답안 #138139

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138139	2019-07-29T12:04:39 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	694 ms	191836 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);
	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();
		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: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	59 ms	65016 KB	Output is correct
2	Correct	65 ms	64884 KB	Output is correct
3	Correct	58 ms	65016 KB	Output is correct
4	Correct	59 ms	65036 KB	Output is correct
5	Correct	59 ms	65016 KB	Output is correct
6	Correct	58 ms	64888 KB	Output is correct
7	Correct	58 ms	64888 KB	Output is correct
8	Correct	59 ms	65016 KB	Output is correct
9	Correct	58 ms	64888 KB	Output is correct
10	Correct	58 ms	65016 KB	Output is correct
11	Correct	58 ms	64956 KB	Output is correct
12	Correct	58 ms	65016 KB	Output is correct
13	Correct	58 ms	64888 KB	Output is correct
14	Correct	58 ms	65016 KB	Output is correct
15	Correct	59 ms	65016 KB	Output is correct
16	Correct	58 ms	64880 KB	Output is correct
17	Correct	59 ms	65016 KB	Output is correct
18	Correct	58 ms	64888 KB	Output is correct
19	Correct	58 ms	64916 KB	Output is correct
20	Correct	58 ms	65016 KB	Output is correct
21	Correct	66 ms	65016 KB	Output is correct
22	Correct	58 ms	64980 KB	Output is correct
23	Correct	58 ms	65016 KB	Output is correct
24	Correct	60 ms	65016 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	65016 KB	Output is correct
2	Correct	65 ms	64884 KB	Output is correct
3	Correct	58 ms	65016 KB	Output is correct
4	Correct	59 ms	65036 KB	Output is correct
5	Correct	59 ms	65016 KB	Output is correct
6	Correct	58 ms	64888 KB	Output is correct
7	Correct	58 ms	64888 KB	Output is correct
8	Correct	59 ms	65016 KB	Output is correct
9	Correct	58 ms	64888 KB	Output is correct
10	Correct	58 ms	65016 KB	Output is correct
11	Correct	58 ms	64956 KB	Output is correct
12	Correct	58 ms	65016 KB	Output is correct
13	Correct	58 ms	64888 KB	Output is correct
14	Correct	58 ms	65016 KB	Output is correct
15	Correct	59 ms	65016 KB	Output is correct
16	Correct	58 ms	64880 KB	Output is correct
17	Correct	59 ms	65016 KB	Output is correct
18	Correct	58 ms	64888 KB	Output is correct
19	Correct	58 ms	64916 KB	Output is correct
20	Correct	58 ms	65016 KB	Output is correct
21	Correct	66 ms	65016 KB	Output is correct
22	Correct	58 ms	64980 KB	Output is correct
23	Correct	58 ms	65016 KB	Output is correct
24	Correct	60 ms	65016 KB	Output is correct
25	Correct	59 ms	65012 KB	Output is correct
26	Correct	69 ms	65272 KB	Output is correct
27	Correct	73 ms	65144 KB	Output is correct
28	Correct	61 ms	65400 KB	Output is correct
29	Correct	61 ms	65148 KB	Output is correct
30	Correct	61 ms	65144 KB	Output is correct
31	Correct	58 ms	65016 KB	Output is correct
32	Correct	61 ms	65400 KB	Output is correct
33	Correct	58 ms	65016 KB	Output is correct
34	Correct	64 ms	65144 KB	Output is correct
35	Correct	62 ms	65144 KB	Output is correct
36	Correct	61 ms	65144 KB	Output is correct
37	Correct	61 ms	65140 KB	Output is correct
38	Correct	58 ms	64892 KB	Output is correct
39	Correct	61 ms	65144 KB	Output is correct
40	Correct	60 ms	65144 KB	Output is correct
41	Correct	61 ms	65144 KB	Output is correct
42	Correct	60 ms	65144 KB	Output is correct
43	Correct	61 ms	65272 KB	Output is correct
44	Correct	66 ms	65016 KB	Output is correct
45	Correct	61 ms	65276 KB	Output is correct
46	Correct	61 ms	65200 KB	Output is correct
47	Correct	58 ms	65020 KB	Output is correct
48	Correct	61 ms	65144 KB	Output is correct
49	Correct	60 ms	65196 KB	Output is correct
50	Correct	61 ms	65272 KB	Output is correct
51	Correct	61 ms	65144 KB	Output is correct
52	Correct	60 ms	65144 KB	Output is correct
53	Correct	60 ms	65096 KB	Output is correct
54	Correct	61 ms	65144 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	65016 KB	Output is correct
2	Correct	65 ms	64884 KB	Output is correct
3	Correct	58 ms	65016 KB	Output is correct
4	Correct	59 ms	65036 KB	Output is correct
5	Correct	59 ms	65016 KB	Output is correct
6	Correct	58 ms	64888 KB	Output is correct
7	Correct	58 ms	64888 KB	Output is correct
8	Correct	59 ms	65016 KB	Output is correct
9	Correct	58 ms	64888 KB	Output is correct
10	Correct	58 ms	65016 KB	Output is correct
11	Correct	58 ms	64956 KB	Output is correct
12	Correct	58 ms	65016 KB	Output is correct
13	Correct	58 ms	64888 KB	Output is correct
14	Correct	58 ms	65016 KB	Output is correct
15	Correct	59 ms	65016 KB	Output is correct
16	Correct	58 ms	64880 KB	Output is correct
17	Correct	59 ms	65016 KB	Output is correct
18	Correct	58 ms	64888 KB	Output is correct
19	Correct	58 ms	64916 KB	Output is correct
20	Correct	58 ms	65016 KB	Output is correct
21	Correct	66 ms	65016 KB	Output is correct
22	Correct	58 ms	64980 KB	Output is correct
23	Correct	58 ms	65016 KB	Output is correct
24	Correct	60 ms	65016 KB	Output is correct
25	Correct	58 ms	64888 KB	Output is correct
26	Correct	138 ms	70256 KB	Output is correct
27	Correct	178 ms	70264 KB	Output is correct
28	Correct	63 ms	65144 KB	Output is correct
29	Correct	58 ms	64992 KB	Output is correct
30	Correct	58 ms	65016 KB	Output is correct
31	Correct	186 ms	70520 KB	Output is correct
32	Correct	61 ms	65144 KB	Output is correct
33	Correct	238 ms	75944 KB	Output is correct
34	Correct	181 ms	70264 KB	Output is correct
35	Correct	61 ms	65144 KB	Output is correct
36	Correct	301 ms	71124 KB	Output is correct
37	Correct	73 ms	65144 KB	Output is correct
38	Correct	62 ms	65144 KB	Output is correct
39	Correct	180 ms	70120 KB	Output is correct
40	Correct	77 ms	65272 KB	Output is correct
41	Correct	248 ms	70228 KB	Output is correct
42	Correct	220 ms	72380 KB	Output is correct
43	Correct	58 ms	65016 KB	Output is correct
44	Correct	233 ms	76416 KB	Output is correct
45	Correct	222 ms	73180 KB	Output is correct
46	Correct	60 ms	65144 KB	Output is correct
47	Correct	60 ms	65152 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	139 ms	70128 KB	Output is correct
2	Correct	177 ms	73900 KB	Output is correct
3	Correct	72 ms	65200 KB	Output is correct
4	Correct	72 ms	65144 KB	Output is correct
5	Correct	58 ms	64888 KB	Output is correct
6	Correct	66 ms	64988 KB	Output is correct
7	Correct	59 ms	65144 KB	Output is correct
8	Correct	193 ms	72184 KB	Output is correct
9	Correct	61 ms	65140 KB	Output is correct
10	Correct	180 ms	71100 KB	Output is correct
11	Correct	59 ms	64888 KB	Output is correct
12	Correct	211 ms	71068 KB	Output is correct
13	Correct	207 ms	72048 KB	Output is correct
14	Correct	239 ms	73720 KB	Output is correct
15	Correct	145 ms	70144 KB	Output is correct
16	Correct	60 ms	65148 KB	Output is correct
17	Correct	59 ms	64996 KB	Output is correct
18	Correct	169 ms	73704 KB	Output is correct
19	Correct	345 ms	76912 KB	Output is correct
20	Correct	77 ms	65144 KB	Output is correct
21	Correct	73 ms	64912 KB	Output is correct
22	Correct	221 ms	72428 KB	Output is correct
23	Correct	74 ms	65116 KB	Output is correct
24	Correct	295 ms	71388 KB	Output is correct
25	Correct	274 ms	75740 KB	Output is correct
26	Correct	61 ms	65272 KB	Output is correct
27	Correct	61 ms	65184 KB	Output is correct
28	Correct	61 ms	65068 KB	Output is correct
29	Correct	60 ms	65148 KB	Output is correct
30	Correct	60 ms	65144 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	65016 KB	Output is correct
2	Correct	65 ms	64884 KB	Output is correct
3	Correct	58 ms	65016 KB	Output is correct
4	Correct	59 ms	65036 KB	Output is correct
5	Correct	59 ms	65016 KB	Output is correct
6	Correct	58 ms	64888 KB	Output is correct
7	Correct	58 ms	64888 KB	Output is correct
8	Correct	59 ms	65016 KB	Output is correct
9	Correct	58 ms	64888 KB	Output is correct
10	Correct	58 ms	65016 KB	Output is correct
11	Correct	58 ms	64956 KB	Output is correct
12	Correct	58 ms	65016 KB	Output is correct
13	Correct	58 ms	64888 KB	Output is correct
14	Correct	58 ms	65016 KB	Output is correct
15	Correct	59 ms	65016 KB	Output is correct
16	Correct	58 ms	64880 KB	Output is correct
17	Correct	59 ms	65016 KB	Output is correct
18	Correct	58 ms	64888 KB	Output is correct
19	Correct	58 ms	64916 KB	Output is correct
20	Correct	58 ms	65016 KB	Output is correct
21	Correct	66 ms	65016 KB	Output is correct
22	Correct	58 ms	64980 KB	Output is correct
23	Correct	58 ms	65016 KB	Output is correct
24	Correct	60 ms	65016 KB	Output is correct
25	Correct	59 ms	65012 KB	Output is correct
26	Correct	69 ms	65272 KB	Output is correct
27	Correct	73 ms	65144 KB	Output is correct
28	Correct	61 ms	65400 KB	Output is correct
29	Correct	61 ms	65148 KB	Output is correct
30	Correct	61 ms	65144 KB	Output is correct
31	Correct	58 ms	65016 KB	Output is correct
32	Correct	61 ms	65400 KB	Output is correct
33	Correct	58 ms	65016 KB	Output is correct
34	Correct	64 ms	65144 KB	Output is correct
35	Correct	62 ms	65144 KB	Output is correct
36	Correct	61 ms	65144 KB	Output is correct
37	Correct	61 ms	65140 KB	Output is correct
38	Correct	58 ms	64892 KB	Output is correct
39	Correct	61 ms	65144 KB	Output is correct
40	Correct	60 ms	65144 KB	Output is correct
41	Correct	61 ms	65144 KB	Output is correct
42	Correct	60 ms	65144 KB	Output is correct
43	Correct	61 ms	65272 KB	Output is correct
44	Correct	66 ms	65016 KB	Output is correct
45	Correct	61 ms	65276 KB	Output is correct
46	Correct	61 ms	65200 KB	Output is correct
47	Correct	58 ms	65020 KB	Output is correct
48	Correct	61 ms	65144 KB	Output is correct
49	Correct	60 ms	65196 KB	Output is correct
50	Correct	61 ms	65272 KB	Output is correct
51	Correct	61 ms	65144 KB	Output is correct
52	Correct	60 ms	65144 KB	Output is correct
53	Correct	60 ms	65096 KB	Output is correct
54	Correct	61 ms	65144 KB	Output is correct
55	Correct	58 ms	64888 KB	Output is correct
56	Correct	138 ms	70256 KB	Output is correct
57	Correct	178 ms	70264 KB	Output is correct
58	Correct	63 ms	65144 KB	Output is correct
59	Correct	58 ms	64992 KB	Output is correct
60	Correct	58 ms	65016 KB	Output is correct
61	Correct	186 ms	70520 KB	Output is correct
62	Correct	61 ms	65144 KB	Output is correct
63	Correct	238 ms	75944 KB	Output is correct
64	Correct	181 ms	70264 KB	Output is correct
65	Correct	61 ms	65144 KB	Output is correct
66	Correct	301 ms	71124 KB	Output is correct
67	Correct	73 ms	65144 KB	Output is correct
68	Correct	62 ms	65144 KB	Output is correct
69	Correct	180 ms	70120 KB	Output is correct
70	Correct	77 ms	65272 KB	Output is correct
71	Correct	248 ms	70228 KB	Output is correct
72	Correct	220 ms	72380 KB	Output is correct
73	Correct	58 ms	65016 KB	Output is correct
74	Correct	233 ms	76416 KB	Output is correct
75	Correct	222 ms	73180 KB	Output is correct
76	Correct	60 ms	65144 KB	Output is correct
77	Correct	60 ms	65152 KB	Output is correct
78	Correct	139 ms	70128 KB	Output is correct
79	Correct	177 ms	73900 KB	Output is correct
80	Correct	72 ms	65200 KB	Output is correct
81	Correct	72 ms	65144 KB	Output is correct
82	Correct	58 ms	64888 KB	Output is correct
83	Correct	66 ms	64988 KB	Output is correct
84	Correct	59 ms	65144 KB	Output is correct
85	Correct	193 ms	72184 KB	Output is correct
86	Correct	61 ms	65140 KB	Output is correct
87	Correct	180 ms	71100 KB	Output is correct
88	Correct	59 ms	64888 KB	Output is correct
89	Correct	211 ms	71068 KB	Output is correct
90	Correct	207 ms	72048 KB	Output is correct
91	Correct	239 ms	73720 KB	Output is correct
92	Correct	145 ms	70144 KB	Output is correct
93	Correct	60 ms	65148 KB	Output is correct
94	Correct	59 ms	64996 KB	Output is correct
95	Correct	169 ms	73704 KB	Output is correct
96	Correct	345 ms	76912 KB	Output is correct
97	Correct	77 ms	65144 KB	Output is correct
98	Correct	73 ms	64912 KB	Output is correct
99	Correct	221 ms	72428 KB	Output is correct
100	Correct	74 ms	65116 KB	Output is correct
101	Correct	295 ms	71388 KB	Output is correct
102	Correct	274 ms	75740 KB	Output is correct
103	Correct	61 ms	65272 KB	Output is correct
104	Correct	61 ms	65184 KB	Output is correct
105	Correct	61 ms	65068 KB	Output is correct
106	Correct	60 ms	65148 KB	Output is correct
107	Correct	60 ms	65144 KB	Output is correct
108	Runtime error	694 ms	191836 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
109	Halted	0 ms	0 KB	-

답안 #138139

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