oj.uz

Submission #336615

# Submission time Handle Problem Language Result Execution time Memory
336615 2020-12-16T02:50:48 Z alishahali1382 Capital City (JOI20_capital_city) C++14
11 / 100
 3000 ms 42624 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod=1000000007;
const int MAXN=200010, LOG=20;

int n, m, k, u, v, x, y, t, a, b, ans=inf, shit;
int C[MAXN], mark2[MAXN], mark3[MAXN], ted[MAXN];
bool dead[MAXN], dead2[MAXN], mark[MAXN];
int par[MAXN], sz[MAXN];
vector<int> G[MAXN], V[MAXN];

int dfs1(int node, int par){
	sz[node]=1;
	for (int v:G[node]) if (v!=par && !dead[v]) sz[node]+=dfs1(v, node);
	return sz[node];
}
int Centroid(int node, int par, int n){
	for (int v:G[node]) if (v!=par && !dead[v] && sz[v]*2>n) return Centroid(v, node, n);
	return node;
}
inline void addc(int c){
	if (mark2[c]==shit) ted[c]++;
	else mark2[c]=shit, ted[c]=1;
}
void dfs2(int node){
	mark[node]=0;
	addc(C[node]);
	for (int v:G[node]) if (v!=par[node] && !dead[v]){
		par[v]=node;
		dfs2(v);
	}
}
void Decompose(int root){
	root=Centroid(root, root, dfs1(root, root));
//	debug(root)
	shit++;
	if (!dead2[C[root]]){
		dead2[C[root]]=1;
		par[root]=0;
		dfs2(root);
		vector<int> vec={C[root]};
		mark3[C[root]]=shit;
		int res=0, bad=0;
		while (vec.size() && !bad){
			int c=vec.back();
			vec.pop_back();
			if (V[c].size()!=ted[c]){
				bad=1;
				break ;
			}
//			debug(c)
			res++;
			for (int v:V[c]){
				while (v && !mark[v]){
					if (mark3[C[v]]!=shit){
						int cc=C[v];
						vec.pb(cc);
						mark3[cc]=shit;
					}
					v=par[v];
				}
				if (bad) break ;
			}
		}
		if (!bad) ans=min(ans, res);
	}
	dead[root]=1;
	for (int v:G[root]) if (!dead[v]) Decompose(v);
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin>>n>>k;
	for (int i=1; i<n; i++){
		cin>>u>>v;
		G[u].pb(v);
		G[v].pb(u);
	}
	for (int i=1; i<=n; i++) cin>>C[i], V[C[i]].pb(i);
	Decompose(1);
	cout<<ans-1<<"\n";
	
	return 0;
}

Compilation message

capital_city.cpp: In function 'void Decompose(int)':
capital_city.cpp:66:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   66 |    if (V[c].size()!=ted[c]){
      |        ~~~~~~~~~~~^~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9964 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9856 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9964 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9856 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct
11 Correct 9 ms 9964 KB Output is correct
12 Correct 9 ms 9964 KB Output is correct
13 Correct 9 ms 9964 KB Output is correct
14 Correct 9 ms 9964 KB Output is correct
15 Correct 9 ms 9964 KB Output is correct
16 Correct 11 ms 9964 KB Output is correct
17 Correct 9 ms 9964 KB Output is correct
18 Correct 9 ms 9964 KB Output is correct
19 Correct 9 ms 9964 KB Output is correct
20 Correct 9 ms 9964 KB Output is correct
21 Correct 9 ms 9964 KB Output is correct
22 Correct 8 ms 10092 KB Output is correct
23 Correct 9 ms 9984 KB Output is correct
24 Correct 10 ms 9964 KB Output is correct
25 Correct 11 ms 10092 KB Output is correct
26 Correct 11 ms 10092 KB Output is correct
27 Correct 11 ms 10092 KB Output is correct
28 Correct 10 ms 9964 KB Output is correct
29 Correct 10 ms 9964 KB Output is correct
30 Correct 10 ms 9964 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 537 ms 41964 KB Output is correct
2 Correct 196 ms 42624 KB Output is correct
3 Correct 529 ms 41836 KB Output is correct
4 Correct 185 ms 42476 KB Output is correct
5 Execution timed out 3088 ms 38684 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9964 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9856 KB Output is correct
4 Correct 7 ms 9836 KB Output is correct
5 Correct 7 ms 9836 KB Output is correct
6 Correct 7 ms 9836 KB Output is correct
7 Correct 7 ms 9836 KB Output is correct
8 Correct 7 ms 9836 KB Output is correct
9 Correct 7 ms 9836 KB Output is correct
10 Correct 7 ms 9836 KB Output is correct
11 Correct 9 ms 9964 KB Output is correct
12 Correct 9 ms 9964 KB Output is correct
13 Correct 9 ms 9964 KB Output is correct
14 Correct 9 ms 9964 KB Output is correct
15 Correct 9 ms 9964 KB Output is correct
16 Correct 11 ms 9964 KB Output is correct
17 Correct 9 ms 9964 KB Output is correct
18 Correct 9 ms 9964 KB Output is correct
19 Correct 9 ms 9964 KB Output is correct
20 Correct 9 ms 9964 KB Output is correct
21 Correct 9 ms 9964 KB Output is correct
22 Correct 8 ms 10092 KB Output is correct
23 Correct 9 ms 9984 KB Output is correct
24 Correct 10 ms 9964 KB Output is correct
25 Correct 11 ms 10092 KB Output is correct
26 Correct 11 ms 10092 KB Output is correct
27 Correct 11 ms 10092 KB Output is correct
28 Correct 10 ms 9964 KB Output is correct
29 Correct 10 ms 9964 KB Output is correct
30 Correct 10 ms 9964 KB Output is correct
31 Correct 537 ms 41964 KB Output is correct
32 Correct 196 ms 42624 KB Output is correct
33 Correct 529 ms 41836 KB Output is correct
34 Correct 185 ms 42476 KB Output is correct
35 Execution timed out 3088 ms 38684 KB Time limit exceeded
36 Halted 0 ms 0 KB -