답안 #138132

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138132	2019-07-29T11:56:09 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	799 ms	99080 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] && mark[last]) 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] += (int)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	57 ms	62968 KB	Output is correct
2	Correct	57 ms	62940 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62972 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	63020 KB	Output is correct
9	Correct	56 ms	63044 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	72 ms	63108 KB	Output is correct
12	Correct	58 ms	63068 KB	Output is correct
13	Correct	57 ms	62924 KB	Output is correct
14	Correct	57 ms	63016 KB	Output is correct
15	Correct	57 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	62 ms	62980 KB	Output is correct
18	Correct	68 ms	62972 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	64 ms	63096 KB	Output is correct
21	Correct	73 ms	62940 KB	Output is correct
22	Correct	69 ms	63028 KB	Output is correct
23	Correct	68 ms	62940 KB	Output is correct
24	Correct	67 ms	62940 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	62968 KB	Output is correct
2	Correct	57 ms	62940 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62972 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	63020 KB	Output is correct
9	Correct	56 ms	63044 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	72 ms	63108 KB	Output is correct
12	Correct	58 ms	63068 KB	Output is correct
13	Correct	57 ms	62924 KB	Output is correct
14	Correct	57 ms	63016 KB	Output is correct
15	Correct	57 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	62 ms	62980 KB	Output is correct
18	Correct	68 ms	62972 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	64 ms	63096 KB	Output is correct
21	Correct	73 ms	62940 KB	Output is correct
22	Correct	69 ms	63028 KB	Output is correct
23	Correct	68 ms	62940 KB	Output is correct
24	Correct	67 ms	62940 KB	Output is correct
25	Correct	63 ms	63024 KB	Output is correct
26	Correct	59 ms	63224 KB	Output is correct
27	Correct	59 ms	63196 KB	Output is correct
28	Correct	60 ms	63352 KB	Output is correct
29	Correct	59 ms	63224 KB	Output is correct
30	Correct	60 ms	63212 KB	Output is correct
31	Correct	57 ms	62964 KB	Output is correct
32	Correct	59 ms	63480 KB	Output is correct
33	Correct	57 ms	62968 KB	Output is correct
34	Correct	59 ms	63228 KB	Output is correct
35	Correct	60 ms	63352 KB	Output is correct
36	Correct	59 ms	63208 KB	Output is correct
37	Correct	66 ms	63248 KB	Output is correct
38	Correct	57 ms	62972 KB	Output is correct
39	Correct	65 ms	63252 KB	Output is correct
40	Correct	63 ms	63224 KB	Output is correct
41	Correct	66 ms	63228 KB	Output is correct
42	Correct	59 ms	63352 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	68 ms	62968 KB	Output is correct
45	Correct	59 ms	63352 KB	Output is correct
46	Correct	60 ms	63228 KB	Output is correct
47	Correct	61 ms	62968 KB	Output is correct
48	Correct	70 ms	63188 KB	Output is correct
49	Correct	61 ms	63352 KB	Output is correct
50	Correct	63 ms	63352 KB	Output is correct
51	Correct	59 ms	63224 KB	Output is correct
52	Correct	58 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	61 ms	63224 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	62968 KB	Output is correct
2	Correct	57 ms	62940 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62972 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	63020 KB	Output is correct
9	Correct	56 ms	63044 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	72 ms	63108 KB	Output is correct
12	Correct	58 ms	63068 KB	Output is correct
13	Correct	57 ms	62924 KB	Output is correct
14	Correct	57 ms	63016 KB	Output is correct
15	Correct	57 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	62 ms	62980 KB	Output is correct
18	Correct	68 ms	62972 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	64 ms	63096 KB	Output is correct
21	Correct	73 ms	62940 KB	Output is correct
22	Correct	69 ms	63028 KB	Output is correct
23	Correct	68 ms	62940 KB	Output is correct
24	Correct	67 ms	62940 KB	Output is correct
25	Correct	68 ms	62992 KB	Output is correct
26	Correct	169 ms	69596 KB	Output is correct
27	Correct	251 ms	69624 KB	Output is correct
28	Correct	60 ms	63224 KB	Output is correct
29	Correct	57 ms	62968 KB	Output is correct
30	Correct	57 ms	63080 KB	Output is correct
31	Correct	179 ms	69872 KB	Output is correct
32	Correct	59 ms	63224 KB	Output is correct
33	Correct	235 ms	75256 KB	Output is correct
34	Correct	174 ms	69660 KB	Output is correct
35	Correct	59 ms	63196 KB	Output is correct
36	Correct	209 ms	70396 KB	Output is correct
37	Correct	59 ms	63224 KB	Output is correct
38	Correct	59 ms	63148 KB	Output is correct
39	Correct	138 ms	69460 KB	Output is correct
40	Correct	60 ms	63424 KB	Output is correct
41	Correct	169 ms	69712 KB	Output is correct
42	Correct	230 ms	71524 KB	Output is correct
43	Correct	57 ms	62968 KB	Output is correct
44	Correct	269 ms	75720 KB	Output is correct
45	Correct	211 ms	72636 KB	Output is correct
46	Correct	59 ms	63204 KB	Output is correct
47	Correct	59 ms	63224 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	136 ms	69484 KB	Output is correct
2	Correct	177 ms	73300 KB	Output is correct
3	Correct	61 ms	63224 KB	Output is correct
4	Correct	64 ms	63340 KB	Output is correct
5	Correct	65 ms	62968 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	59 ms	63196 KB	Output is correct
8	Correct	230 ms	71436 KB	Output is correct
9	Correct	60 ms	63224 KB	Output is correct
10	Correct	185 ms	70460 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	210 ms	70364 KB	Output is correct
13	Correct	265 ms	71416 KB	Output is correct
14	Correct	248 ms	73052 KB	Output is correct
15	Correct	174 ms	69392 KB	Output is correct
16	Correct	60 ms	63316 KB	Output is correct
17	Correct	58 ms	63064 KB	Output is correct
18	Correct	207 ms	73044 KB	Output is correct
19	Correct	230 ms	76116 KB	Output is correct
20	Correct	59 ms	63352 KB	Output is correct
21	Correct	57 ms	63096 KB	Output is correct
22	Correct	168 ms	71832 KB	Output is correct
23	Correct	60 ms	63224 KB	Output is correct
24	Correct	275 ms	70648 KB	Output is correct
25	Correct	280 ms	74980 KB	Output is correct
26	Correct	59 ms	63352 KB	Output is correct
27	Correct	70 ms	63352 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	69 ms	63260 KB	Output is correct
30	Correct	76 ms	63236 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	62968 KB	Output is correct
2	Correct	57 ms	62940 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	56 ms	62968 KB	Output is correct
6	Correct	56 ms	62972 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	63020 KB	Output is correct
9	Correct	56 ms	63044 KB	Output is correct
10	Correct	57 ms	62968 KB	Output is correct
11	Correct	72 ms	63108 KB	Output is correct
12	Correct	58 ms	63068 KB	Output is correct
13	Correct	57 ms	62924 KB	Output is correct
14	Correct	57 ms	63016 KB	Output is correct
15	Correct	57 ms	62940 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	62 ms	62980 KB	Output is correct
18	Correct	68 ms	62972 KB	Output is correct
19	Correct	57 ms	62968 KB	Output is correct
20	Correct	64 ms	63096 KB	Output is correct
21	Correct	73 ms	62940 KB	Output is correct
22	Correct	69 ms	63028 KB	Output is correct
23	Correct	68 ms	62940 KB	Output is correct
24	Correct	67 ms	62940 KB	Output is correct
25	Correct	63 ms	63024 KB	Output is correct
26	Correct	59 ms	63224 KB	Output is correct
27	Correct	59 ms	63196 KB	Output is correct
28	Correct	60 ms	63352 KB	Output is correct
29	Correct	59 ms	63224 KB	Output is correct
30	Correct	60 ms	63212 KB	Output is correct
31	Correct	57 ms	62964 KB	Output is correct
32	Correct	59 ms	63480 KB	Output is correct
33	Correct	57 ms	62968 KB	Output is correct
34	Correct	59 ms	63228 KB	Output is correct
35	Correct	60 ms	63352 KB	Output is correct
36	Correct	59 ms	63208 KB	Output is correct
37	Correct	66 ms	63248 KB	Output is correct
38	Correct	57 ms	62972 KB	Output is correct
39	Correct	65 ms	63252 KB	Output is correct
40	Correct	63 ms	63224 KB	Output is correct
41	Correct	66 ms	63228 KB	Output is correct
42	Correct	59 ms	63352 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	68 ms	62968 KB	Output is correct
45	Correct	59 ms	63352 KB	Output is correct
46	Correct	60 ms	63228 KB	Output is correct
47	Correct	61 ms	62968 KB	Output is correct
48	Correct	70 ms	63188 KB	Output is correct
49	Correct	61 ms	63352 KB	Output is correct
50	Correct	63 ms	63352 KB	Output is correct
51	Correct	59 ms	63224 KB	Output is correct
52	Correct	58 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	61 ms	63224 KB	Output is correct
55	Correct	68 ms	62992 KB	Output is correct
56	Correct	169 ms	69596 KB	Output is correct
57	Correct	251 ms	69624 KB	Output is correct
58	Correct	60 ms	63224 KB	Output is correct
59	Correct	57 ms	62968 KB	Output is correct
60	Correct	57 ms	63080 KB	Output is correct
61	Correct	179 ms	69872 KB	Output is correct
62	Correct	59 ms	63224 KB	Output is correct
63	Correct	235 ms	75256 KB	Output is correct
64	Correct	174 ms	69660 KB	Output is correct
65	Correct	59 ms	63196 KB	Output is correct
66	Correct	209 ms	70396 KB	Output is correct
67	Correct	59 ms	63224 KB	Output is correct
68	Correct	59 ms	63148 KB	Output is correct
69	Correct	138 ms	69460 KB	Output is correct
70	Correct	60 ms	63424 KB	Output is correct
71	Correct	169 ms	69712 KB	Output is correct
72	Correct	230 ms	71524 KB	Output is correct
73	Correct	57 ms	62968 KB	Output is correct
74	Correct	269 ms	75720 KB	Output is correct
75	Correct	211 ms	72636 KB	Output is correct
76	Correct	59 ms	63204 KB	Output is correct
77	Correct	59 ms	63224 KB	Output is correct
78	Correct	136 ms	69484 KB	Output is correct
79	Correct	177 ms	73300 KB	Output is correct
80	Correct	61 ms	63224 KB	Output is correct
81	Correct	64 ms	63340 KB	Output is correct
82	Correct	65 ms	62968 KB	Output is correct
83	Correct	57 ms	62968 KB	Output is correct
84	Correct	59 ms	63196 KB	Output is correct
85	Correct	230 ms	71436 KB	Output is correct
86	Correct	60 ms	63224 KB	Output is correct
87	Correct	185 ms	70460 KB	Output is correct
88	Correct	57 ms	62968 KB	Output is correct
89	Correct	210 ms	70364 KB	Output is correct
90	Correct	265 ms	71416 KB	Output is correct
91	Correct	248 ms	73052 KB	Output is correct
92	Correct	174 ms	69392 KB	Output is correct
93	Correct	60 ms	63316 KB	Output is correct
94	Correct	58 ms	63064 KB	Output is correct
95	Correct	207 ms	73044 KB	Output is correct
96	Correct	230 ms	76116 KB	Output is correct
97	Correct	59 ms	63352 KB	Output is correct
98	Correct	57 ms	63096 KB	Output is correct
99	Correct	168 ms	71832 KB	Output is correct
100	Correct	60 ms	63224 KB	Output is correct
101	Correct	275 ms	70648 KB	Output is correct
102	Correct	280 ms	74980 KB	Output is correct
103	Correct	59 ms	63352 KB	Output is correct
104	Correct	70 ms	63352 KB	Output is correct
105	Correct	59 ms	63224 KB	Output is correct
106	Correct	69 ms	63260 KB	Output is correct
107	Correct	76 ms	63236 KB	Output is correct
108	Incorrect	799 ms	99080 KB	Output isn't correct
109	Halted	0 ms	0 KB	-

답안 #138132

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