oj.uz

Submission #1048914

# Submission time Handle Problem Language Result Execution time Memory
1048914 2024-08-08T11:05:18 Z 1L1YA Mergers (JOI19_mergers) C++17
70 / 100
 892 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

# Verdict Execution time Memory Grader output
1 Correct 10 ms 92760 KB Output is correct
2 Correct 10 ms 92760 KB Output is correct
3 Correct 10 ms 92604 KB Output is correct
4 Correct 10 ms 92764 KB Output is correct
5 Correct 10 ms 92764 KB Output is correct
6 Correct 9 ms 92632 KB Output is correct
7 Correct 10 ms 92760 KB Output is correct
8 Correct 10 ms 92804 KB Output is correct
9 Correct 10 ms 92764 KB Output is correct
10 Correct 10 ms 92600 KB Output is correct
11 Correct 10 ms 92764 KB Output is correct
12 Correct 9 ms 92812 KB Output is correct
13 Correct 9 ms 92604 KB Output is correct
14 Correct 9 ms 92764 KB Output is correct
15 Correct 9 ms 92764 KB Output is correct
16 Correct 9 ms 92652 KB Output is correct
17 Correct 9 ms 92764 KB Output is correct
18 Correct 10 ms 92764 KB Output is correct
19 Correct 10 ms 92764 KB Output is correct
20 Correct 10 ms 92648 KB Output is correct
21 Correct 10 ms 92668 KB Output is correct
22 Correct 10 ms 92764 KB Output is correct
23 Correct 10 ms 92760 KB Output is correct
24 Correct 10 ms 92608 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 92760 KB Output is correct
2 Correct 10 ms 92760 KB Output is correct
3 Correct 10 ms 92604 KB Output is correct
4 Correct 10 ms 92764 KB Output is correct
5 Correct 10 ms 92764 KB Output is correct
6 Correct 9 ms 92632 KB Output is correct
7 Correct 10 ms 92760 KB Output is correct
8 Correct 10 ms 92804 KB Output is correct
9 Correct 10 ms 92764 KB Output is correct
10 Correct 10 ms 92600 KB Output is correct
11 Correct 10 ms 92764 KB Output is correct
12 Correct 9 ms 92812 KB Output is correct
13 Correct 9 ms 92604 KB Output is correct
14 Correct 9 ms 92764 KB Output is correct
15 Correct 9 ms 92764 KB Output is correct
16 Correct 9 ms 92652 KB Output is correct
17 Correct 9 ms 92764 KB Output is correct
18 Correct 10 ms 92764 KB Output is correct
19 Correct 10 ms 92764 KB Output is correct
20 Correct 10 ms 92648 KB Output is correct
21 Correct 10 ms 92668 KB Output is correct
22 Correct 10 ms 92764 KB Output is correct
23 Correct 10 ms 92760 KB Output is correct
24 Correct 10 ms 92608 KB Output is correct
25 Correct 10 ms 92764 KB Output is correct
26 Correct 12 ms 93496 KB Output is correct
27 Correct 11 ms 92980 KB Output is correct
28 Correct 12 ms 93556 KB Output is correct
29 Correct 12 ms 93532 KB Output is correct
30 Correct 11 ms 93188 KB Output is correct
31 Correct 9 ms 93000 KB Output is correct
32 Correct 12 ms 93456 KB Output is correct
33 Correct 10 ms 92760 KB Output is correct
34 Correct 11 ms 92908 KB Output is correct
35 Correct 12 ms 93532 KB Output is correct
36 Correct 11 ms 93108 KB Output is correct
37 Correct 12 ms 93276 KB Output is correct
38 Correct 9 ms 92752 KB Output is correct
39 Correct 12 ms 93528 KB Output is correct
40 Correct 11 ms 92948 KB Output is correct
41 Correct 11 ms 93016 KB Output is correct
42 Correct 11 ms 93248 KB Output is correct
43 Correct 11 ms 93404 KB Output is correct
44 Correct 10 ms 92764 KB Output is correct
45 Correct 12 ms 93532 KB Output is correct
46 Correct 12 ms 93276 KB Output is correct
47 Correct 10 ms 92764 KB Output is correct
48 Correct 12 ms 93248 KB Output is correct
49 Correct 11 ms 93272 KB Output is correct
50 Correct 12 ms 93364 KB Output is correct
51 Correct 11 ms 93020 KB Output is correct
52 Correct 11 ms 92964 KB Output is correct
53 Correct 11 ms 93020 KB Output is correct
54 Correct 12 ms 93212 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 92760 KB Output is correct
2 Correct 10 ms 92760 KB Output is correct
3 Correct 10 ms 92604 KB Output is correct
4 Correct 10 ms 92764 KB Output is correct
5 Correct 10 ms 92764 KB Output is correct
6 Correct 9 ms 92632 KB Output is correct
7 Correct 10 ms 92760 KB Output is correct
8 Correct 10 ms 92804 KB Output is correct
9 Correct 10 ms 92764 KB Output is correct
10 Correct 10 ms 92600 KB Output is correct
11 Correct 10 ms 92764 KB Output is correct
12 Correct 9 ms 92812 KB Output is correct
13 Correct 9 ms 92604 KB Output is correct
14 Correct 9 ms 92764 KB Output is correct
15 Correct 9 ms 92764 KB Output is correct
16 Correct 9 ms 92652 KB Output is correct
17 Correct 9 ms 92764 KB Output is correct
18 Correct 10 ms 92764 KB Output is correct
19 Correct 10 ms 92764 KB Output is correct
20 Correct 10 ms 92648 KB Output is correct
21 Correct 10 ms 92668 KB Output is correct
22 Correct 10 ms 92764 KB Output is correct
23 Correct 10 ms 92760 KB Output is correct
24 Correct 10 ms 92608 KB Output is correct
25 Correct 10 ms 92812 KB Output is correct
26 Correct 51 ms 103524 KB Output is correct
27 Correct 83 ms 109812 KB Output is correct
28 Correct 11 ms 93016 KB Output is correct
29 Correct 10 ms 92764 KB Output is correct
30 Correct 10 ms 92764 KB Output is correct
31 Correct 62 ms 103388 KB Output is correct
32 Correct 13 ms 93152 KB Output is correct
33 Correct 77 ms 113364 KB Output is correct
34 Correct 77 ms 108724 KB Output is correct
35 Correct 11 ms 93020 KB Output is correct
36 Correct 69 ms 104400 KB Output is correct
37 Correct 11 ms 92904 KB Output is correct
38 Correct 11 ms 93020 KB Output is correct
39 Correct 54 ms 103624 KB Output is correct
40 Correct 11 ms 93272 KB Output is correct
41 Correct 65 ms 103112 KB Output is correct
42 Correct 74 ms 106404 KB Output is correct
43 Correct 11 ms 92760 KB Output is correct
44 Correct 72 ms 113768 KB Output is correct
45 Correct 75 ms 109568 KB Output is correct
46 Correct 11 ms 92912 KB Output is correct
47 Correct 12 ms 93276 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 103876 KB Output is correct
2 Correct 82 ms 110952 KB Output is correct
3 Correct 12 ms 93276 KB Output is correct
4 Correct 11 ms 92920 KB Output is correct
5 Correct 10 ms 92760 KB Output is correct
6 Correct 9 ms 92772 KB Output is correct
7 Correct 11 ms 93020 KB Output is correct
8 Correct 103 ms 117180 KB Output is correct
9 Correct 11 ms 93020 KB Output is correct
10 Correct 66 ms 103616 KB Output is correct
11 Correct 10 ms 92760 KB Output is correct
12 Correct 70 ms 103416 KB Output is correct
13 Correct 99 ms 116240 KB Output is correct
14 Correct 129 ms 130440 KB Output is correct
15 Correct 56 ms 103620 KB Output is correct
16 Correct 11 ms 93276 KB Output is correct
17 Correct 9 ms 92724 KB Output is correct
18 Correct 93 ms 111140 KB Output is correct
19 Correct 99 ms 118604 KB Output is correct
20 Correct 12 ms 93276 KB Output is correct
21 Correct 10 ms 92764 KB Output is correct
22 Correct 73 ms 107168 KB Output is correct
23 Correct 12 ms 93020 KB Output is correct
24 Correct 74 ms 105692 KB Output is correct
25 Correct 114 ms 116868 KB Output is correct
26 Correct 12 ms 93276 KB Output is correct
27 Correct 13 ms 93544 KB Output is correct
28 Correct 11 ms 93016 KB Output is correct
29 Correct 11 ms 92976 KB Output is correct
30 Correct 11 ms 93020 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 92760 KB Output is correct
2 Correct 10 ms 92760 KB Output is correct
3 Correct 10 ms 92604 KB Output is correct
4 Correct 10 ms 92764 KB Output is correct
5 Correct 10 ms 92764 KB Output is correct
6 Correct 9 ms 92632 KB Output is correct
7 Correct 10 ms 92760 KB Output is correct
8 Correct 10 ms 92804 KB Output is correct
9 Correct 10 ms 92764 KB Output is correct
10 Correct 10 ms 92600 KB Output is correct
11 Correct 10 ms 92764 KB Output is correct
12 Correct 9 ms 92812 KB Output is correct
13 Correct 9 ms 92604 KB Output is correct
14 Correct 9 ms 92764 KB Output is correct
15 Correct 9 ms 92764 KB Output is correct
16 Correct 9 ms 92652 KB Output is correct
17 Correct 9 ms 92764 KB Output is correct
18 Correct 10 ms 92764 KB Output is correct
19 Correct 10 ms 92764 KB Output is correct
20 Correct 10 ms 92648 KB Output is correct
21 Correct 10 ms 92668 KB Output is correct
22 Correct 10 ms 92764 KB Output is correct
23 Correct 10 ms 92760 KB Output is correct
24 Correct 10 ms 92608 KB Output is correct
25 Correct 10 ms 92764 KB Output is correct
26 Correct 12 ms 93496 KB Output is correct
27 Correct 11 ms 92980 KB Output is correct
28 Correct 12 ms 93556 KB Output is correct
29 Correct 12 ms 93532 KB Output is correct
30 Correct 11 ms 93188 KB Output is correct
31 Correct 9 ms 93000 KB Output is correct
32 Correct 12 ms 93456 KB Output is correct
33 Correct 10 ms 92760 KB Output is correct
34 Correct 11 ms 92908 KB Output is correct
35 Correct 12 ms 93532 KB Output is correct
36 Correct 11 ms 93108 KB Output is correct
37 Correct 12 ms 93276 KB Output is correct
38 Correct 9 ms 92752 KB Output is correct
39 Correct 12 ms 93528 KB Output is correct
40 Correct 11 ms 92948 KB Output is correct
41 Correct 11 ms 93016 KB Output is correct
42 Correct 11 ms 93248 KB Output is correct
43 Correct 11 ms 93404 KB Output is correct
44 Correct 10 ms 92764 KB Output is correct
45 Correct 12 ms 93532 KB Output is correct
46 Correct 12 ms 93276 KB Output is correct
47 Correct 10 ms 92764 KB Output is correct
48 Correct 12 ms 93248 KB Output is correct
49 Correct 11 ms 93272 KB Output is correct
50 Correct 12 ms 93364 KB Output is correct
51 Correct 11 ms 93020 KB Output is correct
52 Correct 11 ms 92964 KB Output is correct
53 Correct 11 ms 93020 KB Output is correct
54 Correct 12 ms 93212 KB Output is correct
55 Correct 10 ms 92812 KB Output is correct
56 Correct 51 ms 103524 KB Output is correct
57 Correct 83 ms 109812 KB Output is correct
58 Correct 11 ms 93016 KB Output is correct
59 Correct 10 ms 92764 KB Output is correct
60 Correct 10 ms 92764 KB Output is correct
61 Correct 62 ms 103388 KB Output is correct
62 Correct 13 ms 93152 KB Output is correct
63 Correct 77 ms 113364 KB Output is correct
64 Correct 77 ms 108724 KB Output is correct
65 Correct 11 ms 93020 KB Output is correct
66 Correct 69 ms 104400 KB Output is correct
67 Correct 11 ms 92904 KB Output is correct
68 Correct 11 ms 93020 KB Output is correct
69 Correct 54 ms 103624 KB Output is correct
70 Correct 11 ms 93272 KB Output is correct
71 Correct 65 ms 103112 KB Output is correct
72 Correct 74 ms 106404 KB Output is correct
73 Correct 11 ms 92760 KB Output is correct
74 Correct 72 ms 113768 KB Output is correct
75 Correct 75 ms 109568 KB Output is correct
76 Correct 11 ms 92912 KB Output is correct
77 Correct 12 ms 93276 KB Output is correct
78 Correct 50 ms 103876 KB Output is correct
79 Correct 82 ms 110952 KB Output is correct
80 Correct 12 ms 93276 KB Output is correct
81 Correct 11 ms 92920 KB Output is correct
82 Correct 10 ms 92760 KB Output is correct
83 Correct 9 ms 92772 KB Output is correct
84 Correct 11 ms 93020 KB Output is correct
85 Correct 103 ms 117180 KB Output is correct
86 Correct 11 ms 93020 KB Output is correct
87 Correct 66 ms 103616 KB Output is correct
88 Correct 10 ms 92760 KB Output is correct
89 Correct 70 ms 103416 KB Output is correct
90 Correct 99 ms 116240 KB Output is correct
91 Correct 129 ms 130440 KB Output is correct
92 Correct 56 ms 103620 KB Output is correct
93 Correct 11 ms 93276 KB Output is correct
94 Correct 9 ms 92724 KB Output is correct
95 Correct 93 ms 111140 KB Output is correct
96 Correct 99 ms 118604 KB Output is correct
97 Correct 12 ms 93276 KB Output is correct
98 Correct 10 ms 92764 KB Output is correct
99 Correct 73 ms 107168 KB Output is correct
100 Correct 12 ms 93020 KB Output is correct
101 Correct 74 ms 105692 KB Output is correct
102 Correct 114 ms 116868 KB Output is correct
103 Correct 12 ms 93276 KB Output is correct
104 Correct 13 ms 93544 KB Output is correct
105 Correct 11 ms 93016 KB Output is correct
106 Correct 11 ms 92976 KB Output is correct
107 Correct 11 ms 93020 KB Output is correct
108 Correct 557 ms 160660 KB Output is correct
109 Correct 624 ms 169612 KB Output is correct
110 Correct 645 ms 185432 KB Output is correct
111 Correct 892 ms 224340 KB Output is correct
112 Correct 877 ms 214176 KB Output is correct
113 Correct 763 ms 180832 KB Output is correct
114 Correct 413 ms 144400 KB Output is correct
115 Correct 373 ms 144140 KB Output is correct
116 Correct 603 ms 219968 KB Output is correct
117 Runtime error 538 ms 262144 KB Execution killed with signal 9
118 Halted 0 ms 0 KB -