correct	69 ms	63228 KB	Output is correct
8	Correct	223 ms	71044 KB	Output is correct
9	Correct	59 ms	63224 KB	Output is correct
10	Correct	168 ms	69852 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	214 ms	70024 KB	Output is correct
13	Correct	225 ms	70936 KB	Output is correct
14	Correct	191 ms	72440 KB	Output is correct
15	Correct	161 ms	69012 KB	Output is correct
16	Correct	59 ms	63176 KB	Output is correct
17	Correct	57 ms	62972 KB	Output is correct
18	Correct	167 ms	72552 KB	Output is correct
19	Correct	245 ms	75556 KB	Output is correct
20	Correct	59 ms	63356 KB	Output is correct
21	Correct	57 ms	62968 KB	Output is correct
22	Correct	160 ms	71292 KB	Output is correct
23	Correct	60 ms	63224 KB	Output is correct
24	Correct	203 ms	70108 KB	Output is correct
25	Correct	211 ms	74488 KB	Output is correct
26	Correct	59 ms	63324 KB	Output is correct
27	Correct	60 ms	63352 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	59 ms	63224 KB	Output is correct
30	Correct	59 ms	63268 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	63228 KB	Output is correct
2	Correct	57 ms	62968 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	63 ms	63056 KB	Output is correct
5	Correct	57 ms	63096 KB	Output is correct
6	Correct	58 ms	63096 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	57 ms	62968 KB	Output is correct
9	Correct	57 ms	62968 KB	Output is correct
10	Correct	56 ms	62984 KB	Output is correct
11	Correct	58 ms	62968 KB	Output is correct
12	Correct	56 ms	62968 KB	Output is correct
13	Correct	56 ms	62940 KB	Output is correct
14	Correct	56 ms	62968 KB	Output is correct
15	Correct	56 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	57 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	60 ms	63096 KB	Output is correct
20	Correct	57 ms	63004 KB	Output is correct
21	Correct	57 ms	62968 KB	Output is correct
22	Correct	57 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	57 ms	63140 KB	Output is correct
25	Correct	58 ms	62996 KB	Output is correct
26	Correct	69 ms	63228 KB	Output is correct
27	Correct	68 ms	63200 KB	Output is correct
28	Correct	69 ms	63352 KB	Output is correct
29	Correct	60 ms	63352 KB	Output is correct
30	Correct	59 ms	63224 KB	Output is correct
31	Correct	57 ms	62968 KB	Output is correct
32	Correct	60 ms	63480 KB	Output is correct
33	Correct	57 ms	62952 KB	Output is correct
34	Correct	59 ms	63224 KB	Output is correct
35	Correct	59 ms	63352 KB	Output is correct
36	Correct	59 ms	63224 KB	Output is correct
37	Correct	59 ms	63224 KB	Output is correct
38	Correct	57 ms	62968 KB	Output is correct
39	Correct	59 ms	63224 KB	Output is correct
40	Correct	59 ms	63224 KB	Output is correct
41	Correct	59 ms	63248 KB	Output is correct
42	Correct	59 ms	63224 KB	Output is correct
43	Correct	61 ms	63324 KB	Output is correct
44	Correct	68 ms	63064 KB	Output is correct
45	Correct	63 ms	63480 KB	Output is correct
46	Correct	60 ms	63252 KB	Output is correct
47	Correct	57 ms	62996 KB	Output is correct
48	Correct	66 ms	63256 KB	Output is correct
49	Correct	59 ms	63352 KB	Output is correct
50	Correct	60 ms	63352 KB	Output is correct
51	Correct	59 ms	63224 KB	Output is correct
52	Correct	68 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	59 ms	63200 KB	Output is correct
55	Correct	56 ms	63096 KB	Output is correct
56	Correct	139 ms	69060 KB	Output is correct
57	Correct	210 ms	69112 KB	Output is correct
58	Correct	59 ms	63224 KB	Output is correct
59	Correct	57 ms	63096 KB	Output is correct
60	Correct	60 ms	62988 KB	Output is correct
61	Correct	172 ms	69244 KB	Output is correct
62	Correct	69 ms	63224 KB	Output is correct
63	Correct	232 ms	74716 KB	Output is correct
64	Correct	172 ms	69156 KB	Output is correct
65	Correct	59 ms	63196 KB	Output is correct
66	Correct	208 ms	69904 KB	Output is correct
67	Correct	62 ms	63308 KB	Output is correct
68	Correct	59 ms	63224 KB	Output is correct
69	Correct	148 ms	69104 KB	Output is correct
70	Correct	62 ms	63404 KB	Output is correct
71	Correct	150 ms	68672 KB	Output is correct
72	Correct	215 ms	70848 KB	Output is correct
73	Correct	64 ms	62960 KB	Output is correct
74	Correct	242 ms	74656 KB	Output is correct
75	Correct	204 ms	72056 KB	Output is correct
76	Correct	69 ms	63248 KB	Output is correct
77	Correct	70 ms	63224 KB	Output is correct
78	Correct	146 ms	68872 KB	Output is correct
79	Correct	164 ms	72688 KB	Output is correct
80	Correct	70 ms	63224 KB	Output is correct
81	Correct	59 ms	63224 KB	Output is correct
82	Correct	58 ms	62968 KB	Output is correct
83	Correct	61 ms	62932 KB	Output is correct
84	Correct	69 ms	63228 KB	Output is correct
85	Correct	223 ms	71044 KB	Output is correct
86	Correct	59 ms	63224 KB	Output is correct
87	Correct	168 ms	69852 KB	Output is correct
88	Correct	57 ms	62968 KB	Output is correct
89	Correct	214 ms	70024 KB	Output is correct
90	Correct	225 ms	70936 KB	Output is correct
91	Correct	191 ms	72440 KB	Output is correct
92	Correct	161 ms	69012 KB	Output is correct
93	Correct	59 ms	63176 KB	Output is correct
94	Correct	57 ms	62972 KB	Output is correct
95	Correct	167 ms	72552 KB	Output is correct
96	Correct	245 ms	75556 KB	Output is correct
97	Correct	59 ms	63356 KB	Output is correct
98	Correct	57 ms	62968 KB	Output is correct
99	Correct	160 ms	71292 KB	Output is correct
100	Correct	60 ms	63224 KB	Output is correct
101	Correct	203 ms	70108 KB	Output is correct
102	Correct	211 ms	74488 KB	Output is correct
103	Correct	59 ms	63324 KB	Output is correct
104	Correct	60 ms	63352 KB	Output is correct
105	Correct	59 ms	63224 KB	Output is correct
106	Correct	59 ms	63224 KB	Output is correct
107	Correct	59 ms	63268 KB	Output is correct
108	Correct	794 ms	99972 KB	Output is correct
109	Correct	1332 ms	104676 KB	Output is correct
110	Correct	1067 ms	111724 KB	Output is correct
111	Correct	1476 ms	126176 KB	Output is correct
112	Correct	1411 ms	118412 KB	Output is correct
113	Correct	866 ms	107724 KB	Output is correct
114	Incorrect	879 ms	90388 KB	Output isn't correct
115	Halted	0 ms	0 KB	-

답안 #138103

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 22.0 / 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
22.0 / 22.0

Subtask #5
0 / 30.0