답안 #164414

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
164414	2019-11-20T13:39:07 Z	tneluccus	Mergers (JOI19_mergers)	C++14	100 / 100	1880 ms	136932 KB

mergers

#include<bits/stdc++.h>
using namespace std;
const int N=5e5+2;
const int LOG=20;
int color[N],tin[N],tout[N],now=0,level[N],ancestor[N][LOG],head[N],cnt[N],deg[N];
vector<int> adj[N],lis[N];
int findd(int x){
	if(head[x]<0){
		return x;
	}
	int y=findd(head[x]);
	head[x]=y;
	return y;
}
void unionn(int x,int y){
	x=findd(x),y=findd(y);
	head[x]+=head[y];
	head[y]=x;
}
bool samee(int x,int y){
	return findd(x)==findd(y);
}
void dfs(int x,int p){
	now++;
	tin[x]=now;
	for(int i=1;i<LOG;i++){
		ancestor[x][i]=ancestor[ancestor[x][i-1]][i-1];
	}
	for(int i:adj[x]){
		if(i!=p){
			level[i]=level[x]+1;
			ancestor[i][0]=x;
			dfs(i,x);
		}
	}
	tout[x]=now;
}
int fin(int x,int y){
	while(y){
		int k=__lg(y);
		x=ancestor[x][k];
		y-=(1<<k);
	}
	return x;
}
int LCA(int x,int y){
	if(level[x]>level[y]){
		x=fin(x,level[x]-level[y]);
	}
	y=fin(y,level[y]-level[x]);
	if(x==y){
		return x;
	}
	for(int i=LOG-1;i>-1;i--){
		if(ancestor[x][i]!=ancestor[y][i]){
			x=ancestor[x][i],y=ancestor[y][i];
		}
	}
	return ancestor[x][0];
}
bool cmp(int x,int y){
	return tin[x]<tin[y];
}
void dfs1(int x,int p){
	for(int i:adj[x]){
		if(i!=p){
			dfs1(i,x);
			cnt[x]+=cnt[i];
		}
	}
	if(cnt[x]&&x!=p){
		unionn(x,p);
	}
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n,m,i,j,k,l,num,ans=0;
	cin>>n>>num;
	for(i=1;i<n;i++){
		cin>>j>>k;
		adj[j].push_back(k);
		adj[k].push_back(j);
	}
	for(i=1;i<=n;i++){
		head[i]=-1;
		cin>>color[i];
		lis[color[i]].push_back(i);
	}
	dfs(1,1);
	for(i=1;i<=num;i++){
		sort(lis[i].begin(),lis[i].end(),cmp);
		int sz=lis[i].size();
		for(j=1;j<sz;j++){
			k=LCA(lis[i][j-1],lis[i][j]);
			lis[i].push_back(k);
		}
		sort(lis[i].begin(),lis[i].end(),cmp);
		lis[i].erase(unique(lis[i].begin(),lis[i].end()),lis[i].end());
		for(j=1;j<lis[i].size();j++){
			k=LCA(lis[i][j-1],lis[i][j]);
			cnt[lis[i][j]]++;
			cnt[k]--;
		}
	}
	dfs1(1,1);
	for(i=1;i<=n;i++){
		for(j=0;j<adj[i].size();j++){
			if(findd(i)!=findd(adj[i][j])){
				deg[findd(i)]++;
				deg[findd(adj[i][j])]++;
			}
		}
	}
	for(i=1;i<=n;i++){
		if(findd(i)==i){
			if(deg[i]==2){
				ans++;
			}
		}
	}
	cout<<(ans+1)/2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:100:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=1;j<lis[i].size();j++){
           ~^~~~~~~~~~~~~~
mergers.cpp:108:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<adj[i].size();j++){
           ~^~~~~~~~~~~~~~
mergers.cpp:78:8: warning: unused variable 'm' [-Wunused-variable]
  int n,m,i,j,k,l,num,ans=0;
        ^
mergers.cpp:78:16: warning: unused variable 'l' [-Wunused-variable]
  int n,m,i,j,k,l,num,ans=0;
                ^

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	23928 KB	Output is correct
2	Correct	26 ms	23924 KB	Output is correct
3	Correct	56 ms	23916 KB	Output is correct
4	Correct	25 ms	23928 KB	Output is correct
5	Correct	25 ms	23840 KB	Output is correct
6	Correct	26 ms	23928 KB	Output is correct
7	Correct	25 ms	23932 KB	Output is correct
8	Correct	26 ms	23932 KB	Output is correct
9	Correct	25 ms	24056 KB	Output is correct
10	Correct	25 ms	23932 KB	Output is correct
11	Correct	25 ms	23928 KB	Output is correct
12	Correct	24 ms	23928 KB	Output is correct
13	Correct	25 ms	23932 KB	Output is correct
14	Correct	25 ms	23928 KB	Output is correct
15	Correct	26 ms	23928 KB	Output is correct
16	Correct	25 ms	23928 KB	Output is correct
17	Correct	26 ms	23928 KB	Output is correct
18	Correct	25 ms	23928 KB	Output is correct
19	Correct	25 ms	23928 KB	Output is correct
20	Correct	25 ms	23928 KB	Output is correct
21	Correct	26 ms	23944 KB	Output is correct
22	Correct	25 ms	23900 KB	Output is correct
23	Correct	27 ms	23928 KB	Output is correct
24	Correct	26 ms	23928 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	23928 KB	Output is correct
2	Correct	26 ms	23924 KB	Output is correct
3	Correct	56 ms	23916 KB	Output is correct
4	Correct	25 ms	23928 KB	Output is correct
5	Correct	25 ms	23840 KB	Output is correct
6	Correct	26 ms	23928 KB	Output is correct
7	Correct	25 ms	23932 KB	Output is correct
8	Correct	26 ms	23932 KB	Output is correct
9	Correct	25 ms	24056 KB	Output is correct
10	Correct	25 ms	23932 KB	Output is correct
11	Correct	25 ms	23928 KB	Output is correct
12	Correct	24 ms	23928 KB	Output is correct
13	Correct	25 ms	23932 KB	Output is correct
14	Correct	25 ms	23928 KB	Output is correct
15	Correct	26 ms	23928 KB	Output is correct
16	Correct	25 ms	23928 KB	Output is correct
17	Correct	26 ms	23928 KB	Output is correct
18	Correct	25 ms	23928 KB	Output is correct
19	Correct	25 ms	23928 KB	Output is correct
20	Correct	25 ms	23928 KB	Output is correct
21	Correct	26 ms	23944 KB	Output is correct
22	Correct	25 ms	23900 KB	Output is correct
23	Correct	27 ms	23928 KB	Output is correct
24	Correct	26 ms	23928 KB	Output is correct
25	Correct	26 ms	23912 KB	Output is correct
26	Correct	29 ms	24440 KB	Output is correct
27	Correct	43 ms	24312 KB	Output is correct
28	Correct	29 ms	24560 KB	Output is correct
29	Correct	29 ms	24440 KB	Output is correct
30	Correct	29 ms	24440 KB	Output is correct
31	Correct	26 ms	23928 KB	Output is correct
32	Correct	29 ms	24568 KB	Output is correct
33	Correct	26 ms	23928 KB	Output is correct
34	Correct	28 ms	24440 KB	Output is correct
35	Correct	28 ms	24440 KB	Output is correct
36	Correct	30 ms	24440 KB	Output is correct
37	Correct	29 ms	24440 KB	Output is correct
38	Correct	25 ms	23928 KB	Output is correct
39	Correct	29 ms	24440 KB	Output is correct
40	Correct	29 ms	24412 KB	Output is correct
41	Correct	29 ms	24440 KB	Output is correct
42	Correct	29 ms	24440 KB	Output is correct
43	Correct	37 ms	24568 KB	Output is correct
44	Correct	26 ms	23928 KB	Output is correct
45	Correct	29 ms	24516 KB	Output is correct
46	Correct	29 ms	24440 KB	Output is correct
47	Correct	25 ms	23928 KB	Output is correct
48	Correct	27 ms	24380 KB	Output is correct
49	Correct	28 ms	24440 KB	Output is correct
50	Correct	30 ms	24444 KB	Output is correct
51	Correct	29 ms	24440 KB	Output is correct
52	Correct	28 ms	24440 KB	Output is correct
53	Correct	28 ms	24360 KB	Output is correct
54	Correct	30 ms	24312 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	23928 KB	Output is correct
2	Correct	26 ms	23924 KB	Output is correct
3	Correct	56 ms	23916 KB	Output is correct
4	Correct	25 ms	23928 KB	Output is correct
5	Correct	25 ms	23840 KB	Output is correct
6	Correct	26 ms	23928 KB	Output is correct
7	Correct	25 ms	23932 KB	Output is correct
8	Correct	26 ms	23932 KB	Output is correct
9	Correct	25 ms	24056 KB	Output is correct
10	Correct	25 ms	23932 KB	Output is correct
11	Correct	25 ms	23928 KB	Output is correct
12	Correct	24 ms	23928 KB	Output is correct
13	Correct	25 ms	23932 KB	Output is correct
14	Correct	25 ms	23928 KB	Output is correct
15	Correct	26 ms	23928 KB	Output is correct
16	Correct	25 ms	23928 KB	Output is correct
17	Correct	26 ms	23928 KB	Output is correct
18	Correct	25 ms	23928 KB	Output is correct
19	Correct	25 ms	23928 KB	Output is correct
20	Correct	25 ms	23928 KB	Output is correct
21	Correct	26 ms	23944 KB	Output is correct
22	Correct	25 ms	23900 KB	Output is correct
23	Correct	27 ms	23928 KB	Output is correct
24	Correct	26 ms	23928 KB	Output is correct
25	Correct	27 ms	23928 KB	Output is correct
26	Correct	181 ms	40476 KB	Output is correct
27	Correct	222 ms	39672 KB	Output is correct
28	Correct	28 ms	24356 KB	Output is correct
29	Correct	25 ms	23928 KB	Output is correct
30	Correct	26 ms	23936 KB	Output is correct
31	Correct	218 ms	39800 KB	Output is correct
32	Correct	29 ms	24356 KB	Output is correct
33	Correct	255 ms	45468 KB	Output is correct
34	Correct	238 ms	39672 KB	Output is correct
35	Correct	29 ms	24440 KB	Output is correct
36	Correct	230 ms	40440 KB	Output is correct
37	Correct	30 ms	24440 KB	Output is correct
38	Correct	29 ms	24312 KB	Output is correct
39	Correct	231 ms	40560 KB	Output is correct
40	Correct	30 ms	24568 KB	Output is correct
41	Correct	240 ms	39588 KB	Output is correct
42	Correct	238 ms	41600 KB	Output is correct
43	Correct	26 ms	23928 KB	Output is correct
44	Correct	269 ms	45544 KB	Output is correct
45	Correct	253 ms	42680 KB	Output is correct
46	Correct	29 ms	24440 KB	Output is correct
47	Correct	29 ms	24316 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	166 ms	40432 KB	Output is correct
2	Correct	136 ms	42480 KB	Output is correct
3	Correct	28 ms	24440 KB	Output is correct
4	Correct	28 ms	24312 KB	Output is correct
5	Correct	25 ms	23928 KB	Output is correct
6	Correct	25 ms	23928 KB	Output is correct
7	Correct	28 ms	24440 KB	Output is correct
8	Correct	289 ms	41520 KB	Output is correct
9	Correct	28 ms	24440 KB	Output is correct
10	Correct	197 ms	40440 KB	Output is correct
11	Correct	63 ms	23928 KB	Output is correct
12	Correct	186 ms	40196 KB	Output is correct
13	Correct	207 ms	41428 KB	Output is correct
14	Correct	180 ms	42752 KB	Output is correct
15	Correct	172 ms	40688 KB	Output is correct
16	Correct	30 ms	24440 KB	Output is correct
17	Correct	25 ms	23928 KB	Output is correct
18	Correct	153 ms	42732 KB	Output is correct
19	Correct	198 ms	45816 KB	Output is correct
20	Correct	29 ms	24436 KB	Output is correct
21	Correct	25 ms	23928 KB	Output is correct
22	Correct	191 ms	42828 KB	Output is correct
23	Correct	28 ms	24440 KB	Output is correct
24	Correct	209 ms	40824 KB	Output is correct
25	Correct	186 ms	44780 KB	Output is correct
26	Correct	28 ms	24440 KB	Output is correct
27	Correct	29 ms	24440 KB	Output is correct
28	Correct	29 ms	24432 KB	Output is correct
29	Correct	30 ms	24440 KB	Output is correct
30	Correct	28 ms	24440 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	25 ms	23928 KB	Output is correct
2	Correct	26 ms	23924 KB	Output is correct
3	Correct	56 ms	23916 KB	Output is correct
4	Correct	25 ms	23928 KB	Output is correct
5	Correct	25 ms	23840 KB	Output is correct
6	Correct	26 ms	23928 KB	Output is correct
7	Correct	25 ms	23932 KB	Output is correct
8	Correct	26 ms	23932 KB	Output is correct
9	Correct	25 ms	24056 KB	Output is correct
10	Correct	25 ms	23932 KB	Output is correct
11	Correct	25 ms	23928 KB	Output is correct
12	Correct	24 ms	23928 KB	Output is correct
13	Correct	25 ms	23932 KB	Output is correct
14	Correct	25 ms	23928 KB	Output is correct
15	Correct	26 ms	23928 KB	Output is correct
16	Correct	25 ms	23928 KB	Output is correct
17	Correct	26 ms	23928 KB	Output is correct
18	Correct	25 ms	23928 KB	Output is correct
19	Correct	25 ms	23928 KB	Output is correct
20	Correct	25 ms	23928 KB	Output is correct
21	Correct	26 ms	23944 KB	Output is correct
22	Correct	25 ms	23900 KB	Output is correct
23	Correct	27 ms	23928 KB	Output is correct
24	Correct	26 ms	23928 KB	Output is correct
25	Correct	26 ms	23912 KB	Output is correct
26	Correct	29 ms	24440 KB	Output is correct
27	Correct	43 ms	24312 KB	Output is correct
28	Correct	29 ms	24560 KB	Output is correct
29	Correct	29 ms	24440 KB	Output is correct
30	Correct	29 ms	24440 KB	Output is correct
31	Correct	26 ms	23928 KB	Output is correct
32	Correct	29 ms	24568 KB	Output is correct
33	Correct	26 ms	23928 KB	Output is correct
34	Correct	28 ms	24440 KB	Output is correct
35	Correct	28 ms	24440 KB	Output is correct
36	Correct	30 ms	24440 KB	Output is correct
37	Correct	29 ms	24440 KB	Output is correct
38	Correct	25 ms	23928 KB	Output is correct
39	Correct	29 ms	24440 KB	Output is correct
40	Correct	29 ms	24412 KB	Output is correct
41	Correct	29 ms	24440 KB	Output is correct
42	Correct	29 ms	24440 KB	Output is correct
43	Correct	37 ms	24568 KB	Output is correct
44	Correct	26 ms	23928 KB	Output is correct
45	Correct	29 ms	24516 KB	Output is correct
46	Correct	29 ms	24440 KB	Output is correct
47	Correct	25 ms	23928 KB	Output is correct
48	Correct	27 ms	24380 KB	Output is correct
49	Correct	28 ms	24440 KB	Output is correct
50	Correct	30 ms	24444 KB	Output is correct
51	Correct	29 ms	24440 KB	Output is correct
52	Correct	28 ms	24440 KB	Output is correct
53	Correct	28 ms	24360 KB	Output is correct
54	Correct	30 ms	24312 KB	Output is correct
55	Correct	27 ms	23928 KB	Output is correct
56	Correct	181 ms	40476 KB	Output is correct
57	Correct	222 ms	39672 KB	Output is correct
58	Correct	28 ms	24356 KB	Output is correct
59	Correct	25 ms	23928 KB	Output is correct
60	Correct	26 ms	23936 KB	Output is correct
61	Correct	218 ms	39800 KB	Output is correct
62	Correct	29 ms	24356 KB	Output is correct
63	Correct	255 ms	45468 KB	Output is correct
64	Correct	238 ms	39672 KB	Output is correct
65	Correct	29 ms	24440 KB	Output is correct
66	Correct	230 ms	40440 KB	Output is correct
67	Correct	30 ms	24440 KB	Output is correct
68	Correct	29 ms	24312 KB	Output is correct
69	Correct	231 ms	40560 KB	Output is correct
70	Correct	30 ms	24568 KB	Output is correct
71	Correct	240 ms	39588 KB	Output is correct
72	Correct	238 ms	41600 KB	Output is correct
73	Correct	26 ms	23928 KB	Output is correct
74	Correct	269 ms	45544 KB	Output is correct
75	Correct	253 ms	42680 KB	Output is correct
76	Correct	29 ms	24440 KB	Output is correct
77	Correct	29 ms	24316 KB	Output is correct
78	Correct	166 ms	40432 KB	Output is correct
79	Correct	136 ms	42480 KB	Output is correct
80	Correct	28 ms	24440 KB	Output is correct
81	Correct	28 ms	24312 KB	Output is correct
82	Correct	25 ms	23928 KB	Output is correct
83	Correct	25 ms	23928 KB	Output is correct
84	Correct	28 ms	24440 KB	Output is correct
85	Correct	289 ms	41520 KB	Output is correct
86	Correct	28 ms	24440 KB	Output is correct
87	Correct	197 ms	40440 KB	Output is correct
88	Correct	63 ms	23928 KB	Output is correct
89	Correct	186 ms	40196 KB	Output is correct
90	Correct	207 ms	41428 KB	Output is correct
91	Correct	180 ms	42752 KB	Output is correct
92	Correct	172 ms	40688 KB	Output is correct
93	Correct	30 ms	24440 KB	Output is correct
94	Correct	25 ms	23928 KB	Output is correct
95	Correct	153 ms	42732 KB	Output is correct
96	Correct	198 ms	45816 KB	Output is correct
97	Correct	29 ms	24436 KB	Output is correct
98	Correct	25 ms	23928 KB	Output is correct
99	Correct	191 ms	42828 KB	Output is correct
100	Correct	28 ms	24440 KB	Output is correct
101	Correct	209 ms	40824 KB	Output is correct
102	Correct	186 ms	44780 KB	Output is correct
103	Correct	28 ms	24440 KB	Output is correct
104	Correct	29 ms	24440 KB	Output is correct
105	Correct	29 ms	24432 KB	Output is correct
106	Correct	30 ms	24440 KB	Output is correct
107	Correct	28 ms	24440 KB	Output is correct
108	Correct	1179 ms	116836 KB	Output is correct
109	Correct	1824 ms	116940 KB	Output is correct
110	Correct	1880 ms	125972 KB	Output is correct
111	Correct	1408 ms	136932 KB	Output is correct
112	Correct	1440 ms	129304 KB	Output is correct
113	Correct	969 ms	119336 KB	Output is correct
114	Correct	1568 ms	102800 KB	Output is correct
115	Correct	1645 ms	102604 KB	Output is correct
116	Correct	1446 ms	109732 KB	Output is correct
117	Correct	1214 ms	118496 KB	Output is correct
118	Correct	1299 ms	105496 KB	Output is correct
119	Correct	1140 ms	118492 KB	Output is correct
120	Correct	1315 ms	129528 KB	Output is correct
121	Correct	1169 ms	118564 KB	Output is correct
122	Correct	1352 ms	113984 KB	Output is correct
123	Correct	847 ms	118092 KB	Output is correct
124	Correct	1185 ms	116432 KB	Output is correct

답안 #164414

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