oj.uz

Submission #522852

# Submission time Handle Problem Language Result Execution time Memory
522852 2022-02-06T05:08:08 Z nathanlee726 Meetings 2 (JOI21_meetings2) C++14
100 / 100
 361 ms 59436 KB 
//#include<i_am_noob_orz>
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
#define ll long long
#define int ll
#define ull unsigned long long
#define pii pair<int,int>
#define X first
#define Y second
#define mod ((ll)1e9+7)
#define pb push_back
#define mp make_pair
#define abs(x) ((x)>0?(x):(-(x)))
#define F(n) Fi(i,n)
#define Fi(i,n) Fl(i,0,n)
#define Fl(i,l,n) for(int i=l;i<n;i++)
#define memres(a) memset(a,0,sizeof(a))
#define all(a) a.begin(),a.end()
#define sz(a) ((int)a.size())
#define ceiling(a,b) (((a)+(b)-1)/(b))
#define endl '\n'
#define bit_count(x) __builtin_popcountll((x))
#define ykh mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define jimmy_is_kind false
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> rbtree;
 
//#define LOCAL
#ifdef LOCAL
#define bug(...) cerr<<"#"<<__LINE__<<' '<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S&&...y) {cerr<<x<<", "; _do(y...);}
#define IOS()
#else
#define IOS() ios_base::sync_with_stdio(0), cin.tie(0)
#define endl '\n'
#define bug(...)
#endif
 
int add(int a,int b){return(a+b>=mod?a+b-mod:a+b);}
int sub(int a,int b){return(a<b?a+mod-b:a-b);}
int po(int a,int b){
	if(b==0)return 1;
	if(b==1)return(a%mod);
	int tem=po(a,b/2);
	if(b&1)return(((tem*tem)%mod)*a)%mod;
	else return(tem*tem)%mod; 
}
int GCD(int a,int b){
	int x=0;
	int ra,rb;
	while(a&&b){
		if(((a&1)==0)&&((b&1)==0)){
			a>>=1,b>>=1,x++;
		}
		else if((a^b)&1){
			if(a&1)b>>=1;
			else a>>=1;
		}
		else{
			ra=abs(a-b),rb=min(a,b);
			a=ra,b=rb;
		}
	}
	return max(a,b)<<x;
}
int gcd(int a,int b){if(b==0)return a;return gcd(b,a%b);}

int n,cn,mn=1e9,si[200010],pa[200010][18],o[200010],dep[200010];
vector<int> g[200010];
vector<pii> v;

void dfs(int p,int f){
	si[p]=1;
	int mxs=0;
	for(int u:g[p]){
		if(u==f)continue;
		dfs(u,p);
		si[p]+=si[u];
		mxs=max(mxs,si[u]);
	}
	mxs=max(mxs,n-1-si[p]);
	bug(p,mxs);
	if(mxs<=mn)mn=mxs,cn=p;
}

void dfs1(int p,int f,int d){
	si[p]=1;
	pa[p][0]=f;
	dep[p]=d;
	for(int u:g[p]){
		if(u==f)continue;
		dfs1(u,p,d+1);
		si[p]+=si[u];
	}
}

int dis(int x,int y){
	if(x==y)return 0;
	if(dep[x]<dep[y])swap(x,y);
	int len=dep[x]-dep[y];
	for(int i=17;i>=0;i--)if(len&(1ll<<i))x=pa[x][i];
	if(x==y)return len;
	for(int i=17;i>=0;i--){
		if(pa[x][i]!=-1&&pa[x][i]!=pa[y][i])len+=(1ll<<(i+1)),x=pa[x][i],y=pa[y][i];
	}
	return len+2;
}

signed main(){
	IOS();
	cin>>n;
	F(n-1){
		int x,y;
		cin>>x>>y;
		--x,--y;
		g[x].pb(y);
		g[y].pb(x);
	}
	if(n==1){
		cout<<"1"<<endl;
		return 0;
	}
	dfs(0,-1);
	dfs1(cn,-1,0);
	bug(cn);
	Fi(j,17)F(n)pa[i][j+1]=(pa[i][j]==-1?-1:pa[pa[i][j]][j]);
	F(n){
		if(i!=cn)v.pb({si[i],i});
	}
	sort(all(v));
	pii dip={cn,cn};
	int di=0;
	for(int i=n-1;i>=0;i--){
		if(i%2==0){
			o[i]=1;
			continue;
		}
		int k=(i+1)/2;
		while(sz(v)&&v.back().X>=k){
			int t1,t2;
			t1=dis(v.back().Y,dip.X);
			t2=dis(v.back().Y,dip.Y);
			if(t1>t2){
				if(t1>di)dip={v.back().Y,dip.X},di=t1; 
			}
			else{
				if(t2>di)dip={v.back().Y,dip.Y},di=t2;
			}
			v.pop_back();
		}
		o[i]=di+1;
	}
	F(n)cout<<o[i]<<endl;
	return 0;
}
/*
14
8 13
13 10
13 7
6 8
5 7
10 4
9 5
12 8
6 2
4 11
5 1
9 3
4 14
*/

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4996 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 5016 KB Output is correct
8 Correct 3 ms 5020 KB Output is correct
9 Correct 4 ms 5080 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 5024 KB Output is correct
15 Correct 3 ms 5024 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5016 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 5020 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4996 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 5016 KB Output is correct
8 Correct 3 ms 5020 KB Output is correct
9 Correct 4 ms 5080 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 5024 KB Output is correct
15 Correct 3 ms 5024 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5016 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 5020 KB Output is correct
22 Correct 6 ms 5956 KB Output is correct
23 Correct 6 ms 5992 KB Output is correct
24 Correct 5 ms 5964 KB Output is correct
25 Correct 6 ms 6008 KB Output is correct
26 Correct 6 ms 5992 KB Output is correct
27 Correct 6 ms 5964 KB Output is correct
28 Correct 6 ms 5932 KB Output is correct
29 Correct 7 ms 5964 KB Output is correct
30 Correct 6 ms 5964 KB Output is correct
31 Correct 6 ms 5964 KB Output is correct
32 Correct 7 ms 6060 KB Output is correct
33 Correct 6 ms 6184 KB Output is correct
34 Correct 5 ms 5932 KB Output is correct
35 Correct 5 ms 5992 KB Output is correct
36 Correct 6 ms 5936 KB Output is correct
37 Correct 5 ms 5964 KB Output is correct
38 Correct 5 ms 6048 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4996 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 5016 KB Output is correct
8 Correct 3 ms 5020 KB Output is correct
9 Correct 4 ms 5080 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5024 KB Output is correct
14 Correct 3 ms 5024 KB Output is correct
15 Correct 3 ms 5024 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 5016 KB Output is correct
20 Correct 3 ms 5024 KB Output is correct
21 Correct 3 ms 5020 KB Output is correct
22 Correct 6 ms 5956 KB Output is correct
23 Correct 6 ms 5992 KB Output is correct
24 Correct 5 ms 5964 KB Output is correct
25 Correct 6 ms 6008 KB Output is correct
26 Correct 6 ms 5992 KB Output is correct
27 Correct 6 ms 5964 KB Output is correct
28 Correct 6 ms 5932 KB Output is correct
29 Correct 7 ms 5964 KB Output is correct
30 Correct 6 ms 5964 KB Output is correct
31 Correct 6 ms 5964 KB Output is correct
32 Correct 7 ms 6060 KB Output is correct
33 Correct 6 ms 6184 KB Output is correct
34 Correct 5 ms 5932 KB Output is correct
35 Correct 5 ms 5992 KB Output is correct
36 Correct 6 ms 5936 KB Output is correct
37 Correct 5 ms 5964 KB Output is correct
38 Correct 5 ms 6048 KB Output is correct
39 Correct 257 ms 50772 KB Output is correct
40 Correct 257 ms 49780 KB Output is correct
41 Correct 316 ms 50736 KB Output is correct
42 Correct 261 ms 51532 KB Output is correct
43 Correct 272 ms 51500 KB Output is correct
44 Correct 259 ms 51556 KB Output is correct
45 Correct 361 ms 56328 KB Output is correct
46 Correct 303 ms 59436 KB Output is correct
47 Correct 210 ms 51596 KB Output is correct
48 Correct 157 ms 51752 KB Output is correct
49 Correct 293 ms 51776 KB Output is correct
50 Correct 180 ms 51808 KB Output is correct
51 Correct 236 ms 58856 KB Output is correct