답안 #138140

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138140	2019-07-29T12:06:26 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	100 / 100	1517 ms	127208 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][21], 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<21; 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<21; 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=20; 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);
	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();
		assert(node);
	}
	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:48:21: 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:49:44: 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	23 ms	23800 KB	Output is correct
2	Correct	24 ms	23928 KB	Output is correct
3	Correct	24 ms	23928 KB	Output is correct
4	Correct	28 ms	23900 KB	Output is correct
5	Correct	24 ms	23800 KB	Output is correct
6	Correct	24 ms	23800 KB	Output is correct
7	Correct	23 ms	23800 KB	Output is correct
8	Correct	22 ms	23928 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	24 ms	23928 KB	Output is correct
11	Correct	24 ms	23804 KB	Output is correct
12	Correct	28 ms	23928 KB	Output is correct
13	Correct	24 ms	23928 KB	Output is correct
14	Correct	24 ms	23928 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	29 ms	23928 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23800 KB	Output is correct
19	Correct	24 ms	23800 KB	Output is correct
20	Correct	24 ms	23928 KB	Output is correct
21	Correct	24 ms	23928 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	28 ms	23928 KB	Output is correct
24	Correct	29 ms	24056 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	24 ms	23928 KB	Output is correct
3	Correct	24 ms	23928 KB	Output is correct
4	Correct	28 ms	23900 KB	Output is correct
5	Correct	24 ms	23800 KB	Output is correct
6	Correct	24 ms	23800 KB	Output is correct
7	Correct	23 ms	23800 KB	Output is correct
8	Correct	22 ms	23928 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	24 ms	23928 KB	Output is correct
11	Correct	24 ms	23804 KB	Output is correct
12	Correct	28 ms	23928 KB	Output is correct
13	Correct	24 ms	23928 KB	Output is correct
14	Correct	24 ms	23928 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	29 ms	23928 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23800 KB	Output is correct
19	Correct	24 ms	23800 KB	Output is correct
20	Correct	24 ms	23928 KB	Output is correct
21	Correct	24 ms	23928 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	28 ms	23928 KB	Output is correct
24	Correct	29 ms	24056 KB	Output is correct
25	Correct	24 ms	23800 KB	Output is correct
26	Correct	26 ms	24312 KB	Output is correct
27	Correct	26 ms	24312 KB	Output is correct
28	Correct	26 ms	24440 KB	Output is correct
29	Correct	27 ms	24444 KB	Output is correct
30	Correct	31 ms	24312 KB	Output is correct
31	Correct	29 ms	23800 KB	Output is correct
32	Correct	27 ms	24440 KB	Output is correct
33	Correct	23 ms	23928 KB	Output is correct
34	Correct	29 ms	24312 KB	Output is correct
35	Correct	27 ms	24312 KB	Output is correct
36	Correct	26 ms	24312 KB	Output is correct
37	Correct	27 ms	24312 KB	Output is correct
38	Correct	24 ms	23856 KB	Output is correct
39	Correct	27 ms	24312 KB	Output is correct
40	Correct	26 ms	24312 KB	Output is correct
41	Correct	26 ms	24312 KB	Output is correct
42	Correct	31 ms	24356 KB	Output is correct
43	Correct	27 ms	24440 KB	Output is correct
44	Correct	24 ms	23932 KB	Output is correct
45	Correct	28 ms	24440 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	23 ms	23928 KB	Output is correct
48	Correct	27 ms	24440 KB	Output is correct
49	Correct	26 ms	24448 KB	Output is correct
50	Correct	26 ms	24440 KB	Output is correct
51	Correct	26 ms	24300 KB	Output is correct
52	Correct	25 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	26 ms	24184 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	24 ms	23928 KB	Output is correct
3	Correct	24 ms	23928 KB	Output is correct
4	Correct	28 ms	23900 KB	Output is correct
5	Correct	24 ms	23800 KB	Output is correct
6	Correct	24 ms	23800 KB	Output is correct
7	Correct	23 ms	23800 KB	Output is correct
8	Correct	22 ms	23928 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	24 ms	23928 KB	Output is correct
11	Correct	24 ms	23804 KB	Output is correct
12	Correct	28 ms	23928 KB	Output is correct
13	Correct	24 ms	23928 KB	Output is correct
14	Correct	24 ms	23928 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	29 ms	23928 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23800 KB	Output is correct
19	Correct	24 ms	23800 KB	Output is correct
20	Correct	24 ms	23928 KB	Output is correct
21	Correct	24 ms	23928 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	28 ms	23928 KB	Output is correct
24	Correct	29 ms	24056 KB	Output is correct
25	Correct	24 ms	23840 KB	Output is correct
26	Correct	120 ms	37404 KB	Output is correct
27	Correct	150 ms	37368 KB	Output is correct
28	Correct	26 ms	24312 KB	Output is correct
29	Correct	24 ms	23928 KB	Output is correct
30	Correct	28 ms	23928 KB	Output is correct
31	Correct	148 ms	37624 KB	Output is correct
32	Correct	31 ms	24312 KB	Output is correct
33	Correct	295 ms	43256 KB	Output is correct
34	Correct	184 ms	37460 KB	Output is correct
35	Correct	26 ms	24312 KB	Output is correct
36	Correct	175 ms	38140 KB	Output is correct
37	Correct	26 ms	24316 KB	Output is correct
38	Correct	26 ms	24312 KB	Output is correct
39	Correct	113 ms	37332 KB	Output is correct
40	Correct	27 ms	24440 KB	Output is correct
41	Correct	148 ms	37488 KB	Output is correct
42	Correct	199 ms	39516 KB	Output is correct
43	Correct	23 ms	23800 KB	Output is correct
44	Correct	202 ms	43388 KB	Output is correct
45	Correct	192 ms	40448 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	26 ms	24312 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	115 ms	37488 KB	Output is correct
2	Correct	135 ms	41128 KB	Output is correct
3	Correct	32 ms	24312 KB	Output is correct
4	Correct	26 ms	24312 KB	Output is correct
5	Correct	27 ms	23928 KB	Output is correct
6	Correct	29 ms	23928 KB	Output is correct
7	Correct	26 ms	24312 KB	Output is correct
8	Correct	189 ms	39304 KB	Output is correct
9	Correct	26 ms	24312 KB	Output is correct
10	Correct	200 ms	38276 KB	Output is correct
11	Correct	30 ms	23800 KB	Output is correct
12	Correct	248 ms	38244 KB	Output is correct
13	Correct	184 ms	39148 KB	Output is correct
14	Correct	252 ms	40784 KB	Output is correct
15	Correct	115 ms	37232 KB	Output is correct
16	Correct	26 ms	24312 KB	Output is correct
17	Correct	24 ms	23800 KB	Output is correct
18	Correct	146 ms	40816 KB	Output is correct
19	Correct	210 ms	44008 KB	Output is correct
20	Correct	27 ms	24312 KB	Output is correct
21	Correct	23 ms	23928 KB	Output is correct
22	Correct	133 ms	39532 KB	Output is correct
23	Correct	26 ms	24440 KB	Output is correct
24	Correct	238 ms	38616 KB	Output is correct
25	Correct	199 ms	42900 KB	Output is correct
26	Correct	26 ms	24312 KB	Output is correct
27	Correct	26 ms	24440 KB	Output is correct
28	Correct	27 ms	24312 KB	Output is correct
29	Correct	25 ms	24312 KB	Output is correct
30	Correct	26 ms	24312 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	24 ms	23928 KB	Output is correct
3	Correct	24 ms	23928 KB	Output is correct
4	Correct	28 ms	23900 KB	Output is correct
5	Correct	24 ms	23800 KB	Output is correct
6	Correct	24 ms	23800 KB	Output is correct
7	Correct	23 ms	23800 KB	Output is correct
8	Correct	22 ms	23928 KB	Output is correct
9	Correct	23 ms	23800 KB	Output is correct
10	Correct	24 ms	23928 KB	Output is correct
11	Correct	24 ms	23804 KB	Output is correct
12	Correct	28 ms	23928 KB	Output is correct
13	Correct	24 ms	23928 KB	Output is correct
14	Correct	24 ms	23928 KB	Output is correct
15	Correct	24 ms	23928 KB	Output is correct
16	Correct	29 ms	23928 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23800 KB	Output is correct
19	Correct	24 ms	23800 KB	Output is correct
20	Correct	24 ms	23928 KB	Output is correct
21	Correct	24 ms	23928 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	28 ms	23928 KB	Output is correct
24	Correct	29 ms	24056 KB	Output is correct
25	Correct	24 ms	23800 KB	Output is correct
26	Correct	26 ms	24312 KB	Output is correct
27	Correct	26 ms	24312 KB	Output is correct
28	Correct	26 ms	24440 KB	Output is correct
29	Correct	27 ms	24444 KB	Output is correct
30	Correct	31 ms	24312 KB	Output is correct
31	Correct	29 ms	23800 KB	Output is correct
32	Correct	27 ms	24440 KB	Output is correct
33	Correct	23 ms	23928 KB	Output is correct
34	Correct	29 ms	24312 KB	Output is correct
35	Correct	27 ms	24312 KB	Output is correct
36	Correct	26 ms	24312 KB	Output is correct
37	Correct	27 ms	24312 KB	Output is correct
38	Correct	24 ms	23856 KB	Output is correct
39	Correct	27 ms	24312 KB	Output is correct
40	Correct	26 ms	24312 KB	Output is correct
41	Correct	26 ms	24312 KB	Output is correct
42	Correct	31 ms	24356 KB	Output is correct
43	Correct	27 ms	24440 KB	Output is correct
44	Correct	24 ms	23932 KB	Output is correct
45	Correct	28 ms	24440 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	23 ms	23928 KB	Output is correct
48	Correct	27 ms	24440 KB	Output is correct
49	Correct	26 ms	24448 KB	Output is correct
50	Correct	26 ms	24440 KB	Output is correct
51	Correct	26 ms	24300 KB	Output is correct
52	Correct	25 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	26 ms	24184 KB	Output is correct
55	Correct	24 ms	23840 KB	Output is correct
56	Correct	120 ms	37404 KB	Output is correct
57	Correct	150 ms	37368 KB	Output is correct
58	Correct	26 ms	24312 KB	Output is correct
59	Correct	24 ms	23928 KB	Output is correct
60	Correct	28 ms	23928 KB	Output is correct
61	Correct	148 ms	37624 KB	Output is correct
62	Correct	31 ms	24312 KB	Output is correct
63	Correct	295 ms	43256 KB	Output is correct
64	Correct	184 ms	37460 KB	Output is correct
65	Correct	26 ms	24312 KB	Output is correct
66	Correct	175 ms	38140 KB	Output is correct
67	Correct	26 ms	24316 KB	Output is correct
68	Correct	26 ms	24312 KB	Output is correct
69	Correct	113 ms	37332 KB	Output is correct
70	Correct	27 ms	24440 KB	Output is correct
71	Correct	148 ms	37488 KB	Output is correct
72	Correct	199 ms	39516 KB	Output is correct
73	Correct	23 ms	23800 KB	Output is correct
74	Correct	202 ms	43388 KB	Output is correct
75	Correct	192 ms	40448 KB	Output is correct
76	Correct	26 ms	24312 KB	Output is correct
77	Correct	26 ms	24312 KB	Output is correct
78	Correct	115 ms	37488 KB	Output is correct
79	Correct	135 ms	41128 KB	Output is correct
80	Correct	32 ms	24312 KB	Output is correct
81	Correct	26 ms	24312 KB	Output is correct
82	Correct	27 ms	23928 KB	Output is correct
83	Correct	29 ms	23928 KB	Output is correct
84	Correct	26 ms	24312 KB	Output is correct
85	Correct	189 ms	39304 KB	Output is correct
86	Correct	26 ms	24312 KB	Output is correct
87	Correct	200 ms	38276 KB	Output is correct
88	Correct	30 ms	23800 KB	Output is correct
89	Correct	248 ms	38244 KB	Output is correct
90	Correct	184 ms	39148 KB	Output is correct
91	Correct	252 ms	40784 KB	Output is correct
92	Correct	115 ms	37232 KB	Output is correct
93	Correct	26 ms	24312 KB	Output is correct
94	Correct	24 ms	23800 KB	Output is correct
95	Correct	146 ms	40816 KB	Output is correct
96	Correct	210 ms	44008 KB	Output is correct
97	Correct	27 ms	24312 KB	Output is correct
98	Correct	23 ms	23928 KB	Output is correct
99	Correct	133 ms	39532 KB	Output is correct
100	Correct	26 ms	24440 KB	Output is correct
101	Correct	238 ms	38616 KB	Output is correct
102	Correct	199 ms	42900 KB	Output is correct
103	Correct	26 ms	24312 KB	Output is correct
104	Correct	26 ms	24440 KB	Output is correct
105	Correct	27 ms	24312 KB	Output is correct
106	Correct	25 ms	24312 KB	Output is correct
107	Correct	26 ms	24312 KB	Output is correct
108	Correct	774 ms	100940 KB	Output is correct
109	Correct	1317 ms	105504 KB	Output is correct
110	Correct	1494 ms	114552 KB	Output is correct
111	Correct	1487 ms	127208 KB	Output is correct
112	Correct	1517 ms	119132 KB	Output is correct
113	Correct	874 ms	108560 KB	Output is correct
114	Correct	890 ms	91280 KB	Output is correct
115	Correct	992 ms	97776 KB	Output is correct
116	Correct	1089 ms	103804 KB	Output is correct
117	Correct	1260 ms	114732 KB	Output is correct
118	Correct	1002 ms	100272 KB	Output is correct
119	Correct	1394 ms	114768 KB	Output is correct
120	Correct	1489 ms	125584 KB	Output is correct
121	Correct	1172 ms	114512 KB	Output is correct
122	Correct	1152 ms	108512 KB	Output is correct
123	Correct	904 ms	115940 KB	Output is correct
124	Correct	1268 ms	112728 KB	Output is correct

답안 #138140

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 30.0 / 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
30.0 / 30.0