Submission #126003

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
126003	2019-07-06T17:27:26 Z	TadijaSebez	Mergers (JOI19_mergers)	C++11	100 / 100	2306 ms	128972 KB

mergers

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=500050;
const int L=19;
vector<int> my[N],E[N];
int s[N],par[N][L],dep[N],sum[N];
void DFS(int u, int p)
{
	par[u][0]=p;
	dep[u]=dep[p]+1;
	for(int i=1;i<L;i++) par[u][i]=par[par[u][i-1]][i-1];
	for(int v:E[u]) if(v!=p) DFS(v,u);
}
int LCA(int u, int v)
{
	if(dep[u]<dep[v]) swap(u,v);
	for(int i=L-1;~i;i--) if(dep[par[u][i]]>=dep[v]) u=par[u][i];
	for(int i=L-1;~i;i--) if(par[u][i]!=par[v][i]) u=par[u][i],v=par[v][i];
	return u==v?v:par[v][0];
}
void Solve(int u, int p)
{
	for(int v:E[u]) if(v!=p) Solve(v,u),sum[u]+=sum[v];
}
int csz,deg[N];
void Compress(int u, int p, int c)
{
	for(int v:E[u]) if(v!=p)
	{
		if(sum[v]==0)
		{
			csz++;
			deg[c]++;
			deg[csz]++;
			Compress(v,u,csz);
		}
		else Compress(v,u,c);
	}
}
int main()
{
    int n,k,u,v;
	scanf("%i %i",&n,&k);
	for(int i=1;i<n;i++) scanf("%i %i",&u,&v),E[u].pb(v),E[v].pb(u);
	for(int i=1;i<=n;i++) scanf("%i",&s[i]),my[s[i]].pb(i);
	DFS(1,0);
	for(int i=1;i<=k;i++)
	{
		for(int j=1;j<my[i].size();j++)
		{
			int lca=LCA(my[i][j-1],my[i][j]);
			sum[my[i][j-1]]++;
			sum[my[i][j]]++;
			sum[lca]-=2;
		}
	}
	Solve(1,0);
	csz=1;
	Compress(1,0,1);
	int cnt=0;
	for(int i=1;i<=csz;i++) if(deg[i]==1) cnt++;
	int ans=cnt+1>>1;
	printf("%i\n",ans);
	return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:50:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=1;j<my[i].size();j++)
               ~^~~~~~~~~~~~~
mergers.cpp:63:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int ans=cnt+1>>1;
          ~~~^~
mergers.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&k);
  ~~~~~^~~~~~~~~~~~~~~
mergers.cpp:45:54: 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("%i %i",&u,&v),E[u].pb(v),E[v].pb(u);
                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
mergers.cpp:46:41: 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("%i",&s[i]),my[s[i]].pb(i);
                        ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	23 ms	23928 KB	Output is correct
4	Correct	23 ms	23928 KB	Output is correct
5	Correct	24 ms	23928 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	23 ms	23872 KB	Output is correct
8	Correct	23 ms	23928 KB	Output is correct
9	Correct	23 ms	23928 KB	Output is correct
10	Correct	23 ms	23864 KB	Output is correct
11	Correct	23 ms	23800 KB	Output is correct
12	Correct	23 ms	23804 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	23 ms	23928 KB	Output is correct
15	Correct	23 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23928 KB	Output is correct
19	Correct	23 ms	23800 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23804 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23832 KB	Output is correct

Subtask #2
24.0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	23 ms	23928 KB	Output is correct
4	Correct	23 ms	23928 KB	Output is correct
5	Correct	24 ms	23928 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	23 ms	23872 KB	Output is correct
8	Correct	23 ms	23928 KB	Output is correct
9	Correct	23 ms	23928 KB	Output is correct
10	Correct	23 ms	23864 KB	Output is correct
11	Correct	23 ms	23800 KB	Output is correct
12	Correct	23 ms	23804 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	23 ms	23928 KB	Output is correct
15	Correct	23 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23928 KB	Output is correct
19	Correct	23 ms	23800 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23804 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23832 KB	Output is correct
25	Correct	23 ms	24056 KB	Output is correct
26	Correct	26 ms	24312 KB	Output is correct
27	Correct	26 ms	24312 KB	Output is correct
28	Correct	31 ms	24440 KB	Output is correct
29	Correct	32 ms	24316 KB	Output is correct
30	Correct	27 ms	24312 KB	Output is correct
31	Correct	23 ms	23800 KB	Output is correct
32	Correct	26 ms	24440 KB	Output is correct
33	Correct	23 ms	23800 KB	Output is correct
34	Correct	25 ms	24312 KB	Output is correct
35	Correct	26 ms	24312 KB	Output is correct
36	Correct	26 ms	24184 KB	Output is correct
37	Correct	27 ms	24312 KB	Output is correct
38	Correct	23 ms	23800 KB	Output is correct
39	Correct	26 ms	24312 KB	Output is correct
40	Correct	27 ms	24312 KB	Output is correct
41	Correct	26 ms	24184 KB	Output is correct
42	Correct	26 ms	24316 KB	Output is correct
43	Correct	27 ms	24440 KB	Output is correct
44	Correct	23 ms	23800 KB	Output is correct
45	Correct	26 ms	24420 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	23 ms	23788 KB	Output is correct
48	Correct	26 ms	24320 KB	Output is correct
49	Correct	25 ms	24312 KB	Output is correct
50	Correct	25 ms	24440 KB	Output is correct
51	Correct	30 ms	24312 KB	Output is correct
52	Correct	26 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	26 ms	24312 KB	Output is correct

Subtask #3
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	23 ms	23928 KB	Output is correct
4	Correct	23 ms	23928 KB	Output is correct
5	Correct	24 ms	23928 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	23 ms	23872 KB	Output is correct
8	Correct	23 ms	23928 KB	Output is correct
9	Correct	23 ms	23928 KB	Output is correct
10	Correct	23 ms	23864 KB	Output is correct
11	Correct	23 ms	23800 KB	Output is correct
12	Correct	23 ms	23804 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	23 ms	23928 KB	Output is correct
15	Correct	23 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23928 KB	Output is correct
19	Correct	23 ms	23800 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23804 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23832 KB	Output is correct
25	Correct	23 ms	23800 KB	Output is correct
26	Correct	140 ms	37996 KB	Output is correct
27	Correct	169 ms	37596 KB	Output is correct
28	Correct	26 ms	24184 KB	Output is correct
29	Correct	23 ms	23928 KB	Output is correct
30	Correct	23 ms	23928 KB	Output is correct
31	Correct	172 ms	37596 KB	Output is correct
32	Correct	25 ms	24312 KB	Output is correct
33	Correct	270 ms	43412 KB	Output is correct
34	Correct	177 ms	37724 KB	Output is correct
35	Correct	26 ms	24312 KB	Output is correct
36	Correct	206 ms	38264 KB	Output is correct
37	Correct	26 ms	24312 KB	Output is correct
38	Correct	26 ms	24184 KB	Output is correct
39	Correct	142 ms	38064 KB	Output is correct
40	Correct	27 ms	24440 KB	Output is correct
41	Correct	178 ms	37592 KB	Output is correct
42	Correct	295 ms	39416 KB	Output is correct
43	Correct	24 ms	23804 KB	Output is correct
44	Correct	283 ms	43580 KB	Output is correct
45	Correct	215 ms	40568 KB	Output is correct
46	Correct	28 ms	24320 KB	Output is correct
47	Correct	29 ms	24316 KB	Output is correct

Subtask #4
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	165 ms	38000 KB	Output is correct
2	Correct	120 ms	40900 KB	Output is correct
3	Correct	26 ms	24312 KB	Output is correct
4	Correct	27 ms	24312 KB	Output is correct
5	Correct	23 ms	23800 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	26 ms	24312 KB	Output is correct
8	Correct	181 ms	39032 KB	Output is correct
9	Correct	49 ms	24184 KB	Output is correct
10	Correct	203 ms	37812 KB	Output is correct
11	Correct	24 ms	23800 KB	Output is correct
12	Correct	206 ms	37852 KB	Output is correct
13	Correct	188 ms	39032 KB	Output is correct
14	Correct	172 ms	41052 KB	Output is correct
15	Correct	141 ms	37872 KB	Output is correct
16	Correct	25 ms	24312 KB	Output is correct
17	Correct	29 ms	23928 KB	Output is correct
18	Correct	137 ms	40844 KB	Output is correct
19	Correct	182 ms	44152 KB	Output is correct
20	Correct	27 ms	24312 KB	Output is correct
21	Correct	23 ms	23800 KB	Output is correct
22	Correct	134 ms	39280 KB	Output is correct
23	Correct	27 ms	24312 KB	Output is correct
24	Correct	191 ms	38200 KB	Output is correct
25	Correct	160 ms	43000 KB	Output is correct
26	Correct	25 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	26 ms	24312 KB	Output is correct
30	Correct	25 ms	24312 KB	Output is correct

Subtask #5
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	23 ms	23800 KB	Output is correct
2	Correct	23 ms	23800 KB	Output is correct
3	Correct	23 ms	23928 KB	Output is correct
4	Correct	23 ms	23928 KB	Output is correct
5	Correct	24 ms	23928 KB	Output is correct
6	Correct	23 ms	23928 KB	Output is correct
7	Correct	23 ms	23872 KB	Output is correct
8	Correct	23 ms	23928 KB	Output is correct
9	Correct	23 ms	23928 KB	Output is correct
10	Correct	23 ms	23864 KB	Output is correct
11	Correct	23 ms	23800 KB	Output is correct
12	Correct	23 ms	23804 KB	Output is correct
13	Correct	23 ms	23928 KB	Output is correct
14	Correct	23 ms	23928 KB	Output is correct
15	Correct	23 ms	23928 KB	Output is correct
16	Correct	23 ms	23800 KB	Output is correct
17	Correct	23 ms	23928 KB	Output is correct
18	Correct	24 ms	23928 KB	Output is correct
19	Correct	23 ms	23800 KB	Output is correct
20	Correct	23 ms	23800 KB	Output is correct
21	Correct	23 ms	23804 KB	Output is correct
22	Correct	23 ms	23800 KB	Output is correct
23	Correct	23 ms	23800 KB	Output is correct
24	Correct	23 ms	23832 KB	Output is correct
25	Correct	23 ms	24056 KB	Output is correct
26	Correct	26 ms	24312 KB	Output is correct
27	Correct	26 ms	24312 KB	Output is correct
28	Correct	31 ms	24440 KB	Output is correct
29	Correct	32 ms	24316 KB	Output is correct
30	Correct	27 ms	24312 KB	Output is correct
31	Correct	23 ms	23800 KB	Output is correct
32	Correct	26 ms	24440 KB	Output is correct
33	Correct	23 ms	23800 KB	Output is correct
34	Correct	25 ms	24312 KB	Output is correct
35	Correct	26 ms	24312 KB	Output is correct
36	Correct	26 ms	24184 KB	Output is correct
37	Correct	27 ms	24312 KB	Output is correct
38	Correct	23 ms	23800 KB	Output is correct
39	Correct	26 ms	24312 KB	Output is correct
40	Correct	27 ms	24312 KB	Output is correct
41	Correct	26 ms	24184 KB	Output is correct
42	Correct	26 ms	24316 KB	Output is correct
43	Correct	27 ms	24440 KB	Output is correct
44	Correct	23 ms	23800 KB	Output is correct
45	Correct	26 ms	24420 KB	Output is correct
46	Correct	26 ms	24312 KB	Output is correct
47	Correct	23 ms	23788 KB	Output is correct
48	Correct	26 ms	24320 KB	Output is correct
49	Correct	25 ms	24312 KB	Output is correct
50	Correct	25 ms	24440 KB	Output is correct
51	Correct	30 ms	24312 KB	Output is correct
52	Correct	26 ms	24312 KB	Output is correct
53	Correct	26 ms	24312 KB	Output is correct
54	Correct	26 ms	24312 KB	Output is correct
55	Correct	23 ms	23800 KB	Output is correct
56	Correct	140 ms	37996 KB	Output is correct
57	Correct	169 ms	37596 KB	Output is correct
58	Correct	26 ms	24184 KB	Output is correct
59	Correct	23 ms	23928 KB	Output is correct
60	Correct	23 ms	23928 KB	Output is correct
61	Correct	172 ms	37596 KB	Output is correct
62	Correct	25 ms	24312 KB	Output is correct
63	Correct	270 ms	43412 KB	Output is correct
64	Correct	177 ms	37724 KB	Output is correct
65	Correct	26 ms	24312 KB	Output is correct
66	Correct	206 ms	38264 KB	Output is correct
67	Correct	26 ms	24312 KB	Output is correct
68	Correct	26 ms	24184 KB	Output is correct
69	Correct	142 ms	38064 KB	Output is correct
70	Correct	27 ms	24440 KB	Output is correct
71	Correct	178 ms	37592 KB	Output is correct
72	Correct	295 ms	39416 KB	Output is correct
73	Correct	24 ms	23804 KB	Output is correct
74	Correct	283 ms	43580 KB	Output is correct
75	Correct	215 ms	40568 KB	Output is correct
76	Correct	28 ms	24320 KB	Output is correct
77	Correct	29 ms	24316 KB	Output is correct
78	Correct	165 ms	38000 KB	Output is correct
79	Correct	120 ms	40900 KB	Output is correct
80	Correct	26 ms	24312 KB	Output is correct
81	Correct	27 ms	24312 KB	Output is correct
82	Correct	23 ms	23800 KB	Output is correct
83	Correct	23 ms	23928 KB	Output is correct
84	Correct	26 ms	24312 KB	Output is correct
85	Correct	181 ms	39032 KB	Output is correct
86	Correct	49 ms	24184 KB	Output is correct
87	Correct	203 ms	37812 KB	Output is correct
88	Correct	24 ms	23800 KB	Output is correct
89	Correct	206 ms	37852 KB	Output is correct
90	Correct	188 ms	39032 KB	Output is correct
91	Correct	172 ms	41052 KB	Output is correct
92	Correct	141 ms	37872 KB	Output is correct
93	Correct	25 ms	24312 KB	Output is correct
94	Correct	29 ms	23928 KB	Output is correct
95	Correct	137 ms	40844 KB	Output is correct
96	Correct	182 ms	44152 KB	Output is correct
97	Correct	27 ms	24312 KB	Output is correct
98	Correct	23 ms	23800 KB	Output is correct
99	Correct	134 ms	39280 KB	Output is correct
100	Correct	27 ms	24312 KB	Output is correct
101	Correct	191 ms	38200 KB	Output is correct
102	Correct	160 ms	43000 KB	Output is correct
103	Correct	25 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	26 ms	24312 KB	Output is correct
107	Correct	25 ms	24312 KB	Output is correct
108	Correct	821 ms	101132 KB	Output is correct
109	Correct	1969 ms	107008 KB	Output is correct
110	Correct	2306 ms	116168 KB	Output is correct
111	Correct	1378 ms	128972 KB	Output is correct
112	Correct	1149 ms	120324 KB	Output is correct
113	Correct	728 ms	110168 KB	Output is correct
114	Correct	1040 ms	92900 KB	Output is correct
115	Correct	1041 ms	92872 KB	Output is correct
116	Correct	1249 ms	97528 KB	Output is correct
117	Correct	1008 ms	110824 KB	Output is correct
118	Correct	1178 ms	93304 KB	Output is correct
119	Correct	1055 ms	110764 KB	Output is correct
120	Correct	1139 ms	121780 KB	Output is correct
121	Correct	1008 ms	110712 KB	Output is correct
122	Correct	1133 ms	102728 KB	Output is correct
123	Correct	725 ms	110436 KB	Output is correct
124	Correct	1088 ms	108152 KB	Output is correct

Submission #126003

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