oj.uz

Submission #519817

# Submission time Handle Problem Language Result Execution time Memory
519817 2022-01-27T11:21:08 Z new_acc Capital City (JOI20_capital_city) C++14
11 / 100
 3000 ms 407260 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define rep(a, b) for(int a = 0; a < (b); a++)
#pragma GCC optimize("O2")
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef vector<ll> vl;
const int N=2e5+10;
const int L=19;
const int M=4e6+5e5;
vi graf[N],r[N],graf2[M];
int t[N],gl[N],spojna[M],ile[M],pre[N],post[M],kon[M];
pair<int,int> jump[N][L+1];
int l=0,l2=0,n,k;
bitset<M>kan;
bitset<M>vis;
void add(int a,int b){
	graf2[a].push_back(b);
}
void dfs(int v,int o,int g){
	pre[v]=++l2;
	gl[v]=g;
	jump[v][0]={o,++l};
	add(l,t[o-1]);
	for(int j=1;j<=L;j++) jump[v][j].fi=jump[jump[v][j-1].fi][j-1].fi,jump[v][j].se=++l,add(l,jump[v][j-1].se),add(l,jump[jump[v][j-1].fi][j-1].se);
	for(auto u:graf[v]){
		if(u==o) continue;
		dfs(u,v,g+1);
	}
}
int lca(int a,int b){
	if(gl[a]<gl[b]) swap(a,b);
	for(int i=L;i>=0;i--) if(gl[jump[a][i].fi]>=gl[b]) a=jump[a][i].fi;
	if(a==b) return a;
	int res=0;
	for(int i=L;i>=0;i--){
		if(jump[a][i].fi==jump[b][i].fi) res=jump[a][i].fi;
		else a=jump[a][i].fi,b=jump[b][i].fi;
	}
	return res;
}
void dod(int a,int l,int x){
	for(int i=L;i>=0;i--) if(gl[jump[a][i].fi]>=gl[l]) add(x,jump[a][i].se),a=jump[a][i].fi;
}
void dfs2(int v){
	if(vis[v]) return;
	vis[v]=1;
	for(auto u:graf2[v]) dfs2(u);
	post[l2++]=v;
}
void dfs3(int v,int s){
	if(vis[v]) return;
	vis[v]=1;
	spojna[v]=s;
	if(v<=k-1) ile[s]++;
	for(auto u:graf2[v]) dfs3(u,s);
}
void odw(){
	rep(i,l+1) kon[i]=graf2[i].size();
	rep(i,l+1) {
		for(int j=kon[i]-1;j>=0;j--) graf2[graf2[i][j]].push_back(i),swap(graf2[i][j],graf2[i][graf2[i].size()-1]),graf2[i].pop_back();
		graf2[i].shrink_to_fit();
	}
}
void solve(){
	cin>>n>>k;
	rep(i,n-1){
		int a,b;
		cin>>a>>b;
		graf[a].push_back(b),graf[b].push_back(a);
	}
	l=k-1;
	rep(i,n){
		cin>>t[i];
		t[i]--;
		r[t[i]].push_back(i+1);
	}
	dfs(1,1,1);
	vector<pair<int,int> >vv;
	rep(i,k){	
		vv.clear();
		for(auto u:r[i]) vv.push_back({pre[u],u});
		sort(vv.begin(),vv.end());
		for(int j=1;j<vv.size();j++){
			int l=lca(vv[j].se,vv[j-1].se);
			dod(vv[j].se,l,i),dod(vv[j-1].se,l,i);
		}
	}
	l2=0;
	rep(i,l+1) dfs2(i);
	rep(i,l+1) vis[i]=0;
	odw();
	int curr=0;
	for(int i=l;i>=0;i--) if(!vis[post[i]]) dfs3(post[i],++curr);
	rep(i,l+1){
		bool b=0;
		for(auto u:graf2[i]) if(spojna[i]!=spojna[u]) kan[spojna[u]]=1;
	}
	int res=INT_MAX;
	rep(i,l+1) if(!kan[spojna[i]]) res=min(res,ile[spojna[i]]);
	cout<<res-1<<"\n";
}
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0);
	solve();
}

Compilation message

capital_city.cpp: In function 'void solve()':
capital_city.cpp:86:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |   for(int j=1;j<vv.size();j++){
      |               ~^~~~~~~~~~
capital_city.cpp:98:8: warning: unused variable 'b' [-Wunused-variable]
   98 |   bool b=0;
      |        ^

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 115472 KB Output is correct
2 Correct 56 ms 115372 KB Output is correct
3 Correct 54 ms 115424 KB Output is correct
4 Correct 53 ms 115468 KB Output is correct
5 Correct 54 ms 115368 KB Output is correct
6 Correct 56 ms 115428 KB Output is correct
7 Correct 58 ms 115456 KB Output is correct
8 Correct 53 ms 115460 KB Output is correct
9 Correct 52 ms 115524 KB Output is correct
10 Correct 55 ms 115432 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 115472 KB Output is correct
2 Correct 56 ms 115372 KB Output is correct
3 Correct 54 ms 115424 KB Output is correct
4 Correct 53 ms 115468 KB Output is correct
5 Correct 54 ms 115368 KB Output is correct
6 Correct 56 ms 115428 KB Output is correct
7 Correct 58 ms 115456 KB Output is correct
8 Correct 53 ms 115460 KB Output is correct
9 Correct 52 ms 115524 KB Output is correct
10 Correct 55 ms 115432 KB Output is correct
11 Correct 63 ms 118348 KB Output is correct
12 Correct 69 ms 118548 KB Output is correct
13 Correct 76 ms 118484 KB Output is correct
14 Correct 63 ms 118384 KB Output is correct
15 Correct 63 ms 118140 KB Output is correct
16 Correct 67 ms 118132 KB Output is correct
17 Correct 71 ms 118240 KB Output is correct
18 Correct 69 ms 118080 KB Output is correct
19 Correct 75 ms 118236 KB Output is correct
20 Correct 66 ms 118016 KB Output is correct
21 Correct 64 ms 118020 KB Output is correct
22 Correct 64 ms 118132 KB Output is correct
23 Correct 63 ms 119208 KB Output is correct
24 Correct 62 ms 117928 KB Output is correct
25 Correct 64 ms 118036 KB Output is correct
26 Correct 80 ms 117988 KB Output is correct
27 Correct 68 ms 118068 KB Output is correct
28 Correct 73 ms 118064 KB Output is correct
29 Correct 65 ms 118012 KB Output is correct
30 Correct 80 ms 118160 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3070 ms 407260 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 115472 KB Output is correct
2 Correct 56 ms 115372 KB Output is correct
3 Correct 54 ms 115424 KB Output is correct
4 Correct 53 ms 115468 KB Output is correct
5 Correct 54 ms 115368 KB Output is correct
6 Correct 56 ms 115428 KB Output is correct
7 Correct 58 ms 115456 KB Output is correct
8 Correct 53 ms 115460 KB Output is correct
9 Correct 52 ms 115524 KB Output is correct
10 Correct 55 ms 115432 KB Output is correct
11 Correct 63 ms 118348 KB Output is correct
12 Correct 69 ms 118548 KB Output is correct
13 Correct 76 ms 118484 KB Output is correct
14 Correct 63 ms 118384 KB Output is correct
15 Correct 63 ms 118140 KB Output is correct
16 Correct 67 ms 118132 KB Output is correct
17 Correct 71 ms 118240 KB Output is correct
18 Correct 69 ms 118080 KB Output is correct
19 Correct 75 ms 118236 KB Output is correct
20 Correct 66 ms 118016 KB Output is correct
21 Correct 64 ms 118020 KB Output is correct
22 Correct 64 ms 118132 KB Output is correct
23 Correct 63 ms 119208 KB Output is correct
24 Correct 62 ms 117928 KB Output is correct
25 Correct 64 ms 118036 KB Output is correct
26 Correct 80 ms 117988 KB Output is correct
27 Correct 68 ms 118068 KB Output is correct
28 Correct 73 ms 118064 KB Output is correct
29 Correct 65 ms 118012 KB Output is correct
30 Correct 80 ms 118160 KB Output is correct
31 Execution timed out 3070 ms 407260 KB Time limit exceeded
32 Halted 0 ms 0 KB -