답안 #138135

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138135	2019-07-29T12:00:08 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	1432 ms	125956 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]) assert(mark[last] || last == 1), 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	63096 KB	Output is correct
2	Correct	57 ms	62972 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62968 KB	Output is correct
5	Correct	57 ms	62972 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	62968 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	58 ms	62940 KB	Output is correct
11	Correct	57 ms	62976 KB	Output is correct
12	Correct	57 ms	63068 KB	Output is correct
13	Correct	58 ms	62956 KB	Output is correct
14	Correct	57 ms	62964 KB	Output is correct
15	Correct	57 ms	63008 KB	Output is correct
16	Correct	57 ms	63068 KB	Output is correct
17	Correct	63 ms	63024 KB	Output is correct
18	Correct	69 ms	62968 KB	Output is correct
19	Correct	68 ms	62976 KB	Output is correct
20	Correct	58 ms	62968 KB	Output is correct
21	Correct	69 ms	63096 KB	Output is correct
22	Correct	57 ms	63048 KB	Output is correct
23	Correct	69 ms	63012 KB	Output is correct
24	Correct	57 ms	62968 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	63096 KB	Output is correct
2	Correct	57 ms	62972 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62968 KB	Output is correct
5	Correct	57 ms	62972 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	62968 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	58 ms	62940 KB	Output is correct
11	Correct	57 ms	62976 KB	Output is correct
12	Correct	57 ms	63068 KB	Output is correct
13	Correct	58 ms	62956 KB	Output is correct
14	Correct	57 ms	62964 KB	Output is correct
15	Correct	57 ms	63008 KB	Output is correct
16	Correct	57 ms	63068 KB	Output is correct
17	Correct	63 ms	63024 KB	Output is correct
18	Correct	69 ms	62968 KB	Output is correct
19	Correct	68 ms	62976 KB	Output is correct
20	Correct	58 ms	62968 KB	Output is correct
21	Correct	69 ms	63096 KB	Output is correct
22	Correct	57 ms	63048 KB	Output is correct
23	Correct	69 ms	63012 KB	Output is correct
24	Correct	57 ms	62968 KB	Output is correct
25	Correct	56 ms	62972 KB	Output is correct
26	Correct	60 ms	63272 KB	Output is correct
27	Correct	59 ms	63196 KB	Output is correct
28	Correct	61 ms	63352 KB	Output is correct
29	Correct	59 ms	63236 KB	Output is correct
30	Correct	59 ms	63224 KB	Output is correct
31	Correct	56 ms	62968 KB	Output is correct
32	Correct	88 ms	63352 KB	Output is correct
33	Correct	62 ms	62968 KB	Output is correct
34	Correct	67 ms	63224 KB	Output is correct
35	Correct	63 ms	63324 KB	Output is correct
36	Correct	60 ms	63224 KB	Output is correct
37	Correct	60 ms	63224 KB	Output is correct
38	Correct	57 ms	62916 KB	Output is correct
39	Correct	71 ms	63152 KB	Output is correct
40	Correct	58 ms	63164 KB	Output is correct
41	Correct	59 ms	63228 KB	Output is correct
42	Correct	59 ms	63224 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	57 ms	63052 KB	Output is correct
45	Correct	75 ms	63300 KB	Output is correct
46	Correct	60 ms	63224 KB	Output is correct
47	Correct	71 ms	62968 KB	Output is correct
48	Correct	59 ms	63224 KB	Output is correct
49	Correct	69 ms	63196 KB	Output is correct
50	Correct	59 ms	63352 KB	Output is correct
51	Correct	67 ms	63200 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	57 ms	63096 KB	Output is correct
2	Correct	57 ms	62972 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62968 KB	Output is correct
5	Correct	57 ms	62972 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	62968 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	58 ms	62940 KB	Output is correct
11	Correct	57 ms	62976 KB	Output is correct
12	Correct	57 ms	63068 KB	Output is correct
13	Correct	58 ms	62956 KB	Output is correct
14	Correct	57 ms	62964 KB	Output is correct
15	Correct	57 ms	63008 KB	Output is correct
16	Correct	57 ms	63068 KB	Output is correct
17	Correct	63 ms	63024 KB	Output is correct
18	Correct	69 ms	62968 KB	Output is correct
19	Correct	68 ms	62976 KB	Output is correct
20	Correct	58 ms	62968 KB	Output is correct
21	Correct	69 ms	63096 KB	Output is correct
22	Correct	57 ms	63048 KB	Output is correct
23	Correct	69 ms	63012 KB	Output is correct
24	Correct	57 ms	62968 KB	Output is correct
25	Correct	57 ms	62940 KB	Output is correct
26	Correct	151 ms	68332 KB	Output is correct
27	Correct	180 ms	68344 KB	Output is correct
28	Correct	59 ms	63220 KB	Output is correct
29	Correct	57 ms	62996 KB	Output is correct
30	Correct	57 ms	63096 KB	Output is correct
31	Correct	174 ms	68536 KB	Output is correct
32	Correct	59 ms	63224 KB	Output is correct
33	Correct	242 ms	74096 KB	Output is correct
34	Correct	184 ms	68480 KB	Output is correct
35	Correct	59 ms	63224 KB	Output is correct
36	Correct	208 ms	69112 KB	Output is correct
37	Correct	59 ms	63096 KB	Output is correct
38	Correct	59 ms	63132 KB	Output is correct
39	Correct	140 ms	68208 KB	Output is correct
40	Correct	58 ms	63352 KB	Output is correct
41	Correct	174 ms	68384 KB	Output is correct
42	Correct	228 ms	70136 KB	Output is correct
43	Correct	57 ms	62968 KB	Output is correct
44	Correct	260 ms	74368 KB	Output is correct
45	Correct	209 ms	71348 KB	Output is correct
46	Correct	62 ms	63236 KB	Output is correct
47	Correct	69 ms	63096 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	158 ms	68312 KB	Output is correct
2	Correct	182 ms	72080 KB	Output is correct
3	Correct	59 ms	63224 KB	Output is correct
4	Correct	60 ms	63224 KB	Output is correct
5	Correct	56 ms	62972 KB	Output is correct
6	Correct	58 ms	62968 KB	Output is correct
7	Correct	58 ms	63224 KB	Output is correct
8	Correct	202 ms	70132 KB	Output is correct
9	Correct	60 ms	63224 KB	Output is correct
10	Correct	185 ms	69188 KB	Output is correct
11	Correct	56 ms	62968 KB	Output is correct
12	Correct	209 ms	69072 KB	Output is correct
13	Correct	262 ms	70180 KB	Output is correct
14	Correct	202 ms	71748 KB	Output is correct
15	Correct	142 ms	68236 KB	Output is correct
16	Correct	61 ms	63224 KB	Output is correct
17	Correct	57 ms	62968 KB	Output is correct
18	Correct	179 ms	71664 KB	Output is correct
19	Correct	245 ms	74872 KB	Output is correct
20	Correct	59 ms	63224 KB	Output is correct
21	Correct	57 ms	62996 KB	Output is correct
22	Correct	166 ms	70552 KB	Output is correct
23	Correct	59 ms	63224 KB	Output is correct
24	Correct	211 ms	69368 KB	Output is correct
25	Correct	218 ms	73720 KB	Output is correct
26	Correct	67 ms	63228 KB	Output is correct
27	Correct	60 ms	63352 KB	Output is correct
28	Correct	59 ms	63224 KB	Output is correct
29	Correct	58 ms	63124 KB	Output is correct
30	Correct	58 ms	63096 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	63096 KB	Output is correct
2	Correct	57 ms	62972 KB	Output is correct
3	Correct	57 ms	62968 KB	Output is correct
4	Correct	57 ms	62968 KB	Output is correct
5	Correct	57 ms	62972 KB	Output is correct
6	Correct	56 ms	62968 KB	Output is correct
7	Correct	56 ms	62968 KB	Output is correct
8	Correct	56 ms	62968 KB	Output is correct
9	Correct	56 ms	62968 KB	Output is correct
10	Correct	58 ms	62940 KB	Output is correct
11	Correct	57 ms	62976 KB	Output is correct
12	Correct	57 ms	63068 KB	Output is correct
13	Correct	58 ms	62956 KB	Output is correct
14	Correct	57 ms	62964 KB	Output is correct
15	Correct	57 ms	63008 KB	Output is correct
16	Correct	57 ms	63068 KB	Output is correct
17	Correct	63 ms	63024 KB	Output is correct
18	Correct	69 ms	62968 KB	Output is correct
19	Correct	68 ms	62976 KB	Output is correct
20	Correct	58 ms	62968 KB	Output is correct
21	Correct	69 ms	63096 KB	Output is correct
22	Correct	57 ms	63048 KB	Output is correct
23	Correct	69 ms	63012 KB	Output is correct
24	Correct	57 ms	62968 KB	Output is correct
25	Correct	56 ms	62972 KB	Output is correct
26	Correct	60 ms	63272 KB	Output is correct
27	Correct	59 ms	63196 KB	Output is correct
28	Correct	61 ms	63352 KB	Output is correct
29	Correct	59 ms	63236 KB	Output is correct
30	Correct	59 ms	63224 KB	Output is correct
31	Correct	56 ms	62968 KB	Output is correct
32	Correct	88 ms	63352 KB	Output is correct
33	Correct	62 ms	62968 KB	Output is correct
34	Correct	67 ms	63224 KB	Output is correct
35	Correct	63 ms	63324 KB	Output is correct
36	Correct	60 ms	63224 KB	Output is correct
37	Correct	60 ms	63224 KB	Output is correct
38	Correct	57 ms	62916 KB	Output is correct
39	Correct	71 ms	63152 KB	Output is correct
40	Correct	58 ms	63164 KB	Output is correct
41	Correct	59 ms	63228 KB	Output is correct
42	Correct	59 ms	63224 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	57 ms	63052 KB	Output is correct
45	Correct	75 ms	63300 KB	Output is correct
46	Correct	60 ms	63224 KB	Output is correct
47	Correct	71 ms	62968 KB	Output is correct
48	Correct	59 ms	63224 KB	Output is correct
49	Correct	69 ms	63196 KB	Output is correct
50	Correct	59 ms	63352 KB	Output is correct
51	Correct	67 ms	63200 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	62940 KB	Output is correct
56	Correct	151 ms	68332 KB	Output is correct
57	Correct	180 ms	68344 KB	Output is correct
58	Correct	59 ms	63220 KB	Output is correct
59	Correct	57 ms	62996 KB	Output is correct
60	Correct	57 ms	63096 KB	Output is correct
61	Correct	174 ms	68536 KB	Output is correct
62	Correct	59 ms	63224 KB	Output is correct
63	Correct	242 ms	74096 KB	Output is correct
64	Correct	184 ms	68480 KB	Output is correct
65	Correct	59 ms	63224 KB	Output is correct
66	Correct	208 ms	69112 KB	Output is correct
67	Correct	59 ms	63096 KB	Output is correct
68	Correct	59 ms	63132 KB	Output is correct
69	Correct	140 ms	68208 KB	Output is correct
70	Correct	58 ms	63352 KB	Output is correct
71	Correct	174 ms	68384 KB	Output is correct
72	Correct	228 ms	70136 KB	Output is correct
73	Correct	57 ms	62968 KB	Output is correct
74	Correct	260 ms	74368 KB	Output is correct
75	Correct	209 ms	71348 KB	Output is correct
76	Correct	62 ms	63236 KB	Output is correct
77	Correct	69 ms	63096 KB	Output is correct
78	Correct	158 ms	68312 KB	Output is correct
79	Correct	182 ms	72080 KB	Output is correct
80	Correct	59 ms	63224 KB	Output is correct
81	Correct	60 ms	63224 KB	Output is correct
82	Correct	56 ms	62972 KB	Output is correct
83	Correct	58 ms	62968 KB	Output is correct
84	Correct	58 ms	63224 KB	Output is correct
85	Correct	202 ms	70132 KB	Output is correct
86	Correct	60 ms	63224 KB	Output is correct
87	Correct	185 ms	69188 KB	Output is correct
88	Correct	56 ms	62968 KB	Output is correct
89	Correct	209 ms	69072 KB	Output is correct
90	Correct	262 ms	70180 KB	Output is correct
91	Correct	202 ms	71748 KB	Output is correct
92	Correct	142 ms	68236 KB	Output is correct
93	Correct	61 ms	63224 KB	Output is correct
94	Correct	57 ms	62968 KB	Output is correct
95	Correct	179 ms	71664 KB	Output is correct
96	Correct	245 ms	74872 KB	Output is correct
97	Correct	59 ms	63224 KB	Output is correct
98	Correct	57 ms	62996 KB	Output is correct
99	Correct	166 ms	70552 KB	Output is correct
100	Correct	59 ms	63224 KB	Output is correct
101	Correct	211 ms	69368 KB	Output is correct
102	Correct	218 ms	73720 KB	Output is correct
103	Correct	67 ms	63228 KB	Output is correct
104	Correct	60 ms	63352 KB	Output is correct
105	Correct	59 ms	63224 KB	Output is correct
106	Correct	58 ms	63124 KB	Output is correct
107	Correct	58 ms	63096 KB	Output is correct
108	Correct	826 ms	98768 KB	Output is correct
109	Correct	1326 ms	105140 KB	Output is correct
110	Correct	1360 ms	113636 KB	Output is correct
111	Correct	1432 ms	125956 KB	Output is correct
112	Correct	1346 ms	118008 KB	Output is correct
113	Correct	881 ms	107428 KB	Output is correct
114	Incorrect	972 ms	90188 KB	Output isn't correct
115	Halted	0 ms	0 KB	-

답안 #138135

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