답안 #138126

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138126	2019-07-29T11:53:06 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	1518 ms	130556 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], 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)
{
	for(int v : adj[u]) if(p != v)
	{
		if(mark[v]) deg[v]++, deg[last]++, DFS(v, u, v);
		else 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();
	}
	calc(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:46:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:49:21: 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:50:44: 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	67 ms	62968 KB	Output is correct
2	Correct	57 ms	63056 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62960 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	57 ms	63096 KB	Output is correct
8	Correct	57 ms	63096 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	63 ms	62988 KB	Output is correct
13	Correct	71 ms	62968 KB	Output is correct
14	Correct	57 ms	63096 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	56 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	57 ms	62968 KB	Output is correct
21	Correct	55 ms	62968 KB	Output is correct
22	Correct	57 ms	63096 KB	Output is correct
23	Correct	57 ms	63012 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	67 ms	62968 KB	Output is correct
2	Correct	57 ms	63056 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62960 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	57 ms	63096 KB	Output is correct
8	Correct	57 ms	63096 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	63 ms	62988 KB	Output is correct
13	Correct	71 ms	62968 KB	Output is correct
14	Correct	57 ms	63096 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	56 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	57 ms	62968 KB	Output is correct
21	Correct	55 ms	62968 KB	Output is correct
22	Correct	57 ms	63096 KB	Output is correct
23	Correct	57 ms	63012 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	63032 KB	Output is correct
26	Correct	59 ms	63224 KB	Output is correct
27	Correct	70 ms	63196 KB	Output is correct
28	Correct	60 ms	63392 KB	Output is correct
29	Correct	59 ms	63224 KB	Output is correct
30	Correct	59 ms	63228 KB	Output is correct
31	Correct	56 ms	62968 KB	Output is correct
32	Correct	60 ms	63480 KB	Output is correct
33	Correct	56 ms	62968 KB	Output is correct
34	Correct	58 ms	63224 KB	Output is correct
35	Correct	59 ms	63224 KB	Output is correct
36	Correct	59 ms	63224 KB	Output is correct
37	Correct	60 ms	63260 KB	Output is correct
38	Correct	57 ms	62968 KB	Output is correct
39	Correct	59 ms	63224 KB	Output is correct
40	Correct	60 ms	63224 KB	Output is correct
41	Correct	62 ms	63224 KB	Output is correct
42	Correct	59 ms	63268 KB	Output is correct
43	Correct	70 ms	63352 KB	Output is correct
44	Correct	69 ms	62940 KB	Output is correct
45	Correct	64 ms	63324 KB	Output is correct
46	Correct	65 ms	63324 KB	Output is correct
47	Correct	66 ms	62940 KB	Output is correct
48	Correct	61 ms	63224 KB	Output is correct
49	Correct	59 ms	63304 KB	Output is correct
50	Correct	59 ms	63372 KB	Output is correct
51	Correct	59 ms	63248 KB	Output is correct
52	Correct	59 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	59 ms	63224 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	67 ms	62968 KB	Output is correct
2	Correct	57 ms	63056 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62960 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	57 ms	63096 KB	Output is correct
8	Correct	57 ms	63096 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	63 ms	62988 KB	Output is correct
13	Correct	71 ms	62968 KB	Output is correct
14	Correct	57 ms	63096 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	56 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	57 ms	62968 KB	Output is correct
21	Correct	55 ms	62968 KB	Output is correct
22	Correct	57 ms	63096 KB	Output is correct
23	Correct	57 ms	63012 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	62968 KB	Output is correct
26	Correct	140 ms	69740 KB	Output is correct
27	Correct	178 ms	69872 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	57 ms	63096 KB	Output is correct
30	Correct	68 ms	62972 KB	Output is correct
31	Correct	173 ms	69992 KB	Output is correct
32	Correct	59 ms	63260 KB	Output is correct
33	Correct	231 ms	75564 KB	Output is correct
34	Correct	174 ms	69880 KB	Output is correct
35	Correct	59 ms	63224 KB	Output is correct
36	Correct	215 ms	70484 KB	Output is correct
37	Correct	59 ms	63352 KB	Output is correct
38	Correct	59 ms	63224 KB	Output is correct
39	Correct	143 ms	69528 KB	Output is correct
40	Correct	60 ms	63416 KB	Output is correct
41	Correct	165 ms	69648 KB	Output is correct
42	Correct	206 ms	71596 KB	Output is correct
43	Correct	57 ms	62968 KB	Output is correct
44	Correct	249 ms	75720 KB	Output is correct
45	Correct	202 ms	72824 KB	Output is correct
46	Correct	59 ms	63140 KB	Output is correct
47	Correct	59 ms	63228 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	138 ms	69744 KB	Output is correct
2	Correct	167 ms	73856 KB	Output is correct
3	Correct	59 ms	63212 KB	Output is correct
4	Correct	59 ms	63224 KB	Output is correct
5	Correct	57 ms	62976 KB	Output is correct
6	Correct	57 ms	63028 KB	Output is correct
7	Correct	58 ms	63224 KB	Output is correct
8	Correct	207 ms	71944 KB	Output is correct
9	Correct	66 ms	63224 KB	Output is correct
10	Correct	169 ms	70648 KB	Output is correct
11	Correct	73 ms	62968 KB	Output is correct
12	Correct	214 ms	70572 KB	Output is correct
13	Correct	232 ms	71964 KB	Output is correct
14	Correct	211 ms	73460 KB	Output is correct
15	Correct	137 ms	69616 KB	Output is correct
16	Correct	66 ms	63284 KB	Output is correct
17	Correct	58 ms	63068 KB	Output is correct
18	Correct	221 ms	73456 KB	Output is correct
19	Correct	324 ms	76532 KB	Output is correct
20	Correct	59 ms	63224 KB	Output is correct
21	Correct	57 ms	63096 KB	Output is correct
22	Correct	164 ms	72048 KB	Output is correct
23	Correct	59 ms	63240 KB	Output is correct
24	Correct	218 ms	71208 KB	Output is correct
25	Correct	223 ms	75440 KB	Output is correct
26	Correct	69 ms	63324 KB	Output is correct
27	Correct	59 ms	63416 KB	Output is correct
28	Correct	60 ms	63276 KB	Output is correct
29	Correct	58 ms	63152 KB	Output is correct
30	Correct	59 ms	63352 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	67 ms	62968 KB	Output is correct
2	Correct	57 ms	63056 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62960 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	57 ms	63096 KB	Output is correct
8	Correct	57 ms	63096 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	63 ms	62988 KB	Output is correct
13	Correct	71 ms	62968 KB	Output is correct
14	Correct	57 ms	63096 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	56 ms	62968 KB	Output is correct
18	Correct	57 ms	62968 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	57 ms	62968 KB	Output is correct
21	Correct	55 ms	62968 KB	Output is correct
22	Correct	57 ms	63096 KB	Output is correct
23	Correct	57 ms	63012 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	63032 KB	Output is correct
26	Correct	59 ms	63224 KB	Output is correct
27	Correct	70 ms	63196 KB	Output is correct
28	Correct	60 ms	63392 KB	Output is correct
29	Correct	59 ms	63224 KB	Output is correct
30	Correct	59 ms	63228 KB	Output is correct
31	Correct	56 ms	62968 KB	Output is correct
32	Correct	60 ms	63480 KB	Output is correct
33	Correct	56 ms	62968 KB	Output is correct
34	Correct	58 ms	63224 KB	Output is correct
35	Correct	59 ms	63224 KB	Output is correct
36	Correct	59 ms	63224 KB	Output is correct
37	Correct	60 ms	63260 KB	Output is correct
38	Correct	57 ms	62968 KB	Output is correct
39	Correct	59 ms	63224 KB	Output is correct
40	Correct	60 ms	63224 KB	Output is correct
41	Correct	62 ms	63224 KB	Output is correct
42	Correct	59 ms	63268 KB	Output is correct
43	Correct	70 ms	63352 KB	Output is correct
44	Correct	69 ms	62940 KB	Output is correct
45	Correct	64 ms	63324 KB	Output is correct
46	Correct	65 ms	63324 KB	Output is correct
47	Correct	66 ms	62940 KB	Output is correct
48	Correct	61 ms	63224 KB	Output is correct
49	Correct	59 ms	63304 KB	Output is correct
50	Correct	59 ms	63372 KB	Output is correct
51	Correct	59 ms	63248 KB	Output is correct
52	Correct	59 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	59 ms	63224 KB	Output is correct
55	Correct	57 ms	62968 KB	Output is correct
56	Correct	140 ms	69740 KB	Output is correct
57	Correct	178 ms	69872 KB	Output is correct
58	Correct	59 ms	63224 KB	Output is correct
59	Correct	57 ms	63096 KB	Output is correct
60	Correct	68 ms	62972 KB	Output is correct
61	Correct	173 ms	69992 KB	Output is correct
62	Correct	59 ms	63260 KB	Output is correct
63	Correct	231 ms	75564 KB	Output is correct
64	Correct	174 ms	69880 KB	Output is correct
65	Correct	59 ms	63224 KB	Output is correct
66	Correct	215 ms	70484 KB	Output is correct
67	Correct	59 ms	63352 KB	Output is correct
68	Correct	59 ms	63224 KB	Output is correct
69	Correct	143 ms	69528 KB	Output is correct
70	Correct	60 ms	63416 KB	Output is correct
71	Correct	165 ms	69648 KB	Output is correct
72	Correct	206 ms	71596 KB	Output is correct
73	Correct	57 ms	62968 KB	Output is correct
74	Correct	249 ms	75720 KB	Output is correct
75	Correct	202 ms	72824 KB	Output is correct
76	Correct	59 ms	63140 KB	Output is correct
77	Correct	59 ms	63228 KB	Output is correct
78	Correct	138 ms	69744 KB	Output is correct
79	Correct	167 ms	73856 KB	Output is correct
80	Correct	59 ms	63212 KB	Output is correct
81	Correct	59 ms	63224 KB	Output is correct
82	Correct	57 ms	62976 KB	Output is correct
83	Correct	57 ms	63028 KB	Output is correct
84	Correct	58 ms	63224 KB	Output is correct
85	Correct	207 ms	71944 KB	Output is correct
86	Correct	66 ms	63224 KB	Output is correct
87	Correct	169 ms	70648 KB	Output is correct
88	Correct	73 ms	62968 KB	Output is correct
89	Correct	214 ms	70572 KB	Output is correct
90	Correct	232 ms	71964 KB	Output is correct
91	Correct	211 ms	73460 KB	Output is correct
92	Correct	137 ms	69616 KB	Output is correct
93	Correct	66 ms	63284 KB	Output is correct
94	Correct	58 ms	63068 KB	Output is correct
95	Correct	221 ms	73456 KB	Output is correct
96	Correct	324 ms	76532 KB	Output is correct
97	Correct	59 ms	63224 KB	Output is correct
98	Correct	57 ms	63096 KB	Output is correct
99	Correct	164 ms	72048 KB	Output is correct
100	Correct	59 ms	63240 KB	Output is correct
101	Correct	218 ms	71208 KB	Output is correct
102	Correct	223 ms	75440 KB	Output is correct
103	Correct	69 ms	63324 KB	Output is correct
104	Correct	59 ms	63416 KB	Output is correct
105	Correct	60 ms	63276 KB	Output is correct
106	Correct	58 ms	63152 KB	Output is correct
107	Correct	59 ms	63352 KB	Output is correct
108	Correct	823 ms	103836 KB	Output is correct
109	Correct	1310 ms	108908 KB	Output is correct
110	Correct	1435 ms	118248 KB	Output is correct
111	Correct	1518 ms	130556 KB	Output is correct
112	Correct	1355 ms	122748 KB	Output is correct
113	Correct	849 ms	112136 KB	Output is correct
114	Incorrect	892 ms	95092 KB	Output isn't correct
115	Halted	0 ms	0 KB	-

답안 #138126

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