oj.uz

Submission #545524

# Submission time Handle Problem Language Result Execution time Memory
545524 2022-04-04T18:23:20 Z NaimSS Mergers (JOI19_mergers) C++14
100 / 100
 919 ms 138516 KB 
#include <bits/stdc++.h>
#define ld long double
#define endl "\n"
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define ms(v,x) memset(v,x,sizeof(v))
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, a, b) for(int i = b-1; i>=a ; i--)
#define trav(a, x) for(auto& a : x)
#define allin(a , x) for(auto a : x)
#define Unique(v) sort(all(v));v.erase(unique(all(v)),v.end());
#define sz(v) ((int)v.size())
using namespace std;
typedef vector<int> vi;
#define y1 abacaba
//#define left oooooopss
#define db(x) cerr << #x <<" == "<<x << endl;
#define db2(x,y) cerr<<#x <<" == "<<x<<", "<<#y<<" == "<<y<<endl;
#define db3(x,y,z) cerr << #x<<" == "<<x<<", "<<#y<<" == "<<y<<", "<<#z<<" == "<<z<<endl;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
std::mt19937 rng((int) std::chrono::steady_clock::now().time_since_epoch().count());
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
inline ll mod(ll n, ll m ){ ll ret = n%m; if(ret < 0) ret += m; return ret; }
ll gcd(ll a, ll b){return (b == 0LL ? a : gcd(b, a%b));}
ll exp(ll b,ll e,ll m){
  b%=m;
  ll ans = 1;
  for (; e; b = b * b % m, e /= 2)
      if (e & 1) ans = ans * b % m;
  return ans;
}
  
// debug:
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T){ 
  cerr << ' ' << H; 
  dbg_out(T...); 
}
#ifdef LOCAL
#define dbg(...) cerr<<"(" << #__VA_ARGS__<<"):" , dbg_out(__VA_ARGS__) , cerr << endl
#else
#define dbg(...) 42
#endif
//

const int N = 500100;
vi g[N];
int S[N];
int p[N];
int cnt[N];
int f(int x){return p[x] = (p[x]==x?x:f(p[x]));}
void join(int a,int b){
	p[f(a)]=f(b);
}

pii e[N];

void dfs(int v,int p,map<int,int>&mp){
	if(cnt[S[v]]!=1)
		mp[S[v]] = 1;
	for(auto to : g[v])if(to!=p){
		map<int,int> nv;
		dfs(to,v,nv);
		if(sz(nv) > sz(mp))mp.swap(nv);

		for(auto it : nv){
			mp[it.ff]+=it.ss;
			if(mp[it.ff] == cnt[it.ff]){
				// todo mundo na subarvore. Cor n importa mais
				mp.erase(it.ff);
			}
		}
	}
	if(mp.size()!=0 && p!=-1){
		// alguem não ta dentro.
		// pode juntar com o pai
		join(v,p);
	}
}
int deg[N];
int32_t main(){
    fastio;
	int n,k;
	cin >> n >> k;
	rep(i,0,n-1){
		int a,b;
		cin >> a >> b;
		g[a].pb(b);
		g[b].pb(a);
		e[i] = pii(a,b);
	}
	rep(i,1,n+1)p[i]=i;
	rep(i,1,n+1)cin >> S[i],cnt[S[i]]++;
	map<int,int> mp;
	dfs(1,0,mp);
	rep(i,0,n-1){
		if(f(e[i].ff)!=f(e[i].ss)){
			deg[f(e[i].ff)]++;
			deg[f(e[i].ss)]++;
		}
	}
	int res=0;
	set<int> used;
	rep(i,1,n+1)used.insert(f(i));

	for(int i : used)
		if(deg[i]<=1)res++;
	
	if(res<=1)res=0;
	cout << (res + 1)/2 << endl;


    // math -> gcd it all
    // Did u check N=1? Did you switch N,M?
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12116 KB Output is correct
3 Correct 7 ms 12076 KB Output is correct
4 Correct 7 ms 12080 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 7 ms 12080 KB Output is correct
7 Correct 7 ms 12076 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 6 ms 12088 KB Output is correct
10 Correct 7 ms 11988 KB Output is correct
11 Correct 7 ms 12080 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 7 ms 12108 KB Output is correct
14 Correct 7 ms 12080 KB Output is correct
15 Correct 7 ms 12068 KB Output is correct
16 Correct 7 ms 11988 KB Output is correct
17 Correct 8 ms 12080 KB Output is correct
18 Correct 9 ms 12116 KB Output is correct
19 Correct 9 ms 11988 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 ms 12116 KB Output is correct
22 Correct 12 ms 12040 KB Output is correct
23 Correct 7 ms 12004 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12116 KB Output is correct
3 Correct 7 ms 12076 KB Output is correct
4 Correct 7 ms 12080 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 7 ms 12080 KB Output is correct
7 Correct 7 ms 12076 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 6 ms 12088 KB Output is correct
10 Correct 7 ms 11988 KB Output is correct
11 Correct 7 ms 12080 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 7 ms 12108 KB Output is correct
14 Correct 7 ms 12080 KB Output is correct
15 Correct 7 ms 12068 KB Output is correct
16 Correct 7 ms 11988 KB Output is correct
17 Correct 8 ms 12080 KB Output is correct
18 Correct 9 ms 12116 KB Output is correct
19 Correct 9 ms 11988 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 ms 12116 KB Output is correct
22 Correct 12 ms 12040 KB Output is correct
23 Correct 7 ms 12004 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 7 ms 11988 KB Output is correct
26 Correct 8 ms 12372 KB Output is correct
27 Correct 9 ms 12348 KB Output is correct
28 Correct 9 ms 12604 KB Output is correct
29 Correct 9 ms 12348 KB Output is correct
30 Correct 9 ms 12220 KB Output is correct
31 Correct 7 ms 12076 KB Output is correct
32 Correct 8 ms 12756 KB Output is correct
33 Correct 7 ms 11988 KB Output is correct
34 Correct 9 ms 12244 KB Output is correct
35 Correct 8 ms 12404 KB Output is correct
36 Correct 18 ms 12244 KB Output is correct
37 Correct 9 ms 12244 KB Output is correct
38 Correct 7 ms 11988 KB Output is correct
39 Correct 10 ms 12348 KB Output is correct
40 Correct 8 ms 12244 KB Output is correct
41 Correct 8 ms 12244 KB Output is correct
42 Correct 9 ms 12372 KB Output is correct
43 Correct 9 ms 13012 KB Output is correct
44 Correct 7 ms 12076 KB Output is correct
45 Correct 8 ms 12348 KB Output is correct
46 Correct 9 ms 12340 KB Output is correct
47 Correct 7 ms 12024 KB Output is correct
48 Correct 8 ms 12244 KB Output is correct
49 Correct 8 ms 12372 KB Output is correct
50 Correct 9 ms 12600 KB Output is correct
51 Correct 8 ms 12244 KB Output is correct
52 Correct 23 ms 12220 KB Output is correct
53 Correct 9 ms 12260 KB Output is correct
54 Correct 10 ms 12304 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12116 KB Output is correct
3 Correct 7 ms 12076 KB Output is correct
4 Correct 7 ms 12080 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 7 ms 12080 KB Output is correct
7 Correct 7 ms 12076 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 6 ms 12088 KB Output is correct
10 Correct 7 ms 11988 KB Output is correct
11 Correct 7 ms 12080 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 7 ms 12108 KB Output is correct
14 Correct 7 ms 12080 KB Output is correct
15 Correct 7 ms 12068 KB Output is correct
16 Correct 7 ms 11988 KB Output is correct
17 Correct 8 ms 12080 KB Output is correct
18 Correct 9 ms 12116 KB Output is correct
19 Correct 9 ms 11988 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 ms 12116 KB Output is correct
22 Correct 12 ms 12040 KB Output is correct
23 Correct 7 ms 12004 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 7 ms 11988 KB Output is correct
26 Correct 84 ms 18576 KB Output is correct
27 Correct 89 ms 18256 KB Output is correct
28 Correct 9 ms 12320 KB Output is correct
29 Correct 7 ms 12004 KB Output is correct
30 Correct 8 ms 12048 KB Output is correct
31 Correct 98 ms 18456 KB Output is correct
32 Correct 8 ms 12244 KB Output is correct
33 Correct 85 ms 41420 KB Output is correct
34 Correct 104 ms 18372 KB Output is correct
35 Correct 8 ms 12220 KB Output is correct
36 Correct 69 ms 21068 KB Output is correct
37 Correct 8 ms 12244 KB Output is correct
38 Correct 9 ms 12244 KB Output is correct
39 Correct 52 ms 18544 KB Output is correct
40 Correct 8 ms 13012 KB Output is correct
41 Correct 70 ms 18128 KB Output is correct
42 Correct 86 ms 25888 KB Output is correct
43 Correct 11 ms 12088 KB Output is correct
44 Correct 102 ms 42360 KB Output is correct
45 Correct 90 ms 31544 KB Output is correct
46 Correct 9 ms 12244 KB Output is correct
47 Correct 17 ms 12244 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 17324 KB Output is correct
2 Correct 69 ms 24388 KB Output is correct
3 Correct 9 ms 12372 KB Output is correct
4 Correct 9 ms 12244 KB Output is correct
5 Correct 7 ms 12088 KB Output is correct
6 Correct 7 ms 12116 KB Output is correct
7 Correct 8 ms 12220 KB Output is correct
8 Correct 100 ms 19728 KB Output is correct
9 Correct 8 ms 12244 KB Output is correct
10 Correct 88 ms 18840 KB Output is correct
11 Correct 7 ms 12080 KB Output is correct
12 Correct 83 ms 18884 KB Output is correct
13 Correct 84 ms 19976 KB Output is correct
14 Correct 80 ms 24116 KB Output is correct
15 Correct 61 ms 18580 KB Output is correct
16 Correct 10 ms 12372 KB Output is correct
17 Correct 7 ms 12116 KB Output is correct
18 Correct 81 ms 23448 KB Output is correct
19 Correct 119 ms 34436 KB Output is correct
20 Correct 9 ms 12244 KB Output is correct
21 Correct 7 ms 12116 KB Output is correct
22 Correct 94 ms 20308 KB Output is correct
23 Correct 8 ms 12220 KB Output is correct
24 Correct 81 ms 19276 KB Output is correct
25 Correct 96 ms 30928 KB Output is correct
26 Correct 8 ms 12372 KB Output is correct
27 Correct 9 ms 12600 KB Output is correct
28 Correct 8 ms 12216 KB Output is correct
29 Correct 8 ms 12228 KB Output is correct
30 Correct 9 ms 12244 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12116 KB Output is correct
3 Correct 7 ms 12076 KB Output is correct
4 Correct 7 ms 12080 KB Output is correct
5 Correct 7 ms 12116 KB Output is correct
6 Correct 7 ms 12080 KB Output is correct
7 Correct 7 ms 12076 KB Output is correct
8 Correct 7 ms 12116 KB Output is correct
9 Correct 6 ms 12088 KB Output is correct
10 Correct 7 ms 11988 KB Output is correct
11 Correct 7 ms 12080 KB Output is correct
12 Correct 7 ms 11988 KB Output is correct
13 Correct 7 ms 12108 KB Output is correct
14 Correct 7 ms 12080 KB Output is correct
15 Correct 7 ms 12068 KB Output is correct
16 Correct 7 ms 11988 KB Output is correct
17 Correct 8 ms 12080 KB Output is correct
18 Correct 9 ms 12116 KB Output is correct
19 Correct 9 ms 11988 KB Output is correct
20 Correct 7 ms 11988 KB Output is correct
21 Correct 7 ms 12116 KB Output is correct
22 Correct 12 ms 12040 KB Output is correct
23 Correct 7 ms 12004 KB Output is correct
24 Correct 7 ms 11988 KB Output is correct
25 Correct 7 ms 11988 KB Output is correct
26 Correct 8 ms 12372 KB Output is correct
27 Correct 9 ms 12348 KB Output is correct
28 Correct 9 ms 12604 KB Output is correct
29 Correct 9 ms 12348 KB Output is correct
30 Correct 9 ms 12220 KB Output is correct
31 Correct 7 ms 12076 KB Output is correct
32 Correct 8 ms 12756 KB Output is correct
33 Correct 7 ms 11988 KB Output is correct
34 Correct 9 ms 12244 KB Output is correct
35 Correct 8 ms 12404 KB Output is correct
36 Correct 18 ms 12244 KB Output is correct
37 Correct 9 ms 12244 KB Output is correct
38 Correct 7 ms 11988 KB Output is correct
39 Correct 10 ms 12348 KB Output is correct
40 Correct 8 ms 12244 KB Output is correct
41 Correct 8 ms 12244 KB Output is correct
42 Correct 9 ms 12372 KB Output is correct
43 Correct 9 ms 13012 KB Output is correct
44 Correct 7 ms 12076 KB Output is correct
45 Correct 8 ms 12348 KB Output is correct
46 Correct 9 ms 12340 KB Output is correct
47 Correct 7 ms 12024 KB Output is correct
48 Correct 8 ms 12244 KB Output is correct
49 Correct 8 ms 12372 KB Output is correct
50 Correct 9 ms 12600 KB Output is correct
51 Correct 8 ms 12244 KB Output is correct
52 Correct 23 ms 12220 KB Output is correct
53 Correct 9 ms 12260 KB Output is correct
54 Correct 10 ms 12304 KB Output is correct
55 Correct 7 ms 11988 KB Output is correct
56 Correct 84 ms 18576 KB Output is correct
57 Correct 89 ms 18256 KB Output is correct
58 Correct 9 ms 12320 KB Output is correct
59 Correct 7 ms 12004 KB Output is correct
60 Correct 8 ms 12048 KB Output is correct
61 Correct 98 ms 18456 KB Output is correct
62 Correct 8 ms 12244 KB Output is correct
63 Correct 85 ms 41420 KB Output is correct
64 Correct 104 ms 18372 KB Output is correct
65 Correct 8 ms 12220 KB Output is correct
66 Correct 69 ms 21068 KB Output is correct
67 Correct 8 ms 12244 KB Output is correct
68 Correct 9 ms 12244 KB Output is correct
69 Correct 52 ms 18544 KB Output is correct
70 Correct 8 ms 13012 KB Output is correct
71 Correct 70 ms 18128 KB Output is correct
72 Correct 86 ms 25888 KB Output is correct
73 Correct 11 ms 12088 KB Output is correct
74 Correct 102 ms 42360 KB Output is correct
75 Correct 90 ms 31544 KB Output is correct
76 Correct 9 ms 12244 KB Output is correct
77 Correct 17 ms 12244 KB Output is correct
78 Correct 53 ms 17324 KB Output is correct
79 Correct 69 ms 24388 KB Output is correct
80 Correct 9 ms 12372 KB Output is correct
81 Correct 9 ms 12244 KB Output is correct
82 Correct 7 ms 12088 KB Output is correct
83 Correct 7 ms 12116 KB Output is correct
84 Correct 8 ms 12220 KB Output is correct
85 Correct 100 ms 19728 KB Output is correct
86 Correct 8 ms 12244 KB Output is correct
87 Correct 88 ms 18840 KB Output is correct
88 Correct 7 ms 12080 KB Output is correct
89 Correct 83 ms 18884 KB Output is correct
90 Correct 84 ms 19976 KB Output is correct
91 Correct 80 ms 24116 KB Output is correct
92 Correct 61 ms 18580 KB Output is correct
93 Correct 10 ms 12372 KB Output is correct
94 Correct 7 ms 12116 KB Output is correct
95 Correct 81 ms 23448 KB Output is correct
96 Correct 119 ms 34436 KB Output is correct
97 Correct 9 ms 12244 KB Output is correct
98 Correct 7 ms 12116 KB Output is correct
99 Correct 94 ms 20308 KB Output is correct
100 Correct 8 ms 12220 KB Output is correct
101 Correct 81 ms 19276 KB Output is correct
102 Correct 96 ms 30928 KB Output is correct
103 Correct 8 ms 12372 KB Output is correct
104 Correct 9 ms 12600 KB Output is correct
105 Correct 8 ms 12216 KB Output is correct
106 Correct 8 ms 12228 KB Output is correct
107 Correct 9 ms 12244 KB Output is correct
108 Correct 593 ms 55096 KB Output is correct
109 Correct 579 ms 102620 KB Output is correct
110 Correct 591 ms 138516 KB Output is correct
111 Correct 645 ms 132452 KB Output is correct
112 Correct 590 ms 97896 KB Output is correct
113 Correct 452 ms 70220 KB Output is correct
114 Correct 482 ms 43704 KB Output is correct
115 Correct 489 ms 43852 KB Output is correct
116 Correct 774 ms 48572 KB Output is correct
117 Correct 582 ms 73312 KB Output is correct
118 Correct 529 ms 45564 KB Output is correct
119 Correct 604 ms 73444 KB Output is correct
120 Correct 624 ms 110540 KB Output is correct
121 Correct 605 ms 73452 KB Output is correct
122 Correct 919 ms 57700 KB Output is correct
123 Correct 413 ms 74896 KB Output is correct
124 Correct 578 ms 64964 KB Output is correct