답안 #138094

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138094	2019-07-29T10:25:38 Z	Mahmoud_Adel	Mergers (JOI19_mergers)	C++14	70 / 100	2158 ms	125756 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], acc[N], cnt[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)
{
	for(auto v : adj[u]) if(v != p) DFS(v, u), acc[u] += acc[v];
	if(mark[u] && !acc[u]) cnt[u]=1;
	acc[u] += mark[u];
}
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();
	}
	if(n == 1) return cout << 0 << endl, 0;
	calc(1, 0);
	mark[1] = 0;
	DFS(1, 0);
	if(m > 1)
	{
		memset(sp, -1, sizeof sp);
		memset(mark, 0, sizeof mark);
		memset(dep, 0, sizeof dep);
		memset(ret, 0, sizeof ret);
		memset(sub, 0, sizeof sub);
		memset(acc, 0, sizeof acc);
		int nd;
		if(s[1] == 1) nd = vec[2][0];
		else nd = vec[1][0];
		pre(nd, 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(nd, 0);
		mark[nd] = 0;
		DFS(nd, 0);
	}
	for(int i=1; i<=n; i++) ans += cnt[i];
	cout << (ans+1)/2 << endl;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:47:21: 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:48:44: 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	72 ms	72696 KB	Output is correct
2	Correct	72 ms	72824 KB	Output is correct
3	Correct	73 ms	72696 KB	Output is correct
4	Correct	73 ms	72952 KB	Output is correct
5	Correct	72 ms	72696 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	72 ms	72696 KB	Output is correct
9	Correct	73 ms	72740 KB	Output is correct
10	Correct	72 ms	72696 KB	Output is correct
11	Correct	72 ms	72696 KB	Output is correct
12	Correct	73 ms	72680 KB	Output is correct
13	Correct	73 ms	72696 KB	Output is correct
14	Correct	72 ms	72696 KB	Output is correct
15	Correct	80 ms	72724 KB	Output is correct
16	Correct	72 ms	72752 KB	Output is correct
17	Correct	73 ms	72696 KB	Output is correct
18	Correct	73 ms	72824 KB	Output is correct
19	Correct	74 ms	72800 KB	Output is correct
20	Correct	72 ms	72824 KB	Output is correct
21	Correct	72 ms	72696 KB	Output is correct
22	Correct	75 ms	72828 KB	Output is correct
23	Correct	73 ms	72704 KB	Output is correct
24	Correct	73 ms	72760 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	72 ms	72696 KB	Output is correct
2	Correct	72 ms	72824 KB	Output is correct
3	Correct	73 ms	72696 KB	Output is correct
4	Correct	73 ms	72952 KB	Output is correct
5	Correct	72 ms	72696 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	72 ms	72696 KB	Output is correct
9	Correct	73 ms	72740 KB	Output is correct
10	Correct	72 ms	72696 KB	Output is correct
11	Correct	72 ms	72696 KB	Output is correct
12	Correct	73 ms	72680 KB	Output is correct
13	Correct	73 ms	72696 KB	Output is correct
14	Correct	72 ms	72696 KB	Output is correct
15	Correct	80 ms	72724 KB	Output is correct
16	Correct	72 ms	72752 KB	Output is correct
17	Correct	73 ms	72696 KB	Output is correct
18	Correct	73 ms	72824 KB	Output is correct
19	Correct	74 ms	72800 KB	Output is correct
20	Correct	72 ms	72824 KB	Output is correct
21	Correct	72 ms	72696 KB	Output is correct
22	Correct	75 ms	72828 KB	Output is correct
23	Correct	73 ms	72704 KB	Output is correct
24	Correct	73 ms	72760 KB	Output is correct
25	Correct	73 ms	72768 KB	Output is correct
26	Correct	76 ms	72924 KB	Output is correct
27	Correct	76 ms	72928 KB	Output is correct
28	Correct	75 ms	72952 KB	Output is correct
29	Correct	76 ms	72952 KB	Output is correct
30	Correct	76 ms	72824 KB	Output is correct
31	Correct	72 ms	72696 KB	Output is correct
32	Correct	78 ms	73116 KB	Output is correct
33	Correct	72 ms	72824 KB	Output is correct
34	Correct	75 ms	72952 KB	Output is correct
35	Correct	75 ms	72952 KB	Output is correct
36	Correct	76 ms	72840 KB	Output is correct
37	Correct	77 ms	73012 KB	Output is correct
38	Correct	73 ms	72828 KB	Output is correct
39	Correct	76 ms	72952 KB	Output is correct
40	Correct	59 ms	63224 KB	Output is correct
41	Correct	76 ms	72952 KB	Output is correct
42	Correct	75 ms	72952 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	73 ms	72824 KB	Output is correct
45	Correct	76 ms	73052 KB	Output is correct
46	Correct	76 ms	72952 KB	Output is correct
47	Correct	84 ms	72752 KB	Output is correct
48	Correct	93 ms	72952 KB	Output is correct
49	Correct	75 ms	72952 KB	Output is correct
50	Correct	77 ms	73080 KB	Output is correct
51	Correct	76 ms	72856 KB	Output is correct
52	Correct	74 ms	72988 KB	Output is correct
53	Correct	75 ms	72916 KB	Output is correct
54	Correct	76 ms	72952 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	72 ms	72696 KB	Output is correct
2	Correct	72 ms	72824 KB	Output is correct
3	Correct	73 ms	72696 KB	Output is correct
4	Correct	73 ms	72952 KB	Output is correct
5	Correct	72 ms	72696 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	72 ms	72696 KB	Output is correct
9	Correct	73 ms	72740 KB	Output is correct
10	Correct	72 ms	72696 KB	Output is correct
11	Correct	72 ms	72696 KB	Output is correct
12	Correct	73 ms	72680 KB	Output is correct
13	Correct	73 ms	72696 KB	Output is correct
14	Correct	72 ms	72696 KB	Output is correct
15	Correct	80 ms	72724 KB	Output is correct
16	Correct	72 ms	72752 KB	Output is correct
17	Correct	73 ms	72696 KB	Output is correct
18	Correct	73 ms	72824 KB	Output is correct
19	Correct	74 ms	72800 KB	Output is correct
20	Correct	72 ms	72824 KB	Output is correct
21	Correct	72 ms	72696 KB	Output is correct
22	Correct	75 ms	72828 KB	Output is correct
23	Correct	73 ms	72704 KB	Output is correct
24	Correct	73 ms	72760 KB	Output is correct
25	Correct	74 ms	72816 KB	Output is correct
26	Correct	185 ms	77280 KB	Output is correct
27	Correct	233 ms	76916 KB	Output is correct
28	Correct	76 ms	72828 KB	Output is correct
29	Correct	72 ms	72824 KB	Output is correct
30	Correct	72 ms	72744 KB	Output is correct
31	Correct	236 ms	76940 KB	Output is correct
32	Correct	74 ms	73080 KB	Output is correct
33	Correct	326 ms	82524 KB	Output is correct
34	Correct	260 ms	77060 KB	Output is correct
35	Correct	75 ms	72828 KB	Output is correct
36	Correct	297 ms	77928 KB	Output is correct
37	Correct	60 ms	63224 KB	Output is correct
38	Correct	75 ms	72952 KB	Output is correct
39	Correct	180 ms	77712 KB	Output is correct
40	Correct	60 ms	63352 KB	Output is correct
41	Correct	179 ms	69092 KB	Output is correct
42	Correct	310 ms	80120 KB	Output is correct
43	Correct	74 ms	72696 KB	Output is correct
44	Correct	222 ms	75096 KB	Output is correct
45	Correct	288 ms	80376 KB	Output is correct
46	Correct	75 ms	72952 KB	Output is correct
47	Correct	77 ms	72952 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	177 ms	77252 KB	Output is correct
2	Correct	219 ms	80120 KB	Output is correct
3	Correct	76 ms	72932 KB	Output is correct
4	Correct	83 ms	72896 KB	Output is correct
5	Correct	72 ms	72824 KB	Output is correct
6	Correct	72 ms	72680 KB	Output is correct
7	Correct	75 ms	72952 KB	Output is correct
8	Correct	284 ms	78392 KB	Output is correct
9	Correct	76 ms	72952 KB	Output is correct
10	Correct	243 ms	77304 KB	Output is correct
11	Correct	73 ms	72700 KB	Output is correct
12	Correct	299 ms	77708 KB	Output is correct
13	Correct	396 ms	78712 KB	Output is correct
14	Correct	267 ms	80376 KB	Output is correct
15	Correct	182 ms	77552 KB	Output is correct
16	Correct	76 ms	72952 KB	Output is correct
17	Correct	73 ms	72824 KB	Output is correct
18	Correct	210 ms	80192 KB	Output is correct
19	Correct	337 ms	85496 KB	Output is correct
20	Correct	90 ms	72952 KB	Output is correct
21	Correct	78 ms	72568 KB	Output is correct
22	Correct	205 ms	78960 KB	Output is correct
23	Correct	92 ms	72924 KB	Output is correct
24	Correct	304 ms	78120 KB	Output is correct
25	Correct	297 ms	82428 KB	Output is correct
26	Correct	76 ms	73080 KB	Output is correct
27	Correct	76 ms	73080 KB	Output is correct
28	Correct	77 ms	72924 KB	Output is correct
29	Correct	88 ms	73076 KB	Output is correct
30	Correct	75 ms	72924 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	72 ms	72696 KB	Output is correct
2	Correct	72 ms	72824 KB	Output is correct
3	Correct	73 ms	72696 KB	Output is correct
4	Correct	73 ms	72952 KB	Output is correct
5	Correct	72 ms	72696 KB	Output is correct
6	Correct	57 ms	62968 KB	Output is correct
7	Correct	57 ms	62968 KB	Output is correct
8	Correct	72 ms	72696 KB	Output is correct
9	Correct	73 ms	72740 KB	Output is correct
10	Correct	72 ms	72696 KB	Output is correct
11	Correct	72 ms	72696 KB	Output is correct
12	Correct	73 ms	72680 KB	Output is correct
13	Correct	73 ms	72696 KB	Output is correct
14	Correct	72 ms	72696 KB	Output is correct
15	Correct	80 ms	72724 KB	Output is correct
16	Correct	72 ms	72752 KB	Output is correct
17	Correct	73 ms	72696 KB	Output is correct
18	Correct	73 ms	72824 KB	Output is correct
19	Correct	74 ms	72800 KB	Output is correct
20	Correct	72 ms	72824 KB	Output is correct
21	Correct	72 ms	72696 KB	Output is correct
22	Correct	75 ms	72828 KB	Output is correct
23	Correct	73 ms	72704 KB	Output is correct
24	Correct	73 ms	72760 KB	Output is correct
25	Correct	73 ms	72768 KB	Output is correct
26	Correct	76 ms	72924 KB	Output is correct
27	Correct	76 ms	72928 KB	Output is correct
28	Correct	75 ms	72952 KB	Output is correct
29	Correct	76 ms	72952 KB	Output is correct
30	Correct	76 ms	72824 KB	Output is correct
31	Correct	72 ms	72696 KB	Output is correct
32	Correct	78 ms	73116 KB	Output is correct
33	Correct	72 ms	72824 KB	Output is correct
34	Correct	75 ms	72952 KB	Output is correct
35	Correct	75 ms	72952 KB	Output is correct
36	Correct	76 ms	72840 KB	Output is correct
37	Correct	77 ms	73012 KB	Output is correct
38	Correct	73 ms	72828 KB	Output is correct
39	Correct	76 ms	72952 KB	Output is correct
40	Correct	59 ms	63224 KB	Output is correct
41	Correct	76 ms	72952 KB	Output is correct
42	Correct	75 ms	72952 KB	Output is correct
43	Correct	59 ms	63352 KB	Output is correct
44	Correct	73 ms	72824 KB	Output is correct
45	Correct	76 ms	73052 KB	Output is correct
46	Correct	76 ms	72952 KB	Output is correct
47	Correct	84 ms	72752 KB	Output is correct
48	Correct	93 ms	72952 KB	Output is correct
49	Correct	75 ms	72952 KB	Output is correct
50	Correct	77 ms	73080 KB	Output is correct
51	Correct	76 ms	72856 KB	Output is correct
52	Correct	74 ms	72988 KB	Output is correct
53	Correct	75 ms	72916 KB	Output is correct
54	Correct	76 ms	72952 KB	Output is correct
55	Correct	74 ms	72816 KB	Output is correct
56	Correct	185 ms	77280 KB	Output is correct
57	Correct	233 ms	76916 KB	Output is correct
58	Correct	76 ms	72828 KB	Output is correct
59	Correct	72 ms	72824 KB	Output is correct
60	Correct	72 ms	72744 KB	Output is correct
61	Correct	236 ms	76940 KB	Output is correct
62	Correct	74 ms	73080 KB	Output is correct
63	Correct	326 ms	82524 KB	Output is correct
64	Correct	260 ms	77060 KB	Output is correct
65	Correct	75 ms	72828 KB	Output is correct
66	Correct	297 ms	77928 KB	Output is correct
67	Correct	60 ms	63224 KB	Output is correct
68	Correct	75 ms	72952 KB	Output is correct
69	Correct	180 ms	77712 KB	Output is correct
70	Correct	60 ms	63352 KB	Output is correct
71	Correct	179 ms	69092 KB	Output is correct
72	Correct	310 ms	80120 KB	Output is correct
73	Correct	74 ms	72696 KB	Output is correct
74	Correct	222 ms	75096 KB	Output is correct
75	Correct	288 ms	80376 KB	Output is correct
76	Correct	75 ms	72952 KB	Output is correct
77	Correct	77 ms	72952 KB	Output is correct
78	Correct	177 ms	77252 KB	Output is correct
79	Correct	219 ms	80120 KB	Output is correct
80	Correct	76 ms	72932 KB	Output is correct
81	Correct	83 ms	72896 KB	Output is correct
82	Correct	72 ms	72824 KB	Output is correct
83	Correct	72 ms	72680 KB	Output is correct
84	Correct	75 ms	72952 KB	Output is correct
85	Correct	284 ms	78392 KB	Output is correct
86	Correct	76 ms	72952 KB	Output is correct
87	Correct	243 ms	77304 KB	Output is correct
88	Correct	73 ms	72700 KB	Output is correct
89	Correct	299 ms	77708 KB	Output is correct
90	Correct	396 ms	78712 KB	Output is correct
91	Correct	267 ms	80376 KB	Output is correct
92	Correct	182 ms	77552 KB	Output is correct
93	Correct	76 ms	72952 KB	Output is correct
94	Correct	73 ms	72824 KB	Output is correct
95	Correct	210 ms	80192 KB	Output is correct
96	Correct	337 ms	85496 KB	Output is correct
97	Correct	90 ms	72952 KB	Output is correct
98	Correct	78 ms	72568 KB	Output is correct
99	Correct	205 ms	78960 KB	Output is correct
100	Correct	92 ms	72924 KB	Output is correct
101	Correct	304 ms	78120 KB	Output is correct
102	Correct	297 ms	82428 KB	Output is correct
103	Correct	76 ms	73080 KB	Output is correct
104	Correct	76 ms	73080 KB	Output is correct
105	Correct	77 ms	72924 KB	Output is correct
106	Correct	88 ms	73076 KB	Output is correct
107	Correct	75 ms	72924 KB	Output is correct
108	Correct	1101 ms	101504 KB	Output is correct
109	Correct	2151 ms	109620 KB	Output is correct
110	Correct	1392 ms	115208 KB	Output is correct
111	Correct	2158 ms	125756 KB	Output is correct
112	Correct	2118 ms	122984 KB	Output is correct
113	Correct	1151 ms	109004 KB	Output is correct
114	Incorrect	1290 ms	93988 KB	Output isn't correct
115	Halted	0 ms	0 KB	-

답안 #138094

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