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답안 #772874

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
772874 2023-07-04T12:09:15 Z Mohammad_Parsa Mergers (JOI19_mergers) C++17
100 / 100
 1039 ms 145512 KB 
/* in the name of allah */
#include<bits/stdc++.h>
using namespace std;

#define endl '\n'
#define pb push_back
#define F first
#define S second
#define mk make_pair
typedef long long ll;

const int N=5e5+7,lg=21;
int n,k,st[N],fn[N],t,r,s[N],mark[N],sum[N],ans,h[N],mn[N],sp[N][lg],P[N];
vector<int>vec[N],ver[N],x;

int lca(){
	int m=N,g;
	for(auto u:x){
		if(h[u]<m){
			m=h[u];
			g=u;
		}
	}
	for(int i=lg-1;i>=0;i--){
		for(int j=0;j<x.size();j++){
			int u=x[j];
			if(h[sp[u][i]]>=m){
				x[j]=sp[u][i];
			}
		}
	}
	int f=1;
	for(auto u:x){
		if(u!=g)f=0;
	}
	if(f)return g;
	for(int i=lg-1;i>=0;i--){
		f=0;
		for(int j=1;j<x.size();j++){
			if(sp[x[j]][i]!=sp[x[0]][i])f=1;
		}
		if(f){
			for(int j=0;j<x.size();j++){
				x[j]=sp[x[j]][i];
			}
		}
	}
	return sp[x[0]][0];
}

void dfs1(int v=1,int p=0){
	h[v]=h[p]+1;
	sp[v][0]=p;
	st[v]=t++;
	for(auto u:vec[v]){
		if(u!=p) dfs1(u,v);
	}
	fn[v]=t++;
}

void dfs2(int v=1,int p=0){
	mn[v]=h[P[s[v]]];
	for(auto u:vec[v]){
		if(u==p)continue;
		dfs2(u,v);
		sum[v]+=sum[u];
		mn[v]=min(mn[v],mn[u]);
	}
	if(v!=1 && h[v]<=mn[v])mark[v]=1;
	sum[v]+=mark[v];	
}

void dfs3(int v=1,int p=0){
	if(mark[v] && (sum[v]==1 || sum[v]==sum[1]))ans++;
	for(auto u:vec[v]){
		if(u==p)continue;
		dfs3(u,v);
	}
}

int main(){
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin>>n>>k;
	int u,v;
	for(int i=0;i<n-1;i++){
		cin>>u>>v;
		vec[u].pb(v);
		vec[v].pb(u);
	}
	for(int i=1;i<=n;i++){
		cin>>s[i];
		ver[s[i]].pb(i);
	}
	dfs1();
	for(int j=1;j<lg;j++){
		for(int i=1;i<=n;i++){
			sp[i][j]=sp[sp[i][j-1]][j-1];
		}
	}

	for(int i=1;i<=k;i++){
		x.clear();
		for(auto u:ver[i])x.pb(u);
		P[i]=lca();
	}
	dfs2();
	dfs3();
	cout<<ans/2+(ans%2==1);
}

Compilation message

mergers.cpp: In function 'int lca()':
mergers.cpp:25:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for(int j=0;j<x.size();j++){
      |               ~^~~~~~~~~
mergers.cpp:39:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   for(int j=1;j<x.size();j++){
      |               ~^~~~~~~~~
mergers.cpp:43:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    for(int j=0;j<x.size();j++){
      |                ~^~~~~~~~~
mergers.cpp:17:10: warning: 'g' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |  int m=N,g;
      |          ^

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23892 KB Output is correct
2 Correct 12 ms 23832 KB Output is correct
3 Correct 11 ms 23764 KB Output is correct
4 Correct 11 ms 23812 KB Output is correct
5 Correct 11 ms 23812 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23812 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23768 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23832 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23808 KB Output is correct
15 Correct 12 ms 23860 KB Output is correct
16 Correct 12 ms 23812 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23804 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23828 KB Output is correct
21 Correct 11 ms 23892 KB Output is correct
22 Correct 12 ms 23888 KB Output is correct
23 Correct 11 ms 23784 KB Output is correct
24 Correct 11 ms 23836 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23892 KB Output is correct
2 Correct 12 ms 23832 KB Output is correct
3 Correct 11 ms 23764 KB Output is correct
4 Correct 11 ms 23812 KB Output is correct
5 Correct 11 ms 23812 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23812 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23768 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23832 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23808 KB Output is correct
15 Correct 12 ms 23860 KB Output is correct
16 Correct 12 ms 23812 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23804 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23828 KB Output is correct
21 Correct 11 ms 23892 KB Output is correct
22 Correct 12 ms 23888 KB Output is correct
23 Correct 11 ms 23784 KB Output is correct
24 Correct 11 ms 23836 KB Output is correct
25 Correct 11 ms 23816 KB Output is correct
26 Correct 13 ms 24332 KB Output is correct
27 Correct 12 ms 24276 KB Output is correct
28 Correct 14 ms 24524 KB Output is correct
29 Correct 16 ms 24392 KB Output is correct
30 Correct 13 ms 24292 KB Output is correct
31 Correct 12 ms 23836 KB Output is correct
32 Correct 14 ms 24500 KB Output is correct
33 Correct 11 ms 23844 KB Output is correct
34 Correct 15 ms 24340 KB Output is correct
35 Correct 12 ms 24336 KB Output is correct
36 Correct 13 ms 24276 KB Output is correct
37 Correct 13 ms 24276 KB Output is correct
38 Correct 12 ms 23784 KB Output is correct
39 Correct 13 ms 24340 KB Output is correct
40 Correct 13 ms 24276 KB Output is correct
41 Correct 13 ms 24380 KB Output is correct
42 Correct 13 ms 24404 KB Output is correct
43 Correct 16 ms 24536 KB Output is correct
44 Correct 14 ms 23892 KB Output is correct
45 Correct 17 ms 24404 KB Output is correct
46 Correct 13 ms 24336 KB Output is correct
47 Correct 11 ms 23764 KB Output is correct
48 Correct 13 ms 24276 KB Output is correct
49 Correct 12 ms 24404 KB Output is correct
50 Correct 13 ms 24508 KB Output is correct
51 Correct 16 ms 24336 KB Output is correct
52 Correct 13 ms 24276 KB Output is correct
53 Correct 13 ms 24332 KB Output is correct
54 Correct 13 ms 24340 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23892 KB Output is correct
2 Correct 12 ms 23832 KB Output is correct
3 Correct 11 ms 23764 KB Output is correct
4 Correct 11 ms 23812 KB Output is correct
5 Correct 11 ms 23812 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23812 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23768 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23832 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23808 KB Output is correct
15 Correct 12 ms 23860 KB Output is correct
16 Correct 12 ms 23812 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23804 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23828 KB Output is correct
21 Correct 11 ms 23892 KB Output is correct
22 Correct 12 ms 23888 KB Output is correct
23 Correct 11 ms 23784 KB Output is correct
24 Correct 11 ms 23836 KB Output is correct
25 Correct 15 ms 23792 KB Output is correct
26 Correct 80 ms 39324 KB Output is correct
27 Correct 87 ms 39628 KB Output is correct
28 Correct 13 ms 24276 KB Output is correct
29 Correct 12 ms 23816 KB Output is correct
30 Correct 12 ms 23760 KB Output is correct
31 Correct 80 ms 39760 KB Output is correct
32 Correct 13 ms 24336 KB Output is correct
33 Correct 95 ms 46708 KB Output is correct
34 Correct 70 ms 39628 KB Output is correct
35 Correct 14 ms 24344 KB Output is correct
36 Correct 80 ms 40332 KB Output is correct
37 Correct 14 ms 24276 KB Output is correct
38 Correct 13 ms 24276 KB Output is correct
39 Correct 68 ms 39844 KB Output is correct
40 Correct 14 ms 24588 KB Output is correct
41 Correct 71 ms 39912 KB Output is correct
42 Correct 88 ms 41860 KB Output is correct
43 Correct 12 ms 23840 KB Output is correct
44 Correct 94 ms 47316 KB Output is correct
45 Correct 87 ms 43288 KB Output is correct
46 Correct 13 ms 24276 KB Output is correct
47 Correct 14 ms 24276 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 56 ms 39520 KB Output is correct
2 Correct 73 ms 42692 KB Output is correct
3 Correct 14 ms 24404 KB Output is correct
4 Correct 15 ms 24464 KB Output is correct
5 Correct 12 ms 23864 KB Output is correct
6 Correct 13 ms 23860 KB Output is correct
7 Correct 13 ms 24276 KB Output is correct
8 Correct 87 ms 41536 KB Output is correct
9 Correct 14 ms 24276 KB Output is correct
10 Correct 86 ms 40100 KB Output is correct
11 Correct 13 ms 23892 KB Output is correct
12 Correct 77 ms 40112 KB Output is correct
13 Correct 84 ms 41384 KB Output is correct
14 Correct 86 ms 43252 KB Output is correct
15 Correct 58 ms 39828 KB Output is correct
16 Correct 13 ms 24332 KB Output is correct
17 Correct 13 ms 23892 KB Output is correct
18 Correct 72 ms 43248 KB Output is correct
19 Correct 116 ms 47180 KB Output is correct
20 Correct 13 ms 24380 KB Output is correct
21 Correct 12 ms 23828 KB Output is correct
22 Correct 65 ms 41720 KB Output is correct
23 Correct 13 ms 24276 KB Output is correct
24 Correct 83 ms 40512 KB Output is correct
25 Correct 93 ms 45812 KB Output is correct
26 Correct 16 ms 24332 KB Output is correct
27 Correct 14 ms 24488 KB Output is correct
28 Correct 13 ms 24348 KB Output is correct
29 Correct 13 ms 24336 KB Output is correct
30 Correct 13 ms 24332 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23892 KB Output is correct
2 Correct 12 ms 23832 KB Output is correct
3 Correct 11 ms 23764 KB Output is correct
4 Correct 11 ms 23812 KB Output is correct
5 Correct 11 ms 23812 KB Output is correct
6 Correct 11 ms 23764 KB Output is correct
7 Correct 11 ms 23812 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 13 ms 23768 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23832 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23808 KB Output is correct
15 Correct 12 ms 23860 KB Output is correct
16 Correct 12 ms 23812 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 11 ms 23804 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23828 KB Output is correct
21 Correct 11 ms 23892 KB Output is correct
22 Correct 12 ms 23888 KB Output is correct
23 Correct 11 ms 23784 KB Output is correct
24 Correct 11 ms 23836 KB Output is correct
25 Correct 11 ms 23816 KB Output is correct
26 Correct 13 ms 24332 KB Output is correct
27 Correct 12 ms 24276 KB Output is correct
28 Correct 14 ms 24524 KB Output is correct
29 Correct 16 ms 24392 KB Output is correct
30 Correct 13 ms 24292 KB Output is correct
31 Correct 12 ms 23836 KB Output is correct
32 Correct 14 ms 24500 KB Output is correct
33 Correct 11 ms 23844 KB Output is correct
34 Correct 15 ms 24340 KB Output is correct
35 Correct 12 ms 24336 KB Output is correct
36 Correct 13 ms 24276 KB Output is correct
37 Correct 13 ms 24276 KB Output is correct
38 Correct 12 ms 23784 KB Output is correct
39 Correct 13 ms 24340 KB Output is correct
40 Correct 13 ms 24276 KB Output is correct
41 Correct 13 ms 24380 KB Output is correct
42 Correct 13 ms 24404 KB Output is correct
43 Correct 16 ms 24536 KB Output is correct
44 Correct 14 ms 23892 KB Output is correct
45 Correct 17 ms 24404 KB Output is correct
46 Correct 13 ms 24336 KB Output is correct
47 Correct 11 ms 23764 KB Output is correct
48 Correct 13 ms 24276 KB Output is correct
49 Correct 12 ms 24404 KB Output is correct
50 Correct 13 ms 24508 KB Output is correct
51 Correct 16 ms 24336 KB Output is correct
52 Correct 13 ms 24276 KB Output is correct
53 Correct 13 ms 24332 KB Output is correct
54 Correct 13 ms 24340 KB Output is correct
55 Correct 15 ms 23792 KB Output is correct
56 Correct 80 ms 39324 KB Output is correct
57 Correct 87 ms 39628 KB Output is correct
58 Correct 13 ms 24276 KB Output is correct
59 Correct 12 ms 23816 KB Output is correct
60 Correct 12 ms 23760 KB Output is correct
61 Correct 80 ms 39760 KB Output is correct
62 Correct 13 ms 24336 KB Output is correct
63 Correct 95 ms 46708 KB Output is correct
64 Correct 70 ms 39628 KB Output is correct
65 Correct 14 ms 24344 KB Output is correct
66 Correct 80 ms 40332 KB Output is correct
67 Correct 14 ms 24276 KB Output is correct
68 Correct 13 ms 24276 KB Output is correct
69 Correct 68 ms 39844 KB Output is correct
70 Correct 14 ms 24588 KB Output is correct
71 Correct 71 ms 39912 KB Output is correct
72 Correct 88 ms 41860 KB Output is correct
73 Correct 12 ms 23840 KB Output is correct
74 Correct 94 ms 47316 KB Output is correct
75 Correct 87 ms 43288 KB Output is correct
76 Correct 13 ms 24276 KB Output is correct
77 Correct 14 ms 24276 KB Output is correct
78 Correct 56 ms 39520 KB Output is correct
79 Correct 73 ms 42692 KB Output is correct
80 Correct 14 ms 24404 KB Output is correct
81 Correct 15 ms 24464 KB Output is correct
82 Correct 12 ms 23864 KB Output is correct
83 Correct 13 ms 23860 KB Output is correct
84 Correct 13 ms 24276 KB Output is correct
85 Correct 87 ms 41536 KB Output is correct
86 Correct 14 ms 24276 KB Output is correct
87 Correct 86 ms 40100 KB Output is correct
88 Correct 13 ms 23892 KB Output is correct
89 Correct 77 ms 40112 KB Output is correct
90 Correct 84 ms 41384 KB Output is correct
91 Correct 86 ms 43252 KB Output is correct
92 Correct 58 ms 39828 KB Output is correct
93 Correct 13 ms 24332 KB Output is correct
94 Correct 13 ms 23892 KB Output is correct
95 Correct 72 ms 43248 KB Output is correct
96 Correct 116 ms 47180 KB Output is correct
97 Correct 13 ms 24380 KB Output is correct
98 Correct 12 ms 23828 KB Output is correct
99 Correct 65 ms 41720 KB Output is correct
100 Correct 13 ms 24276 KB Output is correct
101 Correct 83 ms 40512 KB Output is correct
102 Correct 93 ms 45812 KB Output is correct
103 Correct 16 ms 24332 KB Output is correct
104 Correct 14 ms 24488 KB Output is correct
105 Correct 13 ms 24348 KB Output is correct
106 Correct 13 ms 24336 KB Output is correct
107 Correct 13 ms 24332 KB Output is correct
108 Correct 504 ms 113464 KB Output is correct
109 Correct 898 ms 121720 KB Output is correct
110 Correct 896 ms 133692 KB Output is correct
111 Correct 1039 ms 145512 KB Output is correct
112 Correct 988 ms 135532 KB Output is correct
113 Correct 544 ms 122124 KB Output is correct
114 Correct 611 ms 103532 KB Output is correct
115 Correct 618 ms 104404 KB Output is correct
116 Correct 685 ms 109340 KB Output is correct
117 Correct 773 ms 122356 KB Output is correct
118 Correct 647 ms 104476 KB Output is correct
119 Correct 790 ms 122368 KB Output is correct
120 Correct 951 ms 136212 KB Output is correct
121 Correct 811 ms 122348 KB Output is correct
122 Correct 725 ms 115280 KB Output is correct
123 Correct 560 ms 123832 KB Output is correct
124 Correct 948 ms 120184 KB Output is correct