답안 #236812

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
236812	2020-06-03T12:42:31 Z	MvC	Mergers (JOI19_mergers)	C++11	100 / 100	1103 ms	127680 KB

mergers

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=5e5+50;
const ll mod=1e9+7;
using namespace std;
int x,y,i,n,up[nmax][20],tin[nmax],tout[nmax],tt,lc[nmax],sz[nmax],pr[nmax],deg[nmax],rs,j,lvl[nmax],c,k;
vector<int>a[nmax],vc[nmax];
void dfs(int x,int p)
{
    tin[x]=++tt;
    up[x][0]=p;
    lvl[x]=lvl[p]+1;
    for(int i=1;i<20;i++)up[x][i]=up[up[x][i-1]][i-1];
    for(int i=0;i<(int)a[x].size();i++)if(a[x][i]!=p)dfs(a[x][i],x);
    tout[x]=++tt;
}
int anc(int x,int y)
{
    return tin[x]<=tin[y] && tout[x]>=tout[y];
}
int lca(int x,int y)
{
    if(anc(x,y))return x;
    if(anc(y,x))return y;
    for(int i=19;i>=0;i--)if(!anc(up[x][i],y))x=up[x][i];
    return up[x][0];
}
int fnd(int x)
{
	if(pr[x]==x)return x;
	return pr[x]=fnd(pr[x]);
}
void uni(int x,int y)
{
	x=fnd(x),y=fnd(y);
	if(x==y)return;
	if(sz[x]<sz[y])swap(x,y);
	pr[y]=x;
	sz[x]+=sz[y];
}
void bld(int x,int p)
{
    for(int i=0;i<(int)a[x].size();i++)
    {
		int y=a[x][i];
		if(y==p)continue;
		bld(y,x);
	}
	lc[p]=max(lc[p],lc[x]-1);
	if(lc[x])uni(p,x);
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>k;
	for(i=1;i<n;i++)
	{
		cin>>x>>y;
		a[x].pb(y);
		a[y].pb(x);
	}
	dfs(1,1);
	for(i=1;i<=n;i++)
	{
		cin>>c;
		pr[i]=i;
		sz[i]=1;
		vc[c].pb(i);
	}
	for(i=1;i<=k;i++)
	{
		if(vc[i].empty())continue;
		x=vc[i][0];
		for(j=1;j<(int)vc[i].size();j++)x=lca(x,vc[i][j]);
		for(j=0;j<(int)vc[i].size();j++)lc[vc[i][j]]=lvl[vc[i][j]]-lvl[x];
	}
	bld(1,1);
	for(i=2;i<=n;i++)
	{
		if(lc[i])continue;
		deg[fnd(i)]++;
		deg[fnd(up[i][0])]++;
	}
	for(i=1;i<=n;i++)if(deg[i]==1)rs++;
	cout<<(rs+1)/2<<endl;
	return 0;
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	23936 KB	Output is correct
2	Correct	19 ms	23856 KB	Output is correct
3	Correct	19 ms	23928 KB	Output is correct
4	Correct	19 ms	23936 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	19 ms	23936 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	19 ms	23936 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	20 ms	23936 KB	Output is correct
11	Correct	19 ms	23936 KB	Output is correct
12	Correct	19 ms	23936 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	20 ms	23936 KB	Output is correct
15	Correct	19 ms	23936 KB	Output is correct
16	Correct	20 ms	23936 KB	Output is correct
17	Correct	19 ms	23936 KB	Output is correct
18	Correct	19 ms	23928 KB	Output is correct
19	Correct	20 ms	23936 KB	Output is correct
20	Correct	19 ms	23936 KB	Output is correct
21	Correct	20 ms	23936 KB	Output is correct
22	Correct	19 ms	23936 KB	Output is correct
23	Correct	19 ms	23936 KB	Output is correct
24	Correct	20 ms	23936 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	23936 KB	Output is correct
2	Correct	19 ms	23856 KB	Output is correct
3	Correct	19 ms	23928 KB	Output is correct
4	Correct	19 ms	23936 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	19 ms	23936 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	19 ms	23936 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	20 ms	23936 KB	Output is correct
11	Correct	19 ms	23936 KB	Output is correct
12	Correct	19 ms	23936 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	20 ms	23936 KB	Output is correct
15	Correct	19 ms	23936 KB	Output is correct
16	Correct	20 ms	23936 KB	Output is correct
17	Correct	19 ms	23936 KB	Output is correct
18	Correct	19 ms	23928 KB	Output is correct
19	Correct	20 ms	23936 KB	Output is correct
20	Correct	19 ms	23936 KB	Output is correct
21	Correct	20 ms	23936 KB	Output is correct
22	Correct	19 ms	23936 KB	Output is correct
23	Correct	19 ms	23936 KB	Output is correct
24	Correct	20 ms	23936 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	21 ms	24448 KB	Output is correct
27	Correct	22 ms	24320 KB	Output is correct
28	Correct	21 ms	24448 KB	Output is correct
29	Correct	21 ms	24448 KB	Output is correct
30	Correct	21 ms	24320 KB	Output is correct
31	Correct	20 ms	23936 KB	Output is correct
32	Correct	21 ms	24448 KB	Output is correct
33	Correct	21 ms	23936 KB	Output is correct
34	Correct	21 ms	24320 KB	Output is correct
35	Correct	22 ms	24448 KB	Output is correct
36	Correct	21 ms	24448 KB	Output is correct
37	Correct	21 ms	24320 KB	Output is correct
38	Correct	19 ms	23936 KB	Output is correct
39	Correct	22 ms	24320 KB	Output is correct
40	Correct	21 ms	24320 KB	Output is correct
41	Correct	21 ms	24320 KB	Output is correct
42	Correct	21 ms	24448 KB	Output is correct
43	Correct	21 ms	24448 KB	Output is correct
44	Correct	19 ms	23936 KB	Output is correct
45	Correct	21 ms	24448 KB	Output is correct
46	Correct	22 ms	24448 KB	Output is correct
47	Correct	19 ms	23936 KB	Output is correct
48	Correct	21 ms	24320 KB	Output is correct
49	Correct	21 ms	24448 KB	Output is correct
50	Correct	22 ms	24440 KB	Output is correct
51	Correct	21 ms	24320 KB	Output is correct
52	Correct	21 ms	24320 KB	Output is correct
53	Correct	21 ms	24448 KB	Output is correct
54	Correct	20 ms	24320 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	23936 KB	Output is correct
2	Correct	19 ms	23856 KB	Output is correct
3	Correct	19 ms	23928 KB	Output is correct
4	Correct	19 ms	23936 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	19 ms	23936 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	19 ms	23936 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	20 ms	23936 KB	Output is correct
11	Correct	19 ms	23936 KB	Output is correct
12	Correct	19 ms	23936 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	20 ms	23936 KB	Output is correct
15	Correct	19 ms	23936 KB	Output is correct
16	Correct	20 ms	23936 KB	Output is correct
17	Correct	19 ms	23936 KB	Output is correct
18	Correct	19 ms	23928 KB	Output is correct
19	Correct	20 ms	23936 KB	Output is correct
20	Correct	19 ms	23936 KB	Output is correct
21	Correct	20 ms	23936 KB	Output is correct
22	Correct	19 ms	23936 KB	Output is correct
23	Correct	19 ms	23936 KB	Output is correct
24	Correct	20 ms	23936 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	78 ms	39536 KB	Output is correct
27	Correct	104 ms	39160 KB	Output is correct
28	Correct	21 ms	24320 KB	Output is correct
29	Correct	20 ms	23936 KB	Output is correct
30	Correct	19 ms	23936 KB	Output is correct
31	Correct	118 ms	39288 KB	Output is correct
32	Correct	22 ms	24320 KB	Output is correct
33	Correct	147 ms	42232 KB	Output is correct
34	Correct	115 ms	39292 KB	Output is correct
35	Correct	21 ms	24320 KB	Output is correct
36	Correct	142 ms	39544 KB	Output is correct
37	Correct	21 ms	24320 KB	Output is correct
38	Correct	22 ms	24320 KB	Output is correct
39	Correct	85 ms	39536 KB	Output is correct
40	Correct	22 ms	24444 KB	Output is correct
41	Correct	107 ms	39280 KB	Output is correct
42	Correct	138 ms	40184 KB	Output is correct
43	Correct	20 ms	23936 KB	Output is correct
44	Correct	130 ms	42352 KB	Output is correct
45	Correct	149 ms	40824 KB	Output is correct
46	Correct	21 ms	24448 KB	Output is correct
47	Correct	21 ms	24320 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	90 ms	39664 KB	Output is correct
2	Correct	97 ms	42928 KB	Output is correct
3	Correct	22 ms	24448 KB	Output is correct
4	Correct	24 ms	24320 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	20 ms	23936 KB	Output is correct
7	Correct	20 ms	24320 KB	Output is correct
8	Correct	137 ms	40952 KB	Output is correct
9	Correct	21 ms	24320 KB	Output is correct
10	Correct	115 ms	39800 KB	Output is correct
11	Correct	20 ms	23808 KB	Output is correct
12	Correct	139 ms	39744 KB	Output is correct
13	Correct	141 ms	40952 KB	Output is correct
14	Correct	129 ms	42492 KB	Output is correct
15	Correct	81 ms	39620 KB	Output is correct
16	Correct	21 ms	24440 KB	Output is correct
17	Correct	19 ms	23936 KB	Output is correct
18	Correct	100 ms	42480 KB	Output is correct
19	Correct	160 ms	44152 KB	Output is correct
20	Correct	21 ms	24448 KB	Output is correct
21	Correct	20 ms	23808 KB	Output is correct
22	Correct	111 ms	41200 KB	Output is correct
23	Correct	22 ms	24320 KB	Output is correct
24	Correct	146 ms	40184 KB	Output is correct
25	Correct	156 ms	43640 KB	Output is correct
26	Correct	22 ms	24448 KB	Output is correct
27	Correct	22 ms	24448 KB	Output is correct
28	Correct	21 ms	24312 KB	Output is correct
29	Correct	21 ms	24320 KB	Output is correct
30	Correct	21 ms	24448 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	23936 KB	Output is correct
2	Correct	19 ms	23856 KB	Output is correct
3	Correct	19 ms	23928 KB	Output is correct
4	Correct	19 ms	23936 KB	Output is correct
5	Correct	19 ms	23936 KB	Output is correct
6	Correct	19 ms	23936 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	19 ms	23936 KB	Output is correct
9	Correct	19 ms	23936 KB	Output is correct
10	Correct	20 ms	23936 KB	Output is correct
11	Correct	19 ms	23936 KB	Output is correct
12	Correct	19 ms	23936 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	20 ms	23936 KB	Output is correct
15	Correct	19 ms	23936 KB	Output is correct
16	Correct	20 ms	23936 KB	Output is correct
17	Correct	19 ms	23936 KB	Output is correct
18	Correct	19 ms	23928 KB	Output is correct
19	Correct	20 ms	23936 KB	Output is correct
20	Correct	19 ms	23936 KB	Output is correct
21	Correct	20 ms	23936 KB	Output is correct
22	Correct	19 ms	23936 KB	Output is correct
23	Correct	19 ms	23936 KB	Output is correct
24	Correct	20 ms	23936 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	21 ms	24448 KB	Output is correct
27	Correct	22 ms	24320 KB	Output is correct
28	Correct	21 ms	24448 KB	Output is correct
29	Correct	21 ms	24448 KB	Output is correct
30	Correct	21 ms	24320 KB	Output is correct
31	Correct	20 ms	23936 KB	Output is correct
32	Correct	21 ms	24448 KB	Output is correct
33	Correct	21 ms	23936 KB	Output is correct
34	Correct	21 ms	24320 KB	Output is correct
35	Correct	22 ms	24448 KB	Output is correct
36	Correct	21 ms	24448 KB	Output is correct
37	Correct	21 ms	24320 KB	Output is correct
38	Correct	19 ms	23936 KB	Output is correct
39	Correct	22 ms	24320 KB	Output is correct
40	Correct	21 ms	24320 KB	Output is correct
41	Correct	21 ms	24320 KB	Output is correct
42	Correct	21 ms	24448 KB	Output is correct
43	Correct	21 ms	24448 KB	Output is correct
44	Correct	19 ms	23936 KB	Output is correct
45	Correct	21 ms	24448 KB	Output is correct
46	Correct	22 ms	24448 KB	Output is correct
47	Correct	19 ms	23936 KB	Output is correct
48	Correct	21 ms	24320 KB	Output is correct
49	Correct	21 ms	24448 KB	Output is correct
50	Correct	22 ms	24440 KB	Output is correct
51	Correct	21 ms	24320 KB	Output is correct
52	Correct	21 ms	24320 KB	Output is correct
53	Correct	21 ms	24448 KB	Output is correct
54	Correct	20 ms	24320 KB	Output is correct
55	Correct	19 ms	23936 KB	Output is correct
56	Correct	78 ms	39536 KB	Output is correct
57	Correct	104 ms	39160 KB	Output is correct
58	Correct	21 ms	24320 KB	Output is correct
59	Correct	20 ms	23936 KB	Output is correct
60	Correct	19 ms	23936 KB	Output is correct
61	Correct	118 ms	39288 KB	Output is correct
62	Correct	22 ms	24320 KB	Output is correct
63	Correct	147 ms	42232 KB	Output is correct
64	Correct	115 ms	39292 KB	Output is correct
65	Correct	21 ms	24320 KB	Output is correct
66	Correct	142 ms	39544 KB	Output is correct
67	Correct	21 ms	24320 KB	Output is correct
68	Correct	22 ms	24320 KB	Output is correct
69	Correct	85 ms	39536 KB	Output is correct
70	Correct	22 ms	24444 KB	Output is correct
71	Correct	107 ms	39280 KB	Output is correct
72	Correct	138 ms	40184 KB	Output is correct
73	Correct	20 ms	23936 KB	Output is correct
74	Correct	130 ms	42352 KB	Output is correct
75	Correct	149 ms	40824 KB	Output is correct
76	Correct	21 ms	24448 KB	Output is correct
77	Correct	21 ms	24320 KB	Output is correct
78	Correct	90 ms	39664 KB	Output is correct
79	Correct	97 ms	42928 KB	Output is correct
80	Correct	22 ms	24448 KB	Output is correct
81	Correct	24 ms	24320 KB	Output is correct
82	Correct	19 ms	23936 KB	Output is correct
83	Correct	20 ms	23936 KB	Output is correct
84	Correct	20 ms	24320 KB	Output is correct
85	Correct	137 ms	40952 KB	Output is correct
86	Correct	21 ms	24320 KB	Output is correct
87	Correct	115 ms	39800 KB	Output is correct
88	Correct	20 ms	23808 KB	Output is correct
89	Correct	139 ms	39744 KB	Output is correct
90	Correct	141 ms	40952 KB	Output is correct
91	Correct	129 ms	42492 KB	Output is correct
92	Correct	81 ms	39620 KB	Output is correct
93	Correct	21 ms	24440 KB	Output is correct
94	Correct	19 ms	23936 KB	Output is correct
95	Correct	100 ms	42480 KB	Output is correct
96	Correct	160 ms	44152 KB	Output is correct
97	Correct	21 ms	24448 KB	Output is correct
98	Correct	20 ms	23808 KB	Output is correct
99	Correct	111 ms	41200 KB	Output is correct
100	Correct	22 ms	24320 KB	Output is correct
101	Correct	146 ms	40184 KB	Output is correct
102	Correct	156 ms	43640 KB	Output is correct
103	Correct	22 ms	24448 KB	Output is correct
104	Correct	22 ms	24448 KB	Output is correct
105	Correct	21 ms	24312 KB	Output is correct
106	Correct	21 ms	24320 KB	Output is correct
107	Correct	21 ms	24448 KB	Output is correct
108	Correct	646 ms	110644 KB	Output is correct
109	Correct	885 ms	108508 KB	Output is correct
110	Correct	896 ms	113252 KB	Output is correct
111	Correct	1091 ms	127680 KB	Output is correct
112	Correct	1103 ms	123256 KB	Output is correct
113	Correct	640 ms	117464 KB	Output is correct
114	Correct	694 ms	100692 KB	Output is correct
115	Correct	709 ms	100712 KB	Output is correct
116	Correct	899 ms	107000 KB	Output is correct
117	Correct	904 ms	117352 KB	Output is correct
118	Correct	724 ms	102560 KB	Output is correct
119	Correct	891 ms	117316 KB	Output is correct
120	Correct	1101 ms	122740 KB	Output is correct
121	Correct	955 ms	117112 KB	Output is correct
122	Correct	940 ms	111096 KB	Output is correct
123	Correct	628 ms	118244 KB	Output is correct
124	Correct	1000 ms	115452 KB	Output is correct

답안 #236812

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