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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#357430#3047. Wind of ChangeHarry27182WA 3411ms196660kbC++143.1kb2024-03-18 21:11:482024-03-18 21:11:48

Judging History

你现在查看的是最新测评结果

  • [2024-03-18 21:11:48]
  • 评测
  • 测评结果:WA
  • 用时:3411ms
  • 内存:196660kb
  • [2024-03-18 21:11:48]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,u,v,w,ans[250005],dis[105][250005];vector<int>now;
struct Tree
{
	struct edge{int v,w,nxt;}e[500005];
	int cnt,h[250005],siz[250005],mx[250005],rt,S,p[250005];
	int dep[250005],f[250005][20],vis[250005];vector<int>g[250005];
	void add(int u,int v,int w){e[++cnt]={v,w,h[u]};h[u]=cnt;}
	void find(int u,int fa)
	{
		siz[u]=1;mx[u]=0;
		for(int i=h[u];i;i=e[i].nxt)
		{
			int v=e[i].v;
			if(v==fa||vis[v])continue;
			find(v,u);siz[u]+=siz[v];mx[u]=max(mx[u],siz[v]);
		}
		mx[u]=max(mx[u],S-siz[u]);
		if(mx[u]<mx[rt])rt=u;
	}
	int get(int u,int fa)
	{
		int res=1;
		for(int i=h[u];i;i=e[i].nxt)
		{
			int v=e[i].v;
			if(v==fa||vis[v])continue;
			res+=get(v,u);
		}
		return res;
	}
	void solve(int u)
	{
		vis[u]=1;
		for(int i=h[u];i;i=e[i].nxt)
		{
			int v=e[i].v;
			if(vis[v])continue;
			mx[rt=0]=0x3f3f3f3f;S=get(v,u);find(v,u);
			p[rt]=u;g[u].emplace_back(rt);solve(rt);
		}
	}
	void main()
	{
		mx[rt=0]=0x3f3f3f3f;S=n;find(1,0);solve(rt);
	}
	void dfs(int u)
	{
		now.emplace_back(u);
		for(int i=0;i<g[u].size();i++)dfs(g[u][i]);
	}
	void init(int u,int fa)
	{
		f[u][0]=fa;
		for(int i=1;(1<<i)<=n;i++)f[u][i]=f[f[u][i-1]][i-1];
		for(int i=h[u];i;i=e[i].nxt)
		{
			int v=e[i].v;
			if(v==fa)continue;
			dep[v]=dep[u]+e[i].w;init(v,u);
		}
	}
	int lca(int u,int v)
	{
		if(dep[u]<dep[v])swap(u,v);
		for(int i=18;i>=0;i--)if(dep[f[u][i]]>=dep[v])u=f[u][i];
		if(u==v)return u;
		for(int i=18;i>=0;i--)if(f[u][i]!=f[v][i])u=f[u][i],v=f[v][i];
		return f[u][0];
	}
	int dis(int u,int v){return dep[u]+dep[v]-2*dep[lca(u,v)];}
}T1,T2;
struct node{int w,x;}mn[250005][2];
bool operator ==(node x,node y){return x.w==y.w&&x.x==y.x;}
bool operator <(node x,node y){return x.w<y.w;}
signed main()
{
	cin.tie(0)->sync_with_stdio(0);
	cin>>n;
	for(int i=1;i<n;i++)
	{
		cin>>u>>v>>w;
		T1.add(u,v,w);T1.add(v,u,w);
	}
	for(int i=1;i<n;i++)
	{
		cin>>u>>v>>w;
		T2.add(u,v,w);T2.add(v,u,w);
	}
	T1.init(1,0);T2.init(1,0); 
	T1.main();T2.main();
	for(int i=1;i<=n;i++)mn[i][0]=mn[i][1]={0x3f3f3f3f3f3f3f3f,0},ans[i]=0x3f3f3f3f3f3f3f3f;
	for(int u=1;u<=n;u++)
	{
		for(int x=u,o=0;x;x=T2.p[x],o++)dis[o][u]=T2.dis(u,x);
	}
	for(int i=1;i<=n;i++)
	{
		now.clear();now.shrink_to_fit();
		T1.dfs(i);
		for(int j=0;j<now.size();j++)
		{
			int x=now[j],d1=T1.dis(x,i);
			for(int k=x,o=0;k;k=T2.p[k],o++)
			{
				node now={d1+dis[o][x],x};
				if(now<mn[k][0])mn[k][1]=mn[k][0],mn[k][0]=now;
				else if(now<mn[k][1])mn[k][1]=now;
			}
		}
		for(int j=0;j<now.size();j++)
		{
			int x=now[j],d1=T1.dis(x,i);
			for(int k=x,o=0;k;k=T2.p[k],o++)
			{
				node now={d1+dis[o][x],x};
				if(mn[k][0]==now)ans[x]=min(ans[x],mn[k][1].w+now.w),ans[mn[k][1].x]=min(ans[mn[k][1].x],mn[k][1].w+now.w);
				else ans[x]=min(ans[x],mn[k][0].w+now.w),ans[mn[k][0].x]=min(ans[mn[k][0].x],mn[k][0].w+now.w);
			}
		}
		for(int j=0;j<now.size();j++)
		{
			int x=now[j];
			for(int k=x;k;k=T2.p[k])mn[k][0]=mn[k][1]={0x3f3f3f3f3f3f3f3f,0};
		}
	}
	for(int i=1;i<=n;i++)cout<<ans[i]<<'\n';
	return 0;
}

詳細信息

Test #1:

score: 0
Wrong Answer
time: 3411ms
memory: 196660kb

input:

250000
137466 116241 624409157
188961 163586 148491970
13958 122239 46409636
186120 44010 919858866
72320 102560 92679302
158544 236582 882613876
22331 114267 646741536
210782 42861 679450428
56693 45397 898958944
71188 114724 904191407
15203 225401 210626781
31071 144225 278121829
110354 83972 4557...

output:

41101981722
33898052757
17386222407
47190371137
31165890951
23032562047
36469313934
10929203519
9150749133
49915742961
30769535878
26129987591
35182629851
17070234497
30945920063
24201049200
22946884015
21178918565
24113819218
39824179894
25295838334
22901166222
18834316224
30203983119
42411806191
2...

result:

wrong answer 2nd lines differ - expected: '24783524958', found: '33898052757'