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답안 #1048890

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1048890 2024-08-08T10:26:06 Z 1L1YA Mergers (JOI19_mergers) C++17
70 / 100
 764 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 11 ms 96860 KB Output is correct
2 Correct 10 ms 96852 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 96860 KB Output is correct
6 Correct 10 ms 96860 KB Output is correct
7 Correct 10 ms 96748 KB Output is correct
8 Correct 11 ms 96860 KB Output is correct
9 Correct 11 ms 96860 KB Output is correct
10 Correct 10 ms 96856 KB Output is correct
11 Correct 10 ms 96860 KB Output is correct
12 Correct 10 ms 96932 KB Output is correct
13 Correct 11 ms 96820 KB Output is correct
14 Correct 11 ms 96696 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 11 ms 96744 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 11 ms 96748 KB Output is correct
19 Correct 10 ms 96820 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96860 KB Output is correct
22 Correct 10 ms 96940 KB Output is correct
23 Correct 11 ms 96860 KB Output is correct
24 Correct 10 ms 96916 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 96860 KB Output is correct
2 Correct 10 ms 96852 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 96860 KB Output is correct
6 Correct 10 ms 96860 KB Output is correct
7 Correct 10 ms 96748 KB Output is correct
8 Correct 11 ms 96860 KB Output is correct
9 Correct 11 ms 96860 KB Output is correct
10 Correct 10 ms 96856 KB Output is correct
11 Correct 10 ms 96860 KB Output is correct
12 Correct 10 ms 96932 KB Output is correct
13 Correct 11 ms 96820 KB Output is correct
14 Correct 11 ms 96696 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 11 ms 96744 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 11 ms 96748 KB Output is correct
19 Correct 10 ms 96820 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96860 KB Output is correct
22 Correct 10 ms 96940 KB Output is correct
23 Correct 11 ms 96860 KB Output is correct
24 Correct 10 ms 96916 KB Output is correct
25 Correct 12 ms 96860 KB Output is correct
26 Correct 12 ms 97536 KB Output is correct
27 Correct 13 ms 97116 KB Output is correct
28 Correct 12 ms 97624 KB Output is correct
29 Correct 14 ms 97676 KB Output is correct
30 Correct 14 ms 97372 KB Output is correct
31 Correct 10 ms 96932 KB Output is correct
32 Correct 14 ms 97628 KB Output is correct
33 Correct 10 ms 96860 KB Output is correct
34 Correct 12 ms 97268 KB Output is correct
35 Correct 13 ms 97628 KB Output is correct
36 Correct 11 ms 97116 KB Output is correct
37 Correct 12 ms 97372 KB Output is correct
38 Correct 10 ms 96940 KB Output is correct
39 Correct 13 ms 97604 KB Output is correct
40 Correct 11 ms 97112 KB Output is correct
41 Correct 11 ms 97044 KB Output is correct
42 Correct 11 ms 97368 KB Output is correct
43 Correct 11 ms 97512 KB Output is correct
44 Correct 10 ms 96944 KB Output is correct
45 Correct 14 ms 97500 KB Output is correct
46 Correct 12 ms 97560 KB Output is correct
47 Correct 10 ms 96820 KB Output is correct
48 Correct 12 ms 97372 KB Output is correct
49 Correct 12 ms 97436 KB Output is correct
50 Correct 12 ms 97476 KB Output is correct
51 Correct 12 ms 97368 KB Output is correct
52 Correct 12 ms 97112 KB Output is correct
53 Correct 13 ms 97292 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 11 ms 96860 KB Output is correct
2 Correct 10 ms 96852 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 96860 KB Output is correct
6 Correct 10 ms 96860 KB Output is correct
7 Correct 10 ms 96748 KB Output is correct
8 Correct 11 ms 96860 KB Output is correct
9 Correct 11 ms 96860 KB Output is correct
10 Correct 10 ms 96856 KB Output is correct
11 Correct 10 ms 96860 KB Output is correct
12 Correct 10 ms 96932 KB Output is correct
13 Correct 11 ms 96820 KB Output is correct
14 Correct 11 ms 96696 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 11 ms 96744 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 11 ms 96748 KB Output is correct
19 Correct 10 ms 96820 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96860 KB Output is correct
22 Correct 10 ms 96940 KB Output is correct
23 Correct 11 ms 96860 KB Output is correct
24 Correct 10 ms 96916 KB Output is correct
25 Correct 10 ms 96860 KB Output is correct
26 Correct 52 ms 108188 KB Output is correct
27 Correct 84 ms 114588 KB Output is correct
28 Correct 12 ms 97276 KB Output is correct
29 Correct 10 ms 96756 KB Output is correct
30 Correct 10 ms 96860 KB Output is correct
31 Correct 65 ms 107976 KB Output is correct
32 Correct 11 ms 97080 KB Output is correct
33 Correct 77 ms 116424 KB Output is correct
34 Correct 76 ms 113344 KB Output is correct
35 Correct 13 ms 97116 KB Output is correct
36 Correct 65 ms 109036 KB Output is correct
37 Correct 11 ms 97116 KB Output is correct
38 Correct 12 ms 97116 KB Output is correct
39 Correct 51 ms 108088 KB Output is correct
40 Correct 11 ms 97372 KB Output is correct
41 Correct 59 ms 106176 KB Output is correct
42 Correct 73 ms 111304 KB Output is correct
43 Correct 10 ms 96940 KB Output is correct
44 Correct 76 ms 116820 KB Output is correct
45 Correct 72 ms 112836 KB Output is correct
46 Correct 11 ms 97116 KB Output is correct
47 Correct 12 ms 97236 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 51 ms 108192 KB Output is correct
2 Correct 87 ms 115900 KB Output is correct
3 Correct 12 ms 97372 KB Output is correct
4 Correct 11 ms 97088 KB Output is correct
5 Correct 10 ms 96860 KB Output is correct
6 Correct 10 ms 96884 KB Output is correct
7 Correct 11 ms 97108 KB Output is correct
8 Correct 105 ms 122312 KB Output is correct
9 Correct 12 ms 97116 KB Output is correct
10 Correct 63 ms 108292 KB Output is correct
11 Correct 13 ms 96860 KB Output is correct
12 Correct 66 ms 108404 KB Output is correct
13 Correct 102 ms 121276 KB Output is correct
14 Correct 126 ms 135368 KB Output is correct
15 Correct 51 ms 108268 KB Output is correct
16 Correct 12 ms 97368 KB Output is correct
17 Correct 10 ms 96892 KB Output is correct
18 Correct 94 ms 116224 KB Output is correct
19 Correct 114 ms 123504 KB Output is correct
20 Correct 12 ms 97372 KB Output is correct
21 Correct 10 ms 96796 KB Output is correct
22 Correct 74 ms 112092 KB Output is correct
23 Correct 12 ms 97372 KB Output is correct
24 Correct 74 ms 110536 KB Output is correct
25 Correct 114 ms 121968 KB Output is correct
26 Correct 12 ms 97372 KB Output is correct
27 Correct 12 ms 97624 KB Output is correct
28 Correct 12 ms 97372 KB Output is correct
29 Correct 12 ms 97116 KB Output is correct
30 Correct 11 ms 97264 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 96860 KB Output is correct
2 Correct 10 ms 96852 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 96860 KB Output is correct
6 Correct 10 ms 96860 KB Output is correct
7 Correct 10 ms 96748 KB Output is correct
8 Correct 11 ms 96860 KB Output is correct
9 Correct 11 ms 96860 KB Output is correct
10 Correct 10 ms 96856 KB Output is correct
11 Correct 10 ms 96860 KB Output is correct
12 Correct 10 ms 96932 KB Output is correct
13 Correct 11 ms 96820 KB Output is correct
14 Correct 11 ms 96696 KB Output is correct
15 Correct 10 ms 96860 KB Output is correct
16 Correct 11 ms 96744 KB Output is correct
17 Correct 10 ms 96860 KB Output is correct
18 Correct 11 ms 96748 KB Output is correct
19 Correct 10 ms 96820 KB Output is correct
20 Correct 10 ms 96860 KB Output is correct
21 Correct 10 ms 96860 KB Output is correct
22 Correct 10 ms 96940 KB Output is correct
23 Correct 11 ms 96860 KB Output is correct
24 Correct 10 ms 96916 KB Output is correct
25 Correct 12 ms 96860 KB Output is correct
26 Correct 12 ms 97536 KB Output is correct
27 Correct 13 ms 97116 KB Output is correct
28 Correct 12 ms 97624 KB Output is correct
29 Correct 14 ms 97676 KB Output is correct
30 Correct 14 ms 97372 KB Output is correct
31 Correct 10 ms 96932 KB Output is correct
32 Correct 14 ms 97628 KB Output is correct
33 Correct 10 ms 96860 KB Output is correct
34 Correct 12 ms 97268 KB Output is correct
35 Correct 13 ms 97628 KB Output is correct
36 Correct 11 ms 97116 KB Output is correct
37 Correct 12 ms 97372 KB Output is correct
38 Correct 10 ms 96940 KB Output is correct
39 Correct 13 ms 97604 KB Output is correct
40 Correct 11 ms 97112 KB Output is correct
41 Correct 11 ms 97044 KB Output is correct
42 Correct 11 ms 97368 KB Output is correct
43 Correct 11 ms 97512 KB Output is correct
44 Correct 10 ms 96944 KB Output is correct
45 Correct 14 ms 97500 KB Output is correct
46 Correct 12 ms 97560 KB Output is correct
47 Correct 10 ms 96820 KB Output is correct
48 Correct 12 ms 97372 KB Output is correct
49 Correct 12 ms 97436 KB Output is correct
50 Correct 12 ms 97476 KB Output is correct
51 Correct 12 ms 97368 KB Output is correct
52 Correct 12 ms 97112 KB Output is correct
53 Correct 13 ms 97292 KB Output is correct
54 Correct 11 ms 97372 KB Output is correct
55 Correct 10 ms 96860 KB Output is correct
56 Correct 52 ms 108188 KB Output is correct
57 Correct 84 ms 114588 KB Output is correct
58 Correct 12 ms 97276 KB Output is correct
59 Correct 10 ms 96756 KB Output is correct
60 Correct 10 ms 96860 KB Output is correct
61 Correct 65 ms 107976 KB Output is correct
62 Correct 11 ms 97080 KB Output is correct
63 Correct 77 ms 116424 KB Output is correct
64 Correct 76 ms 113344 KB Output is correct
65 Correct 13 ms 97116 KB Output is correct
66 Correct 65 ms 109036 KB Output is correct
67 Correct 11 ms 97116 KB Output is correct
68 Correct 12 ms 97116 KB Output is correct
69 Correct 51 ms 108088 KB Output is correct
70 Correct 11 ms 97372 KB Output is correct
71 Correct 59 ms 106176 KB Output is correct
72 Correct 73 ms 111304 KB Output is correct
73 Correct 10 ms 96940 KB Output is correct
74 Correct 76 ms 116820 KB Output is correct
75 Correct 72 ms 112836 KB Output is correct
76 Correct 11 ms 97116 KB Output is correct
77 Correct 12 ms 97236 KB Output is correct
78 Correct 51 ms 108192 KB Output is correct
79 Correct 87 ms 115900 KB Output is correct
80 Correct 12 ms 97372 KB Output is correct
81 Correct 11 ms 97088 KB Output is correct
82 Correct 10 ms 96860 KB Output is correct
83 Correct 10 ms 96884 KB Output is correct
84 Correct 11 ms 97108 KB Output is correct
85 Correct 105 ms 122312 KB Output is correct
86 Correct 12 ms 97116 KB Output is correct
87 Correct 63 ms 108292 KB Output is correct
88 Correct 13 ms 96860 KB Output is correct
89 Correct 66 ms 108404 KB Output is correct
90 Correct 102 ms 121276 KB Output is correct
91 Correct 126 ms 135368 KB Output is correct
92 Correct 51 ms 108268 KB Output is correct
93 Correct 12 ms 97368 KB Output is correct
94 Correct 10 ms 96892 KB Output is correct
95 Correct 94 ms 116224 KB Output is correct
96 Correct 114 ms 123504 KB Output is correct
97 Correct 12 ms 97372 KB Output is correct
98 Correct 10 ms 96796 KB Output is correct
99 Correct 74 ms 112092 KB Output is correct
100 Correct 12 ms 97372 KB Output is correct
101 Correct 74 ms 110536 KB Output is correct
102 Correct 114 ms 121968 KB Output is correct
103 Correct 12 ms 97372 KB Output is correct
104 Correct 12 ms 97624 KB Output is correct
105 Correct 12 ms 97372 KB Output is correct
106 Correct 12 ms 97116 KB Output is correct
107 Correct 11 ms 97264 KB Output is correct
108 Correct 505 ms 171496 KB Output is correct
109 Correct 540 ms 179256 KB Output is correct
110 Correct 567 ms 194744 KB Output is correct
111 Correct 764 ms 235196 KB Output is correct
112 Correct 732 ms 224912 KB Output is correct
113 Correct 710 ms 191436 KB Output is correct
114 Correct 378 ms 153508 KB Output is correct
115 Correct 368 ms 153720 KB Output is correct
116 Correct 653 ms 229980 KB Output is correct
117 Runtime error 531 ms 262144 KB Execution killed with signal 9
118 Halted 0 ms 0 KB -