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답안 #1048892

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1048892 2024-08-08T10:27:41 Z 1L1YA Mergers (JOI19_mergers) C++17
70 / 100
 762 ms 262144 KB 
//1L1YA

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

//#pragma GCC optimize ("O3,unrool-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

typedef long long       ll;
typedef pair<ll,ll>     pll;
typedef pair<int,int>   pii;

#define Pb              push_back
#define F               first
#define S               second
#define endl            '\n'
#define sep             ' '
#define all(x)          x.begin(),x.end()
#define al(x,n)         x+1,x+n+1
#define SZ(x)           ((int)x.size())
#define lc              (id<<1)
#define rc              (lc|1)
#define mid             (l+r>>1)
#define dokme(x)        cout << x << endl, exit(0)
#define sik(x)          cout << x << endl;continue;
#define FastIO          ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define FileIO          freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll oo=1e18;
const int mod=1e9+7;
const int inf=1e9+111;
const int N=5e5+11;
const int lg=23;

int n,k,ans,a[N],h[N],pr[N],cnt[N],par[lg][N];
vector<int> vc[N],adj[N];
set<int> st[N];
vector<pii> E;
bool mark[N];

void dfs(int v,int p=0){
	for(int u: adj[v])
		if(u!=p){
			h[u]=h[v]+1;
			par[0][u]=v;
			dfs(u,v);
		}
}

int jump(int v,int k){
	for(int i=0;i<lg;i++)
		if(k>>i & 1)
			v=par[i][v];
	return v;
}

int lca(int u,int v){
	if(h[u]>h[v])	swap(u,v);
	v=jump(v,h[v]-h[u]);
	if(u==v)	return v;
	for(int i=lg-1;~i;i--)
		if(par[i][u]!=par[i][v])
			u=par[i][u],v=par[i][v];
	return par[0][v];
}

void DFS(int v,int p=0){
	st[v].insert(a[v]);
	for(int u: adj[v])
		if(u!=p){
			DFS(u,v);
			cnt[v]+=cnt[u];
			if(SZ(st[v])<SZ(st[u]))	st[v].swap(st[u]);
			for(int x: st[u])	st[v].insert(x);
		}
	if(cnt[v]==SZ(st[v]))	mark[v]=1;
}

void dFs(int v,int p=0){
	for(int u: adj[v])
		if(u!=p){
			if(!mark[u])	pr[u]=pr[v];
			dFs(u,v);
		}
}

int main(){
	FastIO

	cin >> n >> k;
	for(int i=1;i<n;i++){
		int u,v;
		cin >> u >> v;
		adj[u].Pb(v);
		adj[v].Pb(u);
		E.Pb({u,v});
	}
	for(int i=1;i<=n;i++)	cin >> a[i],vc[a[i]].Pb(i);
	dfs(1);
	for(int i=1;i<lg;i++)
		for(int v=1;v<=n;v++)
			par[i][v]=par[i-1][par[i-1][v]];
	for(int i=1;i<=k;i++){
		int v=vc[i][0];
		for(int u: vc[i])	v=lca(u,v);
		cnt[v]++;
	}
	DFS(1);
	for(int i=1;i<=n;i++)	pr[i]=i;
	dFs(1);
	fill(cnt,cnt+n+1,0);
	for(auto [u,v]: E)
		if(pr[u]!=pr[v]){
			cnt[pr[u]]++;
			cnt[pr[v]]++;
			if(cnt[pr[u]]==1)	ans++;
			else if(cnt[pr[u]]==2)	ans--;
			if(cnt[pr[v]]==1)	ans++;
			else if(cnt[pr[v]]==2)	ans--;	
		}
	cout << (ans+1)/2 << endl;

	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 96856 KB Output is correct
2 Correct 10 ms 96860 KB Output is correct
3 Correct 10 ms 96860 KB Output is correct
4 Correct 10 ms 96860 KB Output is correct
5 Correct 10 ms 96920 KB Output is correct
6 Correct 10 ms 96848 KB Output is correct
7 Correct 11 ms 97112 KB Output is correct
8 Correct 10 ms 96860 KB Output is correct
9 Correct 10 ms 96860 KB Output is correct
10 Correct 10 ms 96860 KB Output is correct
11 Correct 10 ms 96704 KB Output is correct
12 Correct 10 ms 96928 KB Output is correct
13 Correct 10 ms 96860 KB Output is correct
14 Correct 10 ms 96700 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 10 ms 96712 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 10 ms 96860 KB Output is correct
19 Correct 10 ms 96752 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96732 KB Output is correct
22 Correct 10 ms 96860 KB Output is correct
23 Correct 10 ms 96860 KB Output is correct
24 Correct 10 ms 96860 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 96856 KB Output is correct
2 Correct 10 ms 96860 KB Output is correct
3 Correct 10 ms 96860 KB Output is correct
4 Correct 10 ms 96860 KB Output is correct
5 Correct 10 ms 96920 KB Output is correct
6 Correct 10 ms 96848 KB Output is correct
7 Correct 11 ms 97112 KB Output is correct
8 Correct 10 ms 96860 KB Output is correct
9 Correct 10 ms 96860 KB Output is correct
10 Correct 10 ms 96860 KB Output is correct
11 Correct 10 ms 96704 KB Output is correct
12 Correct 10 ms 96928 KB Output is correct
13 Correct 10 ms 96860 KB Output is correct
14 Correct 10 ms 96700 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 10 ms 96712 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 10 ms 96860 KB Output is correct
19 Correct 10 ms 96752 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96732 KB Output is correct
22 Correct 10 ms 96860 KB Output is correct
23 Correct 10 ms 96860 KB Output is correct
24 Correct 10 ms 96860 KB Output is correct
25 Correct 12 ms 96860 KB Output is correct
26 Correct 12 ms 97372 KB Output is correct
27 Correct 12 ms 97248 KB Output is correct
28 Correct 12 ms 97628 KB Output is correct
29 Correct 13 ms 97624 KB Output is correct
30 Correct 12 ms 97464 KB Output is correct
31 Correct 10 ms 96860 KB Output is correct
32 Correct 12 ms 97708 KB Output is correct
33 Correct 10 ms 96924 KB Output is correct
34 Correct 11 ms 97112 KB Output is correct
35 Correct 12 ms 97788 KB Output is correct
36 Correct 11 ms 96988 KB Output is correct
37 Correct 12 ms 97372 KB Output is correct
38 Correct 10 ms 96860 KB Output is correct
39 Correct 14 ms 97624 KB Output is correct
40 Correct 12 ms 97116 KB Output is correct
41 Correct 11 ms 97116 KB Output is correct
42 Correct 12 ms 97372 KB Output is correct
43 Correct 12 ms 97368 KB Output is correct
44 Correct 10 ms 96860 KB Output is correct
45 Correct 12 ms 97620 KB Output is correct
46 Correct 12 ms 97484 KB Output is correct
47 Correct 10 ms 96860 KB Output is correct
48 Correct 11 ms 97292 KB Output is correct
49 Correct 11 ms 97372 KB Output is correct
50 Correct 12 ms 97548 KB Output is correct
51 Correct 12 ms 97320 KB Output is correct
52 Correct 11 ms 97368 KB Output is correct
53 Correct 12 ms 97116 KB Output is correct
54 Correct 11 ms 97372 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 96856 KB Output is correct
2 Correct 10 ms 96860 KB Output is correct
3 Correct 10 ms 96860 KB Output is correct
4 Correct 10 ms 96860 KB Output is correct
5 Correct 10 ms 96920 KB Output is correct
6 Correct 10 ms 96848 KB Output is correct
7 Correct 11 ms 97112 KB Output is correct
8 Correct 10 ms 96860 KB Output is correct
9 Correct 10 ms 96860 KB Output is correct
10 Correct 10 ms 96860 KB Output is correct
11 Correct 10 ms 96704 KB Output is correct
12 Correct 10 ms 96928 KB Output is correct
13 Correct 10 ms 96860 KB Output is correct
14 Correct 10 ms 96700 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 10 ms 96712 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 10 ms 96860 KB Output is correct
19 Correct 10 ms 96752 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96732 KB Output is correct
22 Correct 10 ms 96860 KB Output is correct
23 Correct 10 ms 96860 KB Output is correct
24 Correct 10 ms 96860 KB Output is correct
25 Correct 10 ms 96860 KB Output is correct
26 Correct 55 ms 106764 KB Output is correct
27 Correct 85 ms 113092 KB Output is correct
28 Correct 12 ms 97112 KB Output is correct
29 Correct 10 ms 96860 KB Output is correct
30 Correct 10 ms 96864 KB Output is correct
31 Correct 59 ms 106696 KB Output is correct
32 Correct 11 ms 97116 KB Output is correct
33 Correct 75 ms 115148 KB Output is correct
34 Correct 81 ms 111808 KB Output is correct
35 Correct 12 ms 97112 KB Output is correct
36 Correct 63 ms 107736 KB Output is correct
37 Correct 12 ms 97112 KB Output is correct
38 Correct 11 ms 97032 KB Output is correct
39 Correct 53 ms 106780 KB Output is correct
40 Correct 12 ms 97372 KB Output is correct
41 Correct 57 ms 104904 KB Output is correct
42 Correct 71 ms 109764 KB Output is correct
43 Correct 11 ms 96856 KB Output is correct
44 Correct 87 ms 115264 KB Output is correct
45 Correct 79 ms 111300 KB Output is correct
46 Correct 11 ms 97116 KB Output is correct
47 Correct 12 ms 97272 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 106728 KB Output is correct
2 Correct 84 ms 114364 KB Output is correct
3 Correct 12 ms 97368 KB Output is correct
4 Correct 11 ms 97116 KB Output is correct
5 Correct 10 ms 96892 KB Output is correct
6 Correct 10 ms 96860 KB Output is correct
7 Correct 11 ms 97024 KB Output is correct
8 Correct 104 ms 120556 KB Output is correct
9 Correct 12 ms 97112 KB Output is correct
10 Correct 61 ms 106840 KB Output is correct
11 Correct 10 ms 96856 KB Output is correct
12 Correct 73 ms 106776 KB Output is correct
13 Correct 101 ms 119492 KB Output is correct
14 Correct 131 ms 133736 KB Output is correct
15 Correct 50 ms 106816 KB Output is correct
16 Correct 12 ms 97372 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 92 ms 114464 KB Output is correct
19 Correct 105 ms 121940 KB Output is correct
20 Correct 12 ms 97368 KB Output is correct
21 Correct 10 ms 96848 KB Output is correct
22 Correct 78 ms 110272 KB Output is correct
23 Correct 12 ms 97112 KB Output is correct
24 Correct 71 ms 108996 KB Output is correct
25 Correct 99 ms 120216 KB Output is correct
26 Correct 11 ms 97372 KB Output is correct
27 Correct 12 ms 97612 KB Output is correct
28 Correct 11 ms 97320 KB Output is correct
29 Correct 11 ms 97116 KB Output is correct
30 Correct 12 ms 97284 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 96856 KB Output is correct
2 Correct 10 ms 96860 KB Output is correct
3 Correct 10 ms 96860 KB Output is correct
4 Correct 10 ms 96860 KB Output is correct
5 Correct 10 ms 96920 KB Output is correct
6 Correct 10 ms 96848 KB Output is correct
7 Correct 11 ms 97112 KB Output is correct
8 Correct 10 ms 96860 KB Output is correct
9 Correct 10 ms 96860 KB Output is correct
10 Correct 10 ms 96860 KB Output is correct
11 Correct 10 ms 96704 KB Output is correct
12 Correct 10 ms 96928 KB Output is correct
13 Correct 10 ms 96860 KB Output is correct
14 Correct 10 ms 96700 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 10 ms 96712 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 10 ms 96860 KB Output is correct
19 Correct 10 ms 96752 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96732 KB Output is correct
22 Correct 10 ms 96860 KB Output is correct
23 Correct 10 ms 96860 KB Output is correct
24 Correct 10 ms 96860 KB Output is correct
25 Correct 12 ms 96860 KB Output is correct
26 Correct 12 ms 97372 KB Output is correct
27 Correct 12 ms 97248 KB Output is correct
28 Correct 12 ms 97628 KB Output is correct
29 Correct 13 ms 97624 KB Output is correct
30 Correct 12 ms 97464 KB Output is correct
31 Correct 10 ms 96860 KB Output is correct
32 Correct 12 ms 97708 KB Output is correct
33 Correct 10 ms 96924 KB Output is correct
34 Correct 11 ms 97112 KB Output is correct
35 Correct 12 ms 97788 KB Output is correct
36 Correct 11 ms 96988 KB Output is correct
37 Correct 12 ms 97372 KB Output is correct
38 Correct 10 ms 96860 KB Output is correct
39 Correct 14 ms 97624 KB Output is correct
40 Correct 12 ms 97116 KB Output is correct
41 Correct 11 ms 97116 KB Output is correct
42 Correct 12 ms 97372 KB Output is correct
43 Correct 12 ms 97368 KB Output is correct
44 Correct 10 ms 96860 KB Output is correct
45 Correct 12 ms 97620 KB Output is correct
46 Correct 12 ms 97484 KB Output is correct
47 Correct 10 ms 96860 KB Output is correct
48 Correct 11 ms 97292 KB Output is correct
49 Correct 11 ms 97372 KB Output is correct
50 Correct 12 ms 97548 KB Output is correct
51 Correct 12 ms 97320 KB Output is correct
52 Correct 11 ms 97368 KB Output is correct
53 Correct 12 ms 97116 KB Output is correct
54 Correct 11 ms 97372 KB Output is correct
55 Correct 10 ms 96860 KB Output is correct
56 Correct 55 ms 106764 KB Output is correct
57 Correct 85 ms 113092 KB Output is correct
58 Correct 12 ms 97112 KB Output is correct
59 Correct 10 ms 96860 KB Output is correct
60 Correct 10 ms 96864 KB Output is correct
61 Correct 59 ms 106696 KB Output is correct
62 Correct 11 ms 97116 KB Output is correct
63 Correct 75 ms 115148 KB Output is correct
64 Correct 81 ms 111808 KB Output is correct
65 Correct 12 ms 97112 KB Output is correct
66 Correct 63 ms 107736 KB Output is correct
67 Correct 12 ms 97112 KB Output is correct
68 Correct 11 ms 97032 KB Output is correct
69 Correct 53 ms 106780 KB Output is correct
70 Correct 12 ms 97372 KB Output is correct
71 Correct 57 ms 104904 KB Output is correct
72 Correct 71 ms 109764 KB Output is correct
73 Correct 11 ms 96856 KB Output is correct
74 Correct 87 ms 115264 KB Output is correct
75 Correct 79 ms 111300 KB Output is correct
76 Correct 11 ms 97116 KB Output is correct
77 Correct 12 ms 97272 KB Output is correct
78 Correct 52 ms 106728 KB Output is correct
79 Correct 84 ms 114364 KB Output is correct
80 Correct 12 ms 97368 KB Output is correct
81 Correct 11 ms 97116 KB Output is correct
82 Correct 10 ms 96892 KB Output is correct
83 Correct 10 ms 96860 KB Output is correct
84 Correct 11 ms 97024 KB Output is correct
85 Correct 104 ms 120556 KB Output is correct
86 Correct 12 ms 97112 KB Output is correct
87 Correct 61 ms 106840 KB Output is correct
88 Correct 10 ms 96856 KB Output is correct
89 Correct 73 ms 106776 KB Output is correct
90 Correct 101 ms 119492 KB Output is correct
91 Correct 131 ms 133736 KB Output is correct
92 Correct 50 ms 106816 KB Output is correct
93 Correct 12 ms 97372 KB Output is correct
94 Correct 10 ms 96860 KB Output is correct
95 Correct 92 ms 114464 KB Output is correct
96 Correct 105 ms 121940 KB Output is correct
97 Correct 12 ms 97368 KB Output is correct
98 Correct 10 ms 96848 KB Output is correct
99 Correct 78 ms 110272 KB Output is correct
100 Correct 12 ms 97112 KB Output is correct
101 Correct 71 ms 108996 KB Output is correct
102 Correct 99 ms 120216 KB Output is correct
103 Correct 11 ms 97372 KB Output is correct
104 Correct 12 ms 97612 KB Output is correct
105 Correct 11 ms 97320 KB Output is correct
106 Correct 11 ms 97116 KB Output is correct
107 Correct 12 ms 97284 KB Output is correct
108 Correct 514 ms 161444 KB Output is correct
109 Correct 582 ms 171444 KB Output is correct
110 Correct 581 ms 187120 KB Output is correct
111 Correct 762 ms 225208 KB Output is correct
112 Correct 733 ms 215180 KB Output is correct
113 Correct 652 ms 181436 KB Output is correct
114 Correct 370 ms 145952 KB Output is correct
115 Correct 373 ms 146104 KB Output is correct
116 Correct 648 ms 220272 KB Output is correct
117 Runtime error 523 ms 262144 KB Execution killed with signal 9
118 Halted 0 ms 0 KB -