답안 #743347

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
743347	2023-05-17T10:12:47 Z	myrcella	Mergers (JOI19_mergers)	C++17	100 / 100	1448 ms	119944 KB

mergers

//by szh
#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 5e5+10;

int n,m;
vector <int> edge[maxn];
int dep[maxn];
int f[maxn];
int deg[maxn];
vector <int> node[maxn];
int col[maxn];
int par[maxn];
int fnode[maxn];

void dfs(int u,int fa) {
	par[u] = fa;
	dep[u] = dep[fa] + 1;
	for (int v:edge[u]) {
		if (v==fa) continue;
		dfs(v,u);
	}
	return;
}

int getf(int x) {
	if (f[x]==x) return x;
	else return f[x] = getf(f[x]);
}

int getfnode(int x) {
	if (fnode[x]==x) return x;
	else return fnode[x] = getfnode(fnode[x]);
}

void merge(int x,int y) {
	f[getf(x)] = getf(y);
}

void update(int u,int v) {
	u = getfnode(u), v = getfnode(v);
	while (u!=v) {
		int uu = u,vv=v;
		if (dep[u]>dep[v]) u = getfnode(par[u]),fnode[getfnode(uu)] = getfnode(u);
		else v = getfnode(par[v]),fnode[getfnode(vv)] = getfnode(v);
		merge(col[u],col[v]);
		
	}
	return;
}

map <pii,int> mp;

int main() {
//	freopen("input.txt","r",stdin);	
	std::ios::sync_with_stdio(false);cin.tie(0);
	cin>>n>>m;
	rep(i,1,m+1) f[i] = i;
	rep(i,1,n+1) fnode[i] = i;
	rep(i,1,n) {
		int u,v;
		cin>>u>>v;
		edge[u].pb(v);
		edge[v].pb(u);
	}
	dfs(1,0);
	rep(i,1,n+1) {
		int c;cin>>c;
		col[i] = c;
		node[c].pb(i);
	}
//	rep(i,1,n+1)
//		rep(j,1,i) if (col[i]==col[j]) update(i,j);
	rep(i,1,m+1) {
		if (node[i].empty()) continue;
		int tmp = node[i][0];
		rep(j,1,SZ(node[i])) update(tmp,node[i][j]);
	}
	rep(i,1,n+1) 
		for (int v:edge[i]) {
			int fx = getf(col[i]), fy = getf(col[v]);
			if (fx==fy) continue;
			if (fx>fy) swap(fx,fy);
			if (mp.find({fx,fy})!=mp.end()) continue;
			mp[{fx,fy}]=1;
			deg[fx]++;
			deg[fy]++;
		}
	int hii = 0;
	int cnt = 0;
	rep(i,1,m+1) {
		if (getf(i)==i) hii++;
		if (getf(i)==i and deg[i]==1) cnt++;
	}
	assert(SZ(mp)==hii-1);
	cout<<(cnt+1)/2;
	return 0;
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	23764 KB	Output is correct
2	Correct	12 ms	23756 KB	Output is correct
3	Correct	12 ms	23792 KB	Output is correct
4	Correct	14 ms	23832 KB	Output is correct
5	Correct	12 ms	23780 KB	Output is correct
6	Correct	12 ms	23860 KB	Output is correct
7	Correct	13 ms	23764 KB	Output is correct
8	Correct	13 ms	23852 KB	Output is correct
9	Correct	12 ms	23848 KB	Output is correct
10	Correct	12 ms	23824 KB	Output is correct
11	Correct	12 ms	23764 KB	Output is correct
12	Correct	12 ms	23764 KB	Output is correct
13	Correct	12 ms	23776 KB	Output is correct
14	Correct	14 ms	23764 KB	Output is correct
15	Correct	12 ms	23764 KB	Output is correct
16	Correct	12 ms	23764 KB	Output is correct
17	Correct	12 ms	23764 KB	Output is correct
18	Correct	12 ms	23780 KB	Output is correct
19	Correct	12 ms	23836 KB	Output is correct
20	Correct	12 ms	23832 KB	Output is correct
21	Correct	12 ms	23764 KB	Output is correct
22	Correct	12 ms	23764 KB	Output is correct
23	Correct	12 ms	23848 KB	Output is correct
24	Correct	13 ms	23852 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	23764 KB	Output is correct
2	Correct	12 ms	23756 KB	Output is correct
3	Correct	12 ms	23792 KB	Output is correct
4	Correct	14 ms	23832 KB	Output is correct
5	Correct	12 ms	23780 KB	Output is correct
6	Correct	12 ms	23860 KB	Output is correct
7	Correct	13 ms	23764 KB	Output is correct
8	Correct	13 ms	23852 KB	Output is correct
9	Correct	12 ms	23848 KB	Output is correct
10	Correct	12 ms	23824 KB	Output is correct
11	Correct	12 ms	23764 KB	Output is correct
12	Correct	12 ms	23764 KB	Output is correct
13	Correct	12 ms	23776 KB	Output is correct
14	Correct	14 ms	23764 KB	Output is correct
15	Correct	12 ms	23764 KB	Output is correct
16	Correct	12 ms	23764 KB	Output is correct
17	Correct	12 ms	23764 KB	Output is correct
18	Correct	12 ms	23780 KB	Output is correct
19	Correct	12 ms	23836 KB	Output is correct
20	Correct	12 ms	23832 KB	Output is correct
21	Correct	12 ms	23764 KB	Output is correct
22	Correct	12 ms	23764 KB	Output is correct
23	Correct	12 ms	23848 KB	Output is correct
24	Correct	13 ms	23852 KB	Output is correct
25	Correct	13 ms	23756 KB	Output is correct
26	Correct	14 ms	24168 KB	Output is correct
27	Correct	13 ms	24128 KB	Output is correct
28	Correct	14 ms	24276 KB	Output is correct
29	Correct	15 ms	24304 KB	Output is correct
30	Correct	13 ms	24020 KB	Output is correct
31	Correct	12 ms	23764 KB	Output is correct
32	Correct	13 ms	24208 KB	Output is correct
33	Correct	12 ms	23768 KB	Output is correct
34	Correct	15 ms	24020 KB	Output is correct
35	Correct	15 ms	24300 KB	Output is correct
36	Correct	14 ms	23900 KB	Output is correct
37	Correct	17 ms	24020 KB	Output is correct
38	Correct	13 ms	23764 KB	Output is correct
39	Correct	14 ms	24060 KB	Output is correct
40	Correct	14 ms	23936 KB	Output is correct
41	Correct	14 ms	24040 KB	Output is correct
42	Correct	14 ms	24020 KB	Output is correct
43	Correct	14 ms	24132 KB	Output is correct
44	Correct	15 ms	23764 KB	Output is correct
45	Correct	15 ms	24148 KB	Output is correct
46	Correct	14 ms	24004 KB	Output is correct
47	Correct	13 ms	23796 KB	Output is correct
48	Correct	15 ms	23948 KB	Output is correct
49	Correct	16 ms	24276 KB	Output is correct
50	Correct	15 ms	24276 KB	Output is correct
51	Correct	14 ms	24020 KB	Output is correct
52	Correct	13 ms	23932 KB	Output is correct
53	Correct	14 ms	24020 KB	Output is correct
54	Correct	13 ms	24028 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	23764 KB	Output is correct
2	Correct	12 ms	23756 KB	Output is correct
3	Correct	12 ms	23792 KB	Output is correct
4	Correct	14 ms	23832 KB	Output is correct
5	Correct	12 ms	23780 KB	Output is correct
6	Correct	12 ms	23860 KB	Output is correct
7	Correct	13 ms	23764 KB	Output is correct
8	Correct	13 ms	23852 KB	Output is correct
9	Correct	12 ms	23848 KB	Output is correct
10	Correct	12 ms	23824 KB	Output is correct
11	Correct	12 ms	23764 KB	Output is correct
12	Correct	12 ms	23764 KB	Output is correct
13	Correct	12 ms	23776 KB	Output is correct
14	Correct	14 ms	23764 KB	Output is correct
15	Correct	12 ms	23764 KB	Output is correct
16	Correct	12 ms	23764 KB	Output is correct
17	Correct	12 ms	23764 KB	Output is correct
18	Correct	12 ms	23780 KB	Output is correct
19	Correct	12 ms	23836 KB	Output is correct
20	Correct	12 ms	23832 KB	Output is correct
21	Correct	12 ms	23764 KB	Output is correct
22	Correct	12 ms	23764 KB	Output is correct
23	Correct	12 ms	23848 KB	Output is correct
24	Correct	13 ms	23852 KB	Output is correct
25	Correct	16 ms	23892 KB	Output is correct
26	Correct	51 ms	29512 KB	Output is correct
27	Correct	69 ms	29176 KB	Output is correct
28	Correct	14 ms	24020 KB	Output is correct
29	Correct	13 ms	23764 KB	Output is correct
30	Correct	13 ms	23764 KB	Output is correct
31	Correct	66 ms	29044 KB	Output is correct
32	Correct	15 ms	24020 KB	Output is correct
33	Correct	70 ms	33304 KB	Output is correct
34	Correct	69 ms	30660 KB	Output is correct
35	Correct	15 ms	24020 KB	Output is correct
36	Correct	69 ms	30952 KB	Output is correct
37	Correct	14 ms	24020 KB	Output is correct
38	Correct	15 ms	23992 KB	Output is correct
39	Correct	53 ms	30848 KB	Output is correct
40	Correct	14 ms	24096 KB	Output is correct
41	Correct	63 ms	30452 KB	Output is correct
42	Correct	75 ms	31908 KB	Output is correct
43	Correct	13 ms	23764 KB	Output is correct
44	Correct	69 ms	34880 KB	Output is correct
45	Correct	69 ms	32744 KB	Output is correct
46	Correct	13 ms	23964 KB	Output is correct
47	Correct	15 ms	23964 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	49 ms	29472 KB	Output is correct
2	Correct	138 ms	39048 KB	Output is correct
3	Correct	15 ms	24148 KB	Output is correct
4	Correct	14 ms	24020 KB	Output is correct
5	Correct	12 ms	23824 KB	Output is correct
6	Correct	14 ms	23820 KB	Output is correct
7	Correct	13 ms	23936 KB	Output is correct
8	Correct	84 ms	31180 KB	Output is correct
9	Correct	14 ms	24020 KB	Output is correct
10	Correct	61 ms	29132 KB	Output is correct
11	Correct	13 ms	23764 KB	Output is correct
12	Correct	61 ms	29128 KB	Output is correct
13	Correct	101 ms	31692 KB	Output is correct
14	Correct	162 ms	38744 KB	Output is correct
15	Correct	52 ms	29472 KB	Output is correct
16	Correct	14 ms	24020 KB	Output is correct
17	Correct	13 ms	23804 KB	Output is correct
18	Correct	118 ms	37396 KB	Output is correct
19	Correct	174 ms	41036 KB	Output is correct
20	Correct	14 ms	24072 KB	Output is correct
21	Correct	12 ms	23764 KB	Output is correct
22	Correct	74 ms	32024 KB	Output is correct
23	Correct	14 ms	24020 KB	Output is correct
24	Correct	84 ms	30100 KB	Output is correct
25	Correct	189 ms	40236 KB	Output is correct
26	Correct	16 ms	24276 KB	Output is correct
27	Correct	16 ms	24316 KB	Output is correct
28	Correct	14 ms	24020 KB	Output is correct
29	Correct	15 ms	24048 KB	Output is correct
30	Correct	14 ms	24020 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	23764 KB	Output is correct
2	Correct	12 ms	23756 KB	Output is correct
3	Correct	12 ms	23792 KB	Output is correct
4	Correct	14 ms	23832 KB	Output is correct
5	Correct	12 ms	23780 KB	Output is correct
6	Correct	12 ms	23860 KB	Output is correct
7	Correct	13 ms	23764 KB	Output is correct
8	Correct	13 ms	23852 KB	Output is correct
9	Correct	12 ms	23848 KB	Output is correct
10	Correct	12 ms	23824 KB	Output is correct
11	Correct	12 ms	23764 KB	Output is correct
12	Correct	12 ms	23764 KB	Output is correct
13	Correct	12 ms	23776 KB	Output is correct
14	Correct	14 ms	23764 KB	Output is correct
15	Correct	12 ms	23764 KB	Output is correct
16	Correct	12 ms	23764 KB	Output is correct
17	Correct	12 ms	23764 KB	Output is correct
18	Correct	12 ms	23780 KB	Output is correct
19	Correct	12 ms	23836 KB	Output is correct
20	Correct	12 ms	23832 KB	Output is correct
21	Correct	12 ms	23764 KB	Output is correct
22	Correct	12 ms	23764 KB	Output is correct
23	Correct	12 ms	23848 KB	Output is correct
24	Correct	13 ms	23852 KB	Output is correct
25	Correct	13 ms	23756 KB	Output is correct
26	Correct	14 ms	24168 KB	Output is correct
27	Correct	13 ms	24128 KB	Output is correct
28	Correct	14 ms	24276 KB	Output is correct
29	Correct	15 ms	24304 KB	Output is correct
30	Correct	13 ms	24020 KB	Output is correct
31	Correct	12 ms	23764 KB	Output is correct
32	Correct	13 ms	24208 KB	Output is correct
33	Correct	12 ms	23768 KB	Output is correct
34	Correct	15 ms	24020 KB	Output is correct
35	Correct	15 ms	24300 KB	Output is correct
36	Correct	14 ms	23900 KB	Output is correct
37	Correct	17 ms	24020 KB	Output is correct
38	Correct	13 ms	23764 KB	Output is correct
39	Correct	14 ms	24060 KB	Output is correct
40	Correct	14 ms	23936 KB	Output is correct
41	Correct	14 ms	24040 KB	Output is correct
42	Correct	14 ms	24020 KB	Output is correct
43	Correct	14 ms	24132 KB	Output is correct
44	Correct	15 ms	23764 KB	Output is correct
45	Correct	15 ms	24148 KB	Output is correct
46	Correct	14 ms	24004 KB	Output is correct
47	Correct	13 ms	23796 KB	Output is correct
48	Correct	15 ms	23948 KB	Output is correct
49	Correct	16 ms	24276 KB	Output is correct
50	Correct	15 ms	24276 KB	Output is correct
51	Correct	14 ms	24020 KB	Output is correct
52	Correct	13 ms	23932 KB	Output is correct
53	Correct	14 ms	24020 KB	Output is correct
54	Correct	13 ms	24028 KB	Output is correct
55	Correct	16 ms	23892 KB	Output is correct
56	Correct	51 ms	29512 KB	Output is correct
57	Correct	69 ms	29176 KB	Output is correct
58	Correct	14 ms	24020 KB	Output is correct
59	Correct	13 ms	23764 KB	Output is correct
60	Correct	13 ms	23764 KB	Output is correct
61	Correct	66 ms	29044 KB	Output is correct
62	Correct	15 ms	24020 KB	Output is correct
63	Correct	70 ms	33304 KB	Output is correct
64	Correct	69 ms	30660 KB	Output is correct
65	Correct	15 ms	24020 KB	Output is correct
66	Correct	69 ms	30952 KB	Output is correct
67	Correct	14 ms	24020 KB	Output is correct
68	Correct	15 ms	23992 KB	Output is correct
69	Correct	53 ms	30848 KB	Output is correct
70	Correct	14 ms	24096 KB	Output is correct
71	Correct	63 ms	30452 KB	Output is correct
72	Correct	75 ms	31908 KB	Output is correct
73	Correct	13 ms	23764 KB	Output is correct
74	Correct	69 ms	34880 KB	Output is correct
75	Correct	69 ms	32744 KB	Output is correct
76	Correct	13 ms	23964 KB	Output is correct
77	Correct	15 ms	23964 KB	Output is correct
78	Correct	49 ms	29472 KB	Output is correct
79	Correct	138 ms	39048 KB	Output is correct
80	Correct	15 ms	24148 KB	Output is correct
81	Correct	14 ms	24020 KB	Output is correct
82	Correct	12 ms	23824 KB	Output is correct
83	Correct	14 ms	23820 KB	Output is correct
84	Correct	13 ms	23936 KB	Output is correct
85	Correct	84 ms	31180 KB	Output is correct
86	Correct	14 ms	24020 KB	Output is correct
87	Correct	61 ms	29132 KB	Output is correct
88	Correct	13 ms	23764 KB	Output is correct
89	Correct	61 ms	29128 KB	Output is correct
90	Correct	101 ms	31692 KB	Output is correct
91	Correct	162 ms	38744 KB	Output is correct
92	Correct	52 ms	29472 KB	Output is correct
93	Correct	14 ms	24020 KB	Output is correct
94	Correct	13 ms	23804 KB	Output is correct
95	Correct	118 ms	37396 KB	Output is correct
96	Correct	174 ms	41036 KB	Output is correct
97	Correct	14 ms	24072 KB	Output is correct
98	Correct	12 ms	23764 KB	Output is correct
99	Correct	74 ms	32024 KB	Output is correct
100	Correct	14 ms	24020 KB	Output is correct
101	Correct	84 ms	30100 KB	Output is correct
102	Correct	189 ms	40236 KB	Output is correct
103	Correct	16 ms	24276 KB	Output is correct
104	Correct	16 ms	24316 KB	Output is correct
105	Correct	14 ms	24020 KB	Output is correct
106	Correct	15 ms	24048 KB	Output is correct
107	Correct	14 ms	24020 KB	Output is correct
108	Correct	527 ms	69892 KB	Output is correct
109	Correct	537 ms	68252 KB	Output is correct
110	Correct	522 ms	75004 KB	Output is correct
111	Correct	1375 ms	119944 KB	Output is correct
112	Correct	1118 ms	102004 KB	Output is correct
113	Correct	1065 ms	102192 KB	Output is correct
114	Correct	411 ms	57432 KB	Output is correct
115	Correct	413 ms	57712 KB	Output is correct
116	Correct	565 ms	62932 KB	Output is correct
117	Correct	1291 ms	108656 KB	Output is correct
118	Correct	445 ms	59008 KB	Output is correct
119	Correct	1295 ms	108788 KB	Output is correct
120	Correct	1401 ms	116944 KB	Output is correct
121	Correct	1448 ms	108624 KB	Output is correct
122	Correct	738 ms	75024 KB	Output is correct
123	Correct	1276 ms	110192 KB	Output is correct
124	Correct	1105 ms	95936 KB	Output is correct

답안 #743347

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