oj.uz

Submission #743333

# Submission time Handle Problem Language Result Execution time Memory
743333 2023-05-17T09:54:12 Z myrcella Mergers (JOI19_mergers) C++17
56 / 100
 3000 ms 42444 KB 
//by szh
#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 5e5+10;

int n,m;
vector <int> edge[maxn];
int dep[maxn];
int f[maxn];
int deg[maxn];
vector <int> node[maxn];
int col[maxn];
int par[maxn];

void dfs(int u,int fa) {
	par[u] = fa;
	dep[u] = dep[fa] + 1;
	for (int v:edge[u]) {
		if (v==fa) continue;
		dfs(v,u);
	}
	return;
}

int getf(int x) {
	if (f[x]==x) return x;
	else return f[x] = getf(f[x]);
}

void merge(int x,int y) {
	f[getf(x)] = getf(y);
}

void update(int u,int v) {
//	debug(u),debug(v);
	int tmp = col[u];
	if (dep[u]<dep[v]) swap(u,v);
	while (dep[u]>dep[v]) u = par[u],merge(col[u],tmp);
	while (u!=v) {
		u = par[u],merge(col[u],tmp);
		v = par[v],merge(col[v],tmp);
	}
	return;
}

map <pii,int> mp;

int main() {
//	freopen("input.txt","r",stdin);	
	std::ios::sync_with_stdio(false);cin.tie(0);
	cin>>n>>m;
	rep(i,1,m+1) f[i] = i;
	rep(i,1,n) {
		int u,v;
		cin>>u>>v;
		edge[u].pb(v);
		edge[v].pb(u);
	}
	dfs(1,0);
	rep(i,1,n+1) {
		int c;cin>>c;
		col[i] = c;
		node[c].pb(i);
	}
//	rep(i,1,n+1)
//		rep(j,1,i) if (col[i]==col[j]) update(i,j);
	rep(i,1,m+1) {
		if (node[i].empty()) continue;
		int tmp = node[i][0];
		rep(j,1,SZ(node[i])) update(tmp,node[i][j]);
	}
	rep(i,1,n+1) 
		for (int v:edge[i]) {
			int fx = getf(col[i]), fy = getf(col[v]);
			if (fx==fy) continue;
			if (fx>fy) swap(fx,fy);
			if (mp.find({fx,fy})!=mp.end()) continue;
			mp[{fx,fy}]=1;
			deg[fx]++;
			deg[fy]++;
		}
	int hii = 0;
	int cnt = 0;
	rep(i,1,m+1) {
		if (getf(i)==i) hii++;
		if (getf(i)==i and deg[i]==1) cnt++;
	}
	assert(SZ(mp)==hii-1);
	cout<<(cnt+1)/2;
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23820 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 14 ms 23848 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 14 ms 23824 KB Output is correct
7 Correct 15 ms 23816 KB Output is correct
8 Correct 13 ms 23840 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 17 ms 23776 KB Output is correct
12 Correct 13 ms 23768 KB Output is correct
13 Correct 13 ms 23780 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 16 ms 23728 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23788 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 16 ms 23764 KB Output is correct
20 Correct 13 ms 23820 KB Output is correct
21 Correct 12 ms 23812 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23824 KB Output is correct
24 Correct 12 ms 23824 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23820 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 14 ms 23848 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 14 ms 23824 KB Output is correct
7 Correct 15 ms 23816 KB Output is correct
8 Correct 13 ms 23840 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 17 ms 23776 KB Output is correct
12 Correct 13 ms 23768 KB Output is correct
13 Correct 13 ms 23780 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 16 ms 23728 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23788 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 16 ms 23764 KB Output is correct
20 Correct 13 ms 23820 KB Output is correct
21 Correct 12 ms 23812 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23824 KB Output is correct
24 Correct 12 ms 23824 KB Output is correct
25 Correct 11 ms 23764 KB Output is correct
26 Correct 14 ms 24096 KB Output is correct
27 Correct 14 ms 23960 KB Output is correct
28 Correct 16 ms 24268 KB Output is correct
29 Correct 20 ms 24308 KB Output is correct
30 Correct 15 ms 24000 KB Output is correct
31 Correct 15 ms 23892 KB Output is correct
32 Correct 16 ms 24268 KB Output is correct
33 Correct 13 ms 23824 KB Output is correct
34 Correct 14 ms 23964 KB Output is correct
35 Correct 15 ms 24268 KB Output is correct
36 Correct 14 ms 24020 KB Output is correct
37 Correct 14 ms 24092 KB Output is correct
38 Correct 14 ms 23764 KB Output is correct
39 Correct 18 ms 24020 KB Output is correct
40 Correct 15 ms 23952 KB Output is correct
41 Correct 15 ms 23964 KB Output is correct
42 Correct 14 ms 24056 KB Output is correct
43 Correct 58 ms 24160 KB Output is correct
44 Correct 15 ms 23764 KB Output is correct
45 Correct 14 ms 24148 KB Output is correct
46 Correct 14 ms 24096 KB Output is correct
47 Correct 13 ms 23828 KB Output is correct
48 Correct 14 ms 24148 KB Output is correct
49 Correct 16 ms 24316 KB Output is correct
50 Correct 15 ms 24276 KB Output is correct
51 Correct 16 ms 24052 KB Output is correct
52 Correct 15 ms 23952 KB Output is correct
53 Correct 17 ms 24020 KB Output is correct
54 Correct 14 ms 23968 KB Output is correct

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23820 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 14 ms 23848 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 14 ms 23824 KB Output is correct
7 Correct 15 ms 23816 KB Output is correct
8 Correct 13 ms 23840 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 17 ms 23776 KB Output is correct
12 Correct 13 ms 23768 KB Output is correct
13 Correct 13 ms 23780 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 16 ms 23728 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23788 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 16 ms 23764 KB Output is correct
20 Correct 13 ms 23820 KB Output is correct
21 Correct 12 ms 23812 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23824 KB Output is correct
24 Correct 12 ms 23824 KB Output is correct
25 Correct 15 ms 23824 KB Output is correct
26 Correct 52 ms 30444 KB Output is correct
27 Correct 88 ms 30136 KB Output is correct
28 Correct 14 ms 24020 KB Output is correct
29 Correct 15 ms 23892 KB Output is correct
30 Correct 14 ms 23764 KB Output is correct
31 Correct 96 ms 30136 KB Output is correct
32 Correct 15 ms 23960 KB Output is correct
33 Execution timed out 3075 ms 34380 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 29256 KB Output is correct
2 Correct 133 ms 40396 KB Output is correct
3 Correct 15 ms 24152 KB Output is correct
4 Correct 15 ms 23944 KB Output is correct
5 Correct 14 ms 23820 KB Output is correct
6 Correct 14 ms 23764 KB Output is correct
7 Correct 18 ms 24040 KB Output is correct
8 Correct 100 ms 32508 KB Output is correct
9 Correct 14 ms 23964 KB Output is correct
10 Correct 70 ms 30248 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 105 ms 30212 KB Output is correct
13 Correct 92 ms 33076 KB Output is correct
14 Correct 161 ms 40240 KB Output is correct
15 Correct 51 ms 30464 KB Output is correct
16 Correct 18 ms 24040 KB Output is correct
17 Correct 17 ms 23764 KB Output is correct
18 Correct 125 ms 38884 KB Output is correct
19 Correct 153 ms 42444 KB Output is correct
20 Correct 14 ms 24020 KB Output is correct
21 Correct 13 ms 23832 KB Output is correct
22 Correct 71 ms 33404 KB Output is correct
23 Correct 15 ms 23964 KB Output is correct
24 Correct 87 ms 31304 KB Output is correct
25 Correct 165 ms 41668 KB Output is correct
26 Correct 16 ms 24224 KB Output is correct
27 Correct 17 ms 24276 KB Output is correct
28 Correct 18 ms 24044 KB Output is correct
29 Correct 13 ms 24020 KB Output is correct
30 Correct 15 ms 24092 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23820 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 14 ms 23848 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 14 ms 23824 KB Output is correct
7 Correct 15 ms 23816 KB Output is correct
8 Correct 13 ms 23840 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 13 ms 23764 KB Output is correct
11 Correct 17 ms 23776 KB Output is correct
12 Correct 13 ms 23768 KB Output is correct
13 Correct 13 ms 23780 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 16 ms 23728 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23788 KB Output is correct
18 Correct 13 ms 23824 KB Output is correct
19 Correct 16 ms 23764 KB Output is correct
20 Correct 13 ms 23820 KB Output is correct
21 Correct 12 ms 23812 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct
23 Correct 12 ms 23824 KB Output is correct
24 Correct 12 ms 23824 KB Output is correct
25 Correct 11 ms 23764 KB Output is correct
26 Correct 14 ms 24096 KB Output is correct
27 Correct 14 ms 23960 KB Output is correct
28 Correct 16 ms 24268 KB Output is correct
29 Correct 20 ms 24308 KB Output is correct
30 Correct 15 ms 24000 KB Output is correct
31 Correct 15 ms 23892 KB Output is correct
32 Correct 16 ms 24268 KB Output is correct
33 Correct 13 ms 23824 KB Output is correct
34 Correct 14 ms 23964 KB Output is correct
35 Correct 15 ms 24268 KB Output is correct
36 Correct 14 ms 24020 KB Output is correct
37 Correct 14 ms 24092 KB Output is correct
38 Correct 14 ms 23764 KB Output is correct
39 Correct 18 ms 24020 KB Output is correct
40 Correct 15 ms 23952 KB Output is correct
41 Correct 15 ms 23964 KB Output is correct
42 Correct 14 ms 24056 KB Output is correct
43 Correct 58 ms 24160 KB Output is correct
44 Correct 15 ms 23764 KB Output is correct
45 Correct 14 ms 24148 KB Output is correct
46 Correct 14 ms 24096 KB Output is correct
47 Correct 13 ms 23828 KB Output is correct
48 Correct 14 ms 24148 KB Output is correct
49 Correct 16 ms 24316 KB Output is correct
50 Correct 15 ms 24276 KB Output is correct
51 Correct 16 ms 24052 KB Output is correct
52 Correct 15 ms 23952 KB Output is correct
53 Correct 17 ms 24020 KB Output is correct
54 Correct 14 ms 23968 KB Output is correct
55 Correct 15 ms 23824 KB Output is correct
56 Correct 52 ms 30444 KB Output is correct
57 Correct 88 ms 30136 KB Output is correct
58 Correct 14 ms 24020 KB Output is correct
59 Correct 15 ms 23892 KB Output is correct
60 Correct 14 ms 23764 KB Output is correct
61 Correct 96 ms 30136 KB Output is correct
62 Correct 15 ms 23960 KB Output is correct
63 Execution timed out 3075 ms 34380 KB Time limit exceeded
64 Halted 0 ms 0 KB -