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답안 #1048924

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1048924 2024-08-08T11:13:32 Z 1L1YA Mergers (JOI19_mergers) C++17
70 / 100
 980 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=20;

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 9 ms 78424 KB Output is correct
2 Correct 9 ms 78428 KB Output is correct
3 Correct 8 ms 78428 KB Output is correct
4 Correct 8 ms 78428 KB Output is correct
5 Correct 9 ms 76380 KB Output is correct
6 Correct 8 ms 78428 KB Output is correct
7 Correct 10 ms 78424 KB Output is correct
8 Correct 10 ms 78428 KB Output is correct
9 Correct 10 ms 78424 KB Output is correct
10 Correct 9 ms 78424 KB Output is correct
11 Correct 9 ms 78292 KB Output is correct
12 Correct 9 ms 78424 KB Output is correct
13 Correct 9 ms 78440 KB Output is correct
14 Correct 9 ms 78428 KB Output is correct
15 Correct 10 ms 76380 KB Output is correct
16 Correct 8 ms 76380 KB Output is correct
17 Correct 8 ms 76268 KB Output is correct
18 Correct 9 ms 78508 KB Output is correct
19 Correct 9 ms 78428 KB Output is correct
20 Correct 9 ms 78348 KB Output is correct
21 Correct 8 ms 78428 KB Output is correct
22 Correct 8 ms 78428 KB Output is correct
23 Correct 9 ms 78396 KB Output is correct
24 Correct 10 ms 78500 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 78424 KB Output is correct
2 Correct 9 ms 78428 KB Output is correct
3 Correct 8 ms 78428 KB Output is correct
4 Correct 8 ms 78428 KB Output is correct
5 Correct 9 ms 76380 KB Output is correct
6 Correct 8 ms 78428 KB Output is correct
7 Correct 10 ms 78424 KB Output is correct
8 Correct 10 ms 78428 KB Output is correct
9 Correct 10 ms 78424 KB Output is correct
10 Correct 9 ms 78424 KB Output is correct
11 Correct 9 ms 78292 KB Output is correct
12 Correct 9 ms 78424 KB Output is correct
13 Correct 9 ms 78440 KB Output is correct
14 Correct 9 ms 78428 KB Output is correct
15 Correct 10 ms 76380 KB Output is correct
16 Correct 8 ms 76380 KB Output is correct
17 Correct 8 ms 76268 KB Output is correct
18 Correct 9 ms 78508 KB Output is correct
19 Correct 9 ms 78428 KB Output is correct
20 Correct 9 ms 78348 KB Output is correct
21 Correct 8 ms 78428 KB Output is correct
22 Correct 8 ms 78428 KB Output is correct
23 Correct 9 ms 78396 KB Output is correct
24 Correct 10 ms 78500 KB Output is correct
25 Correct 10 ms 76376 KB Output is correct
26 Correct 11 ms 77148 KB Output is correct
27 Correct 10 ms 76636 KB Output is correct
28 Correct 10 ms 77248 KB Output is correct
29 Correct 11 ms 77328 KB Output is correct
30 Correct 11 ms 76888 KB Output is correct
31 Correct 9 ms 78428 KB Output is correct
32 Correct 10 ms 79356 KB Output is correct
33 Correct 9 ms 76380 KB Output is correct
34 Correct 10 ms 78684 KB Output is correct
35 Correct 12 ms 79452 KB Output is correct
36 Correct 10 ms 78684 KB Output is correct
37 Correct 10 ms 77148 KB Output is correct
38 Correct 9 ms 78352 KB Output is correct
39 Correct 11 ms 77148 KB Output is correct
40 Correct 10 ms 78684 KB Output is correct
41 Correct 11 ms 78672 KB Output is correct
42 Correct 10 ms 78940 KB Output is correct
43 Correct 10 ms 77148 KB Output is correct
44 Correct 9 ms 78428 KB Output is correct
45 Correct 10 ms 77148 KB Output is correct
46 Correct 11 ms 78940 KB Output is correct
47 Correct 11 ms 78428 KB Output is correct
48 Correct 10 ms 76892 KB Output is correct
49 Correct 10 ms 76892 KB Output is correct
50 Correct 10 ms 79188 KB Output is correct
51 Correct 10 ms 78988 KB Output is correct
52 Correct 10 ms 76636 KB Output is correct
53 Correct 10 ms 78940 KB Output is correct
54 Correct 10 ms 79064 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 78424 KB Output is correct
2 Correct 9 ms 78428 KB Output is correct
3 Correct 8 ms 78428 KB Output is correct
4 Correct 8 ms 78428 KB Output is correct
5 Correct 9 ms 76380 KB Output is correct
6 Correct 8 ms 78428 KB Output is correct
7 Correct 10 ms 78424 KB Output is correct
8 Correct 10 ms 78428 KB Output is correct
9 Correct 10 ms 78424 KB Output is correct
10 Correct 9 ms 78424 KB Output is correct
11 Correct 9 ms 78292 KB Output is correct
12 Correct 9 ms 78424 KB Output is correct
13 Correct 9 ms 78440 KB Output is correct
14 Correct 9 ms 78428 KB Output is correct
15 Correct 10 ms 76380 KB Output is correct
16 Correct 8 ms 76380 KB Output is correct
17 Correct 8 ms 76268 KB Output is correct
18 Correct 9 ms 78508 KB Output is correct
19 Correct 9 ms 78428 KB Output is correct
20 Correct 9 ms 78348 KB Output is correct
21 Correct 8 ms 78428 KB Output is correct
22 Correct 8 ms 78428 KB Output is correct
23 Correct 9 ms 78396 KB Output is correct
24 Correct 10 ms 78500 KB Output is correct
25 Correct 9 ms 78424 KB Output is correct
26 Correct 51 ms 89240 KB Output is correct
27 Correct 86 ms 97220 KB Output is correct
28 Correct 10 ms 78684 KB Output is correct
29 Correct 7 ms 55896 KB Output is correct
30 Correct 7 ms 57948 KB Output is correct
31 Correct 58 ms 72668 KB Output is correct
32 Correct 8 ms 58344 KB Output is correct
33 Correct 76 ms 82744 KB Output is correct
34 Correct 74 ms 79560 KB Output is correct
35 Correct 11 ms 58460 KB Output is correct
36 Correct 70 ms 75348 KB Output is correct
37 Correct 9 ms 58460 KB Output is correct
38 Correct 11 ms 58460 KB Output is correct
39 Correct 48 ms 72980 KB Output is correct
40 Correct 9 ms 58716 KB Output is correct
41 Correct 60 ms 74212 KB Output is correct
42 Correct 74 ms 77512 KB Output is correct
43 Correct 9 ms 57948 KB Output is correct
44 Correct 74 ms 99320 KB Output is correct
45 Correct 81 ms 96964 KB Output is correct
46 Correct 10 ms 76636 KB Output is correct
47 Correct 11 ms 79064 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 57 ms 90796 KB Output is correct
2 Correct 95 ms 98336 KB Output is correct
3 Correct 13 ms 77004 KB Output is correct
4 Correct 12 ms 78684 KB Output is correct
5 Correct 9 ms 76380 KB Output is correct
6 Correct 10 ms 76308 KB Output is correct
7 Correct 10 ms 78680 KB Output is correct
8 Correct 104 ms 104608 KB Output is correct
9 Correct 11 ms 78684 KB Output is correct
10 Correct 70 ms 90840 KB Output is correct
11 Correct 10 ms 76380 KB Output is correct
12 Correct 73 ms 90948 KB Output is correct
13 Correct 96 ms 103620 KB Output is correct
14 Correct 146 ms 117660 KB Output is correct
15 Correct 51 ms 90824 KB Output is correct
16 Correct 11 ms 76892 KB Output is correct
17 Correct 9 ms 80468 KB Output is correct
18 Correct 100 ms 100296 KB Output is correct
19 Correct 112 ms 107488 KB Output is correct
20 Correct 11 ms 81156 KB Output is correct
21 Correct 9 ms 80408 KB Output is correct
22 Correct 92 ms 97716 KB Output is correct
23 Correct 11 ms 83052 KB Output is correct
24 Correct 78 ms 94732 KB Output is correct
25 Correct 122 ms 105920 KB Output is correct
26 Correct 11 ms 83036 KB Output is correct
27 Correct 12 ms 81128 KB Output is correct
28 Correct 11 ms 82964 KB Output is correct
29 Correct 10 ms 80732 KB Output is correct
30 Correct 10 ms 80988 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 78424 KB Output is correct
2 Correct 9 ms 78428 KB Output is correct
3 Correct 8 ms 78428 KB Output is correct
4 Correct 8 ms 78428 KB Output is correct
5 Correct 9 ms 76380 KB Output is correct
6 Correct 8 ms 78428 KB Output is correct
7 Correct 10 ms 78424 KB Output is correct
8 Correct 10 ms 78428 KB Output is correct
9 Correct 10 ms 78424 KB Output is correct
10 Correct 9 ms 78424 KB Output is correct
11 Correct 9 ms 78292 KB Output is correct
12 Correct 9 ms 78424 KB Output is correct
13 Correct 9 ms 78440 KB Output is correct
14 Correct 9 ms 78428 KB Output is correct
15 Correct 10 ms 76380 KB Output is correct
16 Correct 8 ms 76380 KB Output is correct
17 Correct 8 ms 76268 KB Output is correct
18 Correct 9 ms 78508 KB Output is correct
19 Correct 9 ms 78428 KB Output is correct
20 Correct 9 ms 78348 KB Output is correct
21 Correct 8 ms 78428 KB Output is correct
22 Correct 8 ms 78428 KB Output is correct
23 Correct 9 ms 78396 KB Output is correct
24 Correct 10 ms 78500 KB Output is correct
25 Correct 10 ms 76376 KB Output is correct
26 Correct 11 ms 77148 KB Output is correct
27 Correct 10 ms 76636 KB Output is correct
28 Correct 10 ms 77248 KB Output is correct
29 Correct 11 ms 77328 KB Output is correct
30 Correct 11 ms 76888 KB Output is correct
31 Correct 9 ms 78428 KB Output is correct
32 Correct 10 ms 79356 KB Output is correct
33 Correct 9 ms 76380 KB Output is correct
34 Correct 10 ms 78684 KB Output is correct
35 Correct 12 ms 79452 KB Output is correct
36 Correct 10 ms 78684 KB Output is correct
37 Correct 10 ms 77148 KB Output is correct
38 Correct 9 ms 78352 KB Output is correct
39 Correct 11 ms 77148 KB Output is correct
40 Correct 10 ms 78684 KB Output is correct
41 Correct 11 ms 78672 KB Output is correct
42 Correct 10 ms 78940 KB Output is correct
43 Correct 10 ms 77148 KB Output is correct
44 Correct 9 ms 78428 KB Output is correct
45 Correct 10 ms 77148 KB Output is correct
46 Correct 11 ms 78940 KB Output is correct
47 Correct 11 ms 78428 KB Output is correct
48 Correct 10 ms 76892 KB Output is correct
49 Correct 10 ms 76892 KB Output is correct
50 Correct 10 ms 79188 KB Output is correct
51 Correct 10 ms 78988 KB Output is correct
52 Correct 10 ms 76636 KB Output is correct
53 Correct 10 ms 78940 KB Output is correct
54 Correct 10 ms 79064 KB Output is correct
55 Correct 9 ms 78424 KB Output is correct
56 Correct 51 ms 89240 KB Output is correct
57 Correct 86 ms 97220 KB Output is correct
58 Correct 10 ms 78684 KB Output is correct
59 Correct 7 ms 55896 KB Output is correct
60 Correct 7 ms 57948 KB Output is correct
61 Correct 58 ms 72668 KB Output is correct
62 Correct 8 ms 58344 KB Output is correct
63 Correct 76 ms 82744 KB Output is correct
64 Correct 74 ms 79560 KB Output is correct
65 Correct 11 ms 58460 KB Output is correct
66 Correct 70 ms 75348 KB Output is correct
67 Correct 9 ms 58460 KB Output is correct
68 Correct 11 ms 58460 KB Output is correct
69 Correct 48 ms 72980 KB Output is correct
70 Correct 9 ms 58716 KB Output is correct
71 Correct 60 ms 74212 KB Output is correct
72 Correct 74 ms 77512 KB Output is correct
73 Correct 9 ms 57948 KB Output is correct
74 Correct 74 ms 99320 KB Output is correct
75 Correct 81 ms 96964 KB Output is correct
76 Correct 10 ms 76636 KB Output is correct
77 Correct 11 ms 79064 KB Output is correct
78 Correct 57 ms 90796 KB Output is correct
79 Correct 95 ms 98336 KB Output is correct
80 Correct 13 ms 77004 KB Output is correct
81 Correct 12 ms 78684 KB Output is correct
82 Correct 9 ms 76380 KB Output is correct
83 Correct 10 ms 76308 KB Output is correct
84 Correct 10 ms 78680 KB Output is correct
85 Correct 104 ms 104608 KB Output is correct
86 Correct 11 ms 78684 KB Output is correct
87 Correct 70 ms 90840 KB Output is correct
88 Correct 10 ms 76380 KB Output is correct
89 Correct 73 ms 90948 KB Output is correct
90 Correct 96 ms 103620 KB Output is correct
91 Correct 146 ms 117660 KB Output is correct
92 Correct 51 ms 90824 KB Output is correct
93 Correct 11 ms 76892 KB Output is correct
94 Correct 9 ms 80468 KB Output is correct
95 Correct 100 ms 100296 KB Output is correct
96 Correct 112 ms 107488 KB Output is correct
97 Correct 11 ms 81156 KB Output is correct
98 Correct 9 ms 80408 KB Output is correct
99 Correct 92 ms 97716 KB Output is correct
100 Correct 11 ms 83052 KB Output is correct
101 Correct 78 ms 94732 KB Output is correct
102 Correct 122 ms 105920 KB Output is correct
103 Correct 11 ms 83036 KB Output is correct
104 Correct 12 ms 81128 KB Output is correct
105 Correct 11 ms 82964 KB Output is correct
106 Correct 10 ms 80732 KB Output is correct
107 Correct 10 ms 80988 KB Output is correct
108 Correct 537 ms 155632 KB Output is correct
109 Correct 626 ms 165600 KB Output is correct
110 Correct 615 ms 181444 KB Output is correct
111 Correct 980 ms 219292 KB Output is correct
112 Correct 835 ms 211728 KB Output is correct
113 Correct 707 ms 178100 KB Output is correct
114 Correct 411 ms 142384 KB Output is correct
115 Correct 379 ms 142220 KB Output is correct
116 Correct 626 ms 217100 KB Output is correct
117 Runtime error 542 ms 262144 KB Execution killed with signal 9
118 Halted 0 ms 0 KB -