답안 #138105

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138105	2019-07-29T10:59:06 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	1453 ms	125048 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)
{
	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();
	}
	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: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	57 ms	62972 KB	Output is correct
2	Correct	56 ms	62968 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	58 ms	62968 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	56 ms	63008 KB	Output is correct
9	Correct	57 ms	62976 KB	Output is correct
10	Correct	56 ms	62968 KB	Output is correct
11	Correct	57 ms	63100 KB	Output is correct
12	Correct	57 ms	62932 KB	Output is correct
13	Correct	56 ms	62968 KB	Output is correct
14	Correct	57 ms	62968 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	58 ms	62952 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	57 ms	63016 KB	Output is correct
22	Correct	56 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 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	57 ms	62972 KB	Output is correct
2	Correct	56 ms	62968 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	58 ms	62968 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	56 ms	63008 KB	Output is correct
9	Correct	57 ms	62976 KB	Output is correct
10	Correct	56 ms	62968 KB	Output is correct
11	Correct	57 ms	63100 KB	Output is correct
12	Correct	57 ms	62932 KB	Output is correct
13	Correct	56 ms	62968 KB	Output is correct
14	Correct	57 ms	62968 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	58 ms	62952 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	57 ms	63016 KB	Output is correct
22	Correct	56 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	62996 KB	Output is correct
26	Correct	69 ms	63224 KB	Output is correct
27	Correct	68 ms	63196 KB	Output is correct
28	Correct	117 ms	63352 KB	Output is correct
29	Correct	61 ms	63280 KB	Output is correct
30	Correct	60 ms	63096 KB	Output is correct
31	Correct	57 ms	62968 KB	Output is correct
32	Correct	60 ms	63352 KB	Output is correct
33	Correct	57 ms	63016 KB	Output is correct
34	Correct	58 ms	63196 KB	Output is correct
35	Correct	58 ms	63224 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	58 ms	63224 KB	Output is correct
41	Correct	64 ms	63224 KB	Output is correct
42	Correct	62 ms	63224 KB	Output is correct
43	Correct	65 ms	63340 KB	Output is correct
44	Correct	62 ms	62968 KB	Output is correct
45	Correct	59 ms	63316 KB	Output is correct
46	Correct	59 ms	63228 KB	Output is correct
47	Correct	56 ms	62968 KB	Output is correct
48	Correct	60 ms	63224 KB	Output is correct
49	Correct	59 ms	63224 KB	Output is correct
50	Correct	61 ms	63392 KB	Output is correct
51	Correct	60 ms	63352 KB	Output is correct
52	Correct	58 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	58 ms	63096 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	62972 KB	Output is correct
2	Correct	56 ms	62968 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	58 ms	62968 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	56 ms	63008 KB	Output is correct
9	Correct	57 ms	62976 KB	Output is correct
10	Correct	56 ms	62968 KB	Output is correct
11	Correct	57 ms	63100 KB	Output is correct
12	Correct	57 ms	62932 KB	Output is correct
13	Correct	56 ms	62968 KB	Output is correct
14	Correct	57 ms	62968 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	58 ms	62952 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	57 ms	63016 KB	Output is correct
22	Correct	56 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	62940 KB	Output is correct
26	Correct	138 ms	68304 KB	Output is correct
27	Correct	168 ms	68452 KB	Output is correct
28	Correct	60 ms	63352 KB	Output is correct
29	Correct	57 ms	62944 KB	Output is correct
30	Correct	57 ms	62968 KB	Output is correct
31	Correct	172 ms	68572 KB	Output is correct
32	Correct	58 ms	63196 KB	Output is correct
33	Correct	214 ms	74152 KB	Output is correct
34	Correct	176 ms	68344 KB	Output is correct
35	Correct	58 ms	63224 KB	Output is correct
36	Correct	213 ms	69112 KB	Output is correct
37	Correct	59 ms	63096 KB	Output is correct
38	Correct	59 ms	63352 KB	Output is correct
39	Correct	139 ms	68336 KB	Output is correct
40	Correct	59 ms	63356 KB	Output is correct
41	Correct	174 ms	68340 KB	Output is correct
42	Correct	287 ms	70116 KB	Output is correct
43	Correct	66 ms	62968 KB	Output is correct
44	Correct	298 ms	74196 KB	Output is correct
45	Correct	206 ms	71416 KB	Output is correct
46	Correct	59 ms	63128 KB	Output is correct
47	Correct	59 ms	63128 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	142 ms	68204 KB	Output is correct
2	Correct	177 ms	72048 KB	Output is correct
3	Correct	70 ms	63228 KB	Output is correct
4	Correct	60 ms	63224 KB	Output is correct
5	Correct	58 ms	63096 KB	Output is correct
6	Correct	57 ms	63096 KB	Output is correct
7	Correct	59 ms	63228 KB	Output is correct
8	Correct	205 ms	70136 KB	Output is correct
9	Correct	59 ms	63224 KB	Output is correct
10	Correct	182 ms	69344 KB	Output is correct
11	Correct	57 ms	62968 KB	Output is correct
12	Correct	224 ms	69112 KB	Output is correct
13	Correct	221 ms	70052 KB	Output is correct
14	Correct	229 ms	71800 KB	Output is correct
15	Correct	164 ms	68252 KB	Output is correct
16	Correct	63 ms	63224 KB	Output is correct
17	Correct	66 ms	62968 KB	Output is correct
18	Correct	196 ms	71792 KB	Output is correct
19	Correct	258 ms	74844 KB	Output is correct
20	Correct	60 ms	63196 KB	Output is correct
21	Correct	57 ms	63100 KB	Output is correct
22	Correct	163 ms	70392 KB	Output is correct
23	Correct	60 ms	63224 KB	Output is correct
24	Correct	214 ms	69496 KB	Output is correct
25	Correct	214 ms	73824 KB	Output is correct
26	Correct	59 ms	63224 KB	Output is correct
27	Correct	59 ms	63352 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	58 ms	63224 KB	Output is correct
30	Correct	70 ms	63352 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	62972 KB	Output is correct
2	Correct	56 ms	62968 KB	Output is correct
3	Correct	56 ms	62968 KB	Output is correct
4	Correct	56 ms	62968 KB	Output is correct
5	Correct	58 ms	62968 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	56 ms	63008 KB	Output is correct
9	Correct	57 ms	62976 KB	Output is correct
10	Correct	56 ms	62968 KB	Output is correct
11	Correct	57 ms	63100 KB	Output is correct
12	Correct	57 ms	62932 KB	Output is correct
13	Correct	56 ms	62968 KB	Output is correct
14	Correct	57 ms	62968 KB	Output is correct
15	Correct	57 ms	62968 KB	Output is correct
16	Correct	57 ms	62968 KB	Output is correct
17	Correct	58 ms	62952 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	57 ms	63016 KB	Output is correct
22	Correct	56 ms	62968 KB	Output is correct
23	Correct	57 ms	62968 KB	Output is correct
24	Correct	56 ms	62968 KB	Output is correct
25	Correct	57 ms	62996 KB	Output is correct
26	Correct	69 ms	63224 KB	Output is correct
27	Correct	68 ms	63196 KB	Output is correct
28	Correct	117 ms	63352 KB	Output is correct
29	Correct	61 ms	63280 KB	Output is correct
30	Correct	60 ms	63096 KB	Output is correct
31	Correct	57 ms	62968 KB	Output is correct
32	Correct	60 ms	63352 KB	Output is correct
33	Correct	57 ms	63016 KB	Output is correct
34	Correct	58 ms	63196 KB	Output is correct
35	Correct	58 ms	63224 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	58 ms	63224 KB	Output is correct
41	Correct	64 ms	63224 KB	Output is correct
42	Correct	62 ms	63224 KB	Output is correct
43	Correct	65 ms	63340 KB	Output is correct
44	Correct	62 ms	62968 KB	Output is correct
45	Correct	59 ms	63316 KB	Output is correct
46	Correct	59 ms	63228 KB	Output is correct
47	Correct	56 ms	62968 KB	Output is correct
48	Correct	60 ms	63224 KB	Output is correct
49	Correct	59 ms	63224 KB	Output is correct
50	Correct	61 ms	63392 KB	Output is correct
51	Correct	60 ms	63352 KB	Output is correct
52	Correct	58 ms	63224 KB	Output is correct
53	Correct	59 ms	63224 KB	Output is correct
54	Correct	58 ms	63096 KB	Output is correct
55	Correct	57 ms	62940 KB	Output is correct
56	Correct	138 ms	68304 KB	Output is correct
57	Correct	168 ms	68452 KB	Output is correct
58	Correct	60 ms	63352 KB	Output is correct
59	Correct	57 ms	62944 KB	Output is correct
60	Correct	57 ms	62968 KB	Output is correct
61	Correct	172 ms	68572 KB	Output is correct
62	Correct	58 ms	63196 KB	Output is correct
63	Correct	214 ms	74152 KB	Output is correct
64	Correct	176 ms	68344 KB	Output is correct
65	Correct	58 ms	63224 KB	Output is correct
66	Correct	213 ms	69112 KB	Output is correct
67	Correct	59 ms	63096 KB	Output is correct
68	Correct	59 ms	63352 KB	Output is correct
69	Correct	139 ms	68336 KB	Output is correct
70	Correct	59 ms	63356 KB	Output is correct
71	Correct	174 ms	68340 KB	Output is correct
72	Correct	287 ms	70116 KB	Output is correct
73	Correct	66 ms	62968 KB	Output is correct
74	Correct	298 ms	74196 KB	Output is correct
75	Correct	206 ms	71416 KB	Output is correct
76	Correct	59 ms	63128 KB	Output is correct
77	Correct	59 ms	63128 KB	Output is correct
78	Correct	142 ms	68204 KB	Output is correct
79	Correct	177 ms	72048 KB	Output is correct
80	Correct	70 ms	63228 KB	Output is correct
81	Correct	60 ms	63224 KB	Output is correct
82	Correct	58 ms	63096 KB	Output is correct
83	Correct	57 ms	63096 KB	Output is correct
84	Correct	59 ms	63228 KB	Output is correct
85	Correct	205 ms	70136 KB	Output is correct
86	Correct	59 ms	63224 KB	Output is correct
87	Correct	182 ms	69344 KB	Output is correct
88	Correct	57 ms	62968 KB	Output is correct
89	Correct	224 ms	69112 KB	Output is correct
90	Correct	221 ms	70052 KB	Output is correct
91	Correct	229 ms	71800 KB	Output is correct
92	Correct	164 ms	68252 KB	Output is correct
93	Correct	63 ms	63224 KB	Output is correct
94	Correct	66 ms	62968 KB	Output is correct
95	Correct	196 ms	71792 KB	Output is correct
96	Correct	258 ms	74844 KB	Output is correct
97	Correct	60 ms	63196 KB	Output is correct
98	Correct	57 ms	63100 KB	Output is correct
99	Correct	163 ms	70392 KB	Output is correct
100	Correct	60 ms	63224 KB	Output is correct
101	Correct	214 ms	69496 KB	Output is correct
102	Correct	214 ms	73824 KB	Output is correct
103	Correct	59 ms	63224 KB	Output is correct
104	Correct	59 ms	63352 KB	Output is correct
105	Correct	59 ms	63224 KB	Output is correct
106	Correct	58 ms	63224 KB	Output is correct
107	Correct	70 ms	63352 KB	Output is correct
108	Correct	799 ms	98892 KB	Output is correct
109	Correct	1357 ms	103352 KB	Output is correct
110	Correct	1370 ms	112564 KB	Output is correct
111	Correct	1453 ms	125048 KB	Output is correct
112	Correct	1369 ms	117340 KB	Output is correct
113	Correct	857 ms	106480 KB	Output is correct
114	Incorrect	887 ms	89316 KB	Output isn't correct
115	Halted	0 ms	0 KB	-

답안 #138105

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