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답안 #386399

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
386399 2021-04-06T13:57:16 Z haojiandan Meetings 2 (JOI21_meetings2) C++14
100 / 100
 705 ms 38508 KB 
#include <bits/stdc++.h>
using namespace std;
template <typename T> void read(T &t) {
	t=0; char ch=getchar(); int f=1;
	while (ch<'0'||ch>'9') { if (ch=='-') f=-1; ch=getchar(); }
	do { (t*=10)+=ch-'0'; ch=getchar(); } while ('0'<=ch&&ch<='9'); t*=f;
}
const int maxn=(2e5)+10;
int n,S,head[maxn],to[maxn*2],tot,nxt[maxn*2];
void add(int x,int y) {
	tot++; nxt[tot]=head[x]; head[x]=tot; to[tot]=y;
}
int ans[maxn],N,vis[maxn];
void update(int &x,int y) {
	if (x<y) x=y;
}
int sz[maxn],mxsz[maxn],rt;

void getrt(int u,int p) {
	sz[u]=1,mxsz[u]=0;
	for (int i=head[u],v;i;i=nxt[i]) {
		v=to[i];
		if (v==p||vis[v]) continue;
		getrt(v,u);
		sz[u]+=sz[v];
		mxsz[u]=max(mxsz[u],sz[v]);
	}
	//if (u%1000==0) printf("%d %d %d\n",u,sz[u],rt);
	mxsz[u]=max(mxsz[u],N-sz[u]);
	if (rt==-1||mxsz[u]<mxsz[rt]) rt=u;
	
}
int dep[maxn],st[maxn],st2[maxn],tot2,bel[maxn],now;
vector<int> g[maxn];
void TRY(int u,int p,int flag) {
	N++;
	if (flag) {
		dep[u]=dep[p]+1; st[++tot]=u; sz[u]=1;
		bel[u]=now;
	}
	for (int i=head[u],v;i;i=nxt[i]) {
		v=to[i];
		if (v==p||vis[v]) continue;
		TRY(v,u,flag); if (flag) sz[u]+=sz[v];
	}
	if (flag) g[sz[u]].push_back(u);
}
bool cmp(int x,int y) { return sz[x]>sz[y]; }
int mxdep[maxn];
pair<int,int> MX,MX2,tmp;
vector<int> rem[maxn];
int deg[maxn];
void solve(int u,int NN) {
	vis[u]=1;
	tot=tot2=0;
	now=0;
	MX=MX2=make_pair(-1,-1);
	//printf("rt=%d %d\n",u,N);
	//if (N!=n) exit(0);
	int all=NN;
	tot2=0;
	for (int i=0;i<=all;i++) g[i].clear();
	rem[u].resize(deg[u]+1);
	for (int i=head[u],v;i;i=nxt[i]) {
		v=to[i]; if (vis[v]) continue;
		N=0; tot=0;
		dep[u]=1;
		now++;
		TRY(v,u,1);
		rem[u][now]=N;
		for (int j=1;j<=tot;j++)
			update(ans[min(sz[st[j]],all-N)],dep[st[j]]);
		//printf("? %d %d\n",all,N);
		mxdep[now]=0;
		tmp=make_pair(0,now);
		if (tmp>MX) MX2=MX,MX=tmp;
		else MX2=max(MX2,tmp);
	}
	//for (int i=1;i<=n/2;i++) printf("%d ",ans[i]); puts("");
	if (now>1) {
		for (int i=all,a;i>=0;i--) if (g[i].size()) {
			for (int v : g[i]) {
					a=bel[v];
			//	if (rt==2) printf("%d %d %d\n",v,dep[v],a);
				if (dep[v]>mxdep[a]) {
					tmp=make_pair(dep[v],a);
					if (MX==make_pair(mxdep[a],a)) MX=tmp;
					else if (MX2==make_pair(mxdep[a],a)) {
						if (tmp<MX) MX2=tmp;
						else MX2=MX,MX=tmp;
					} else if (tmp>MX) MX2=MX,MX=tmp;
					else MX2=max(MX2,tmp);
					mxdep[a]=dep[v];
					if (MX.second!=a) update(ans[sz[v]],dep[v]+MX.first-1);
					else update(ans[sz[v]],dep[v]+MX2.first-1);
					//if (v==8) printf("?? %d %d %d %d\n",MX.first,MX.second,MX2.first,MX2.second);
				}
			}
		}
	}
	//for (int i=1;i<=n/2;i++) printf("%d ",ans[i]); puts("");
	//exit(0);
	for (int i=head[u],v;i;i=nxt[i]) {
		v=to[i]; if (vis[v]) continue;
		N=rem[u][bel[v]];
		rt=-1; getrt(v,u);
		solve(rt,N);
	}
}

int main() {
	//freopen("1.txt","r",stdin);
	read(n); int x,y;
	for (int i=1;i<n;i++) {
		read(x),read(y);
		add(x,y),add(y,x);
		deg[x]++,deg[y]++;
	}
	for (int i=1;i<=n;i++) ans[i]=1;
	N=n,rt=-1;
	getrt(1,0);
	//solve(8);
	//exit(0);
	solve(rt,n);
	for (int i=n;i>=1;i--) ans[i]=max(ans[i+1],ans[i]);
	for (int i=1;i<=n;i++) {
		if (i&1) puts("1");
		else printf("%d\n",ans[i/2]);
	}
	return 0;
}
/*
  0. Enough array size? Enough array size? Enough array size? Integer overflow?
  
  1. Think TWICE, Code ONCE!
  Are there any counterexamples to your algo?
    
  2. Be careful about the BOUNDARIES!
  N=1? P=1? Something about 0?
    
  3. Do not make STUPID MISTAKES!
  Time complexity? Memory usage? Precision error?
*/

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 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 8 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 7 ms 9836 KB Output is correct
12 Correct 6 ms 9836 KB Output is correct
13 Correct 7 ms 9836 KB Output is correct
14 Correct 7 ms 9836 KB Output is correct
15 Correct 7 ms 9836 KB Output is correct
16 Correct 7 ms 9836 KB Output is correct
17 Correct 7 ms 9836 KB Output is correct
18 Correct 7 ms 9836 KB Output is correct
19 Correct 9 ms 9836 KB Output is correct
20 Correct 8 ms 9836 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 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 8 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 7 ms 9836 KB Output is correct
12 Correct 6 ms 9836 KB Output is correct
13 Correct 7 ms 9836 KB Output is correct
14 Correct 7 ms 9836 KB Output is correct
15 Correct 7 ms 9836 KB Output is correct
16 Correct 7 ms 9836 KB Output is correct
17 Correct 7 ms 9836 KB Output is correct
18 Correct 7 ms 9836 KB Output is correct
19 Correct 9 ms 9836 KB Output is correct
20 Correct 8 ms 9836 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 10 ms 10092 KB Output is correct
23 Correct 10 ms 10092 KB Output is correct
24 Correct 10 ms 10108 KB Output is correct
25 Correct 10 ms 10092 KB Output is correct
26 Correct 12 ms 10092 KB Output is correct
27 Correct 12 ms 10092 KB Output is correct
28 Correct 10 ms 10112 KB Output is correct
29 Correct 10 ms 10092 KB Output is correct
30 Correct 13 ms 10092 KB Output is correct
31 Correct 10 ms 10092 KB Output is correct
32 Correct 11 ms 10348 KB Output is correct
33 Correct 11 ms 10348 KB Output is correct
34 Correct 9 ms 10092 KB Output is correct
35 Correct 8 ms 10092 KB Output is correct
36 Correct 11 ms 10092 KB Output is correct
37 Correct 9 ms 10220 KB Output is correct
38 Correct 10 ms 10220 KB Output is correct

Subtask #3
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 7 ms 9836 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 8 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 7 ms 9836 KB Output is correct
12 Correct 6 ms 9836 KB Output is correct
13 Correct 7 ms 9836 KB Output is correct
14 Correct 7 ms 9836 KB Output is correct
15 Correct 7 ms 9836 KB Output is correct
16 Correct 7 ms 9836 KB Output is correct
17 Correct 7 ms 9836 KB Output is correct
18 Correct 7 ms 9836 KB Output is correct
19 Correct 9 ms 9836 KB Output is correct
20 Correct 8 ms 9836 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 10 ms 10092 KB Output is correct
23 Correct 10 ms 10092 KB Output is correct
24 Correct 10 ms 10108 KB Output is correct
25 Correct 10 ms 10092 KB Output is correct
26 Correct 12 ms 10092 KB Output is correct
27 Correct 12 ms 10092 KB Output is correct
28 Correct 10 ms 10112 KB Output is correct
29 Correct 10 ms 10092 KB Output is correct
30 Correct 13 ms 10092 KB Output is correct
31 Correct 10 ms 10092 KB Output is correct
32 Correct 11 ms 10348 KB Output is correct
33 Correct 11 ms 10348 KB Output is correct
34 Correct 9 ms 10092 KB Output is correct
35 Correct 8 ms 10092 KB Output is correct
36 Correct 11 ms 10092 KB Output is correct
37 Correct 9 ms 10220 KB Output is correct
38 Correct 10 ms 10220 KB Output is correct
39 Correct 496 ms 26920 KB Output is correct
40 Correct 471 ms 26532 KB Output is correct
41 Correct 517 ms 26852 KB Output is correct
42 Correct 483 ms 27236 KB Output is correct
43 Correct 495 ms 27236 KB Output is correct
44 Correct 503 ms 27112 KB Output is correct
45 Correct 705 ms 34264 KB Output is correct
46 Correct 554 ms 38508 KB Output is correct
47 Correct 200 ms 27616 KB Output is correct
48 Correct 139 ms 28128 KB Output is correct
49 Correct 416 ms 27824 KB Output is correct
50 Correct 195 ms 28104 KB Output is correct
51 Correct 373 ms 36720 KB Output is correct