QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#784702#6660. 택시 여행zhanghuanrui0 44ms23584kbC++143.7kb2024-11-26 15:45:152024-11-26 15:45:33

Judging History

你现在查看的是最新测评结果

  • [2024-11-26 15:45:33]
  • 评测
  • 测评结果:0
  • 用时:44ms
  • 内存:23584kb
  • [2024-11-26 15:45:15]
  • 提交

answer

#include <bits/stdc++.h>
#define double long double
#define int long long
#ifdef zhr_debug
#define debug printf
#else
void debug(const char* s,...){}
#endif
using namespace std;
const int inf=1000000000000000000ll;
void freopen(string file){freopen((file+".in").c_str(),"r",stdin);freopen((file+".out").c_str(),"w",stdout);}
int n;
int a[100020];
int b[100020];
struct edge
{
	int to,val;
	edge(int to=0,int val=0):to(to),val(val){}
};
vector<edge> e[100020];
int fa[100020][20];
int dep[100020];
int dis[100020];
int sz[100020];
bool vis[100020];
void findrt(int x,int f,int all,int &rt)
{
	sz[x]=1;
	int mx=0;
	for(edge v:e[x])
	{
		if(vis[v.to] || v.to==f) continue;
		findrt(v.to,x,all,rt);
		sz[x]+=sz[v.to];
		mx=max(mx,sz[v.to]);
	}
	mx=max(mx,all-sz[x]);
	if(mx<=n/2) rt=x;
}
int top[100020];
void dfs1(int x,int f)
{
	fa[x][0]=f;for(int i=1;i<=17;i++) fa[x][i]=fa[fa[x][i-1]][i-1];
	dep[x]=dep[f]+1;
	for(edge v:e[x])
	{
		if(v.to==f) continue;
		dis[v.to]=dis[x]+v.val;
		dfs1(v.to,x);
	}
}
int getlca(int x,int y)
{
	if(dep[x]<dep[y]) swap(x,y);
	for(int i=17;i>=0;i--) if(dep[fa[x][i]]>=dep[y]) x=fa[x][i];
	if(x==y) return x;
	for(int i=17;i>=0;i--) if(fa[x][i]!=fa[y][i]) x=fa[x][i],y=fa[y][i];
	return fa[x][0];
}
int getdis(int x,int y){return dis[x]+dis[y]-2*dis[getlca(x,y)];}
void dfs2(int x,int f,int all)
{
	findrt(x,0,all,x);
	findrt(x,0,all,x);
	debug("dfs2(%lld)\n",x);
	top[x]=f;
	vis[x]=true;
	for(edge v:e[x])
	{
		if(vis[v.to] || v.to==f) continue;
		dfs2(v.to,x,sz[v.to]);
	}
}
int o[100020];
int dp[100020];
struct node
{
	int x,y;
	node(int x=0,int y=0):x(x),y(y){}
};
double slope(node a,node b){return 1.0L*(a.y-b.y)/(a.x-b.x);}
struct ConvexHull
{
	vector<node> hull;
	void insert(node a)
	{
		if(hull.size() && hull.back().x==a.x)
		{
			a.y=min(a.y,hull.back().y);
			hull.pop_back();
		}
		while(hull.size()>1 && slope(hull[hull.size()-1],hull[hull.size()-2])<=slope(hull[hull.size()-1],a)) hull.pop_back();
		hull.push_back(a);
	}
	int query(int k)
	{
		if(hull.empty()) return inf;
		k=-k;
		static int l,r,mid,res;
		l=1;r=hull.size()-1;res=0;
		while(l<=r)
		{
			mid=(l+r)>>1;
			if(slope(hull[mid],hull[mid-1])>k) res=mid,l=mid+1;
			else r=mid-1;
		}
		return hull[res].y-hull[res].x*k;
	}
};
ConvexHull hull[100020];
void work(int x)
{
	debug("work(%lld)\n",x);
	if(x==1) dp[x]=0;
	else
	{
		dp[x]=inf;
		for(int xx=x;xx;xx=top[xx])
		{
			dp[x]=min(dp[x],hull[xx].query(getdis(x,xx)));
			debug("query : %lld=%lld\n",getdis(x,xx),hull[xx].query(getdis(x,xx)));
		}
	}
	debug("dp[%lld]=%lld\n",x,dp[x]);
	for(int xx=x;xx;xx=top[xx])
	{
		hull[xx].insert(node(b[x],dp[x]+a[x]+b[x]*getdis(x,xx)));
		debug("insert : (%lld,%lld+%lld+%lld*%lld)\n",b[x],dp[x],a[x],b[x],getdis(x,xx));
	}
}
vector<int> travel(vector<int> A,vector<signed> B,vector<signed> U,vector<signed> V,vector<signed> W)
{
	n=A.size();
	for(int i=0;i<n;i++) a[i+1]=A[i];
	for(int i=0;i<n;i++) b[i+1]=B[i];
	for(int i=0;i<n-1;i++)
	{
		e[U[i]+1].push_back(edge(V[i]+1,W[i]));
		e[V[i]+1].push_back(edge(U[i]+1,W[i]));
	}
//	dfs1(1,0);
//	dfs2(1,0,n);
	debug("top : ");for(int i=1;i<=n;i++) debug("%lld ",top[i]);debug("\n");
	debug("dis : ");for(int i=1;i<=n;i++) debug("%lld ",dis[i]);debug("\n");
	for(int i=1;i<=n;i++) o[i]=i;
	sort(o+1,o+n+1,[](int x,int y){return b[x]>b[y];});
//	for(int i=1;i<=n;i++) work(o[i]);
	vector<int> ans;
//	for(int i=2,tmp;i<=n;i++)
//	{
//		tmp=inf;
//		for(int xx=i;xx;xx=top[xx]) tmp=min(tmp,hull[xx].query(getdis(i,xx)));
//		ans.push_back(tmp);
//	}
	return ans;
}
//signed main()
//{
//	vector<int> res=travel({10,5,13,4,3},{10,7,5,9,1},{1,0,3,2},{0,2,2,4},{1,5,10,3});
//	for(int x:res) printf("%lld ",x);
//}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 0
Wrong Answer
time: 0ms
memory: 11288kb

input:

2
684124582850 713748627948
74361 256955
0 1 661088

output:

Length of array should be N-1

result:

wrong answer 1st lines differ - expected: 'secret: XBNN6R0Jnospxlfz11GWxd4ldkzb0I', found: 'Length of array should be N-1'

Subtask #2:

score: 0
Wrong Answer

Test #31:

score: 0
Wrong Answer
time: 44ms
memory: 22944kb

input:

100000
746699125678 374834842799 250803643493 620187038832 454433387570 406226564003 897157438699 99473514061 734784419618 503968957100 363935477037 277126009840 52078020050 990757079812 847235285349 950784717285 271017141367 861087225700 996035427219 520682200664 282013988419 415183977876 882007771...

output:

Length of array should be N-1

result:

wrong answer 1st lines differ - expected: 'secret: XBNN6R0Jnospxlfz11GWxd4ldkzb0I', found: 'Length of array should be N-1'

Subtask #3:

score: 0
Skipped

Dependency #1:

0%

Subtask #4:

score: 0
Wrong Answer

Test #69:

score: 0
Wrong Answer
time: 36ms
memory: 23584kb

input:

100000
15175010 23519365 21177669 27079342 9089 16784452 29693960 23124925 17048604 10179491 12828214 24992902 8483134 2928073 23807522 7332137 17421520 28460746 1607282 13224363 11900728 11794692 11495061 4687109 23460275 7657982 27417256 16978162 7326803 23083826 24942987 16610314 12147303 2828271...

output:

Length of array should be N-1

result:

wrong answer 1st lines differ - expected: 'secret: XBNN6R0Jnospxlfz11GWxd4ldkzb0I', found: 'Length of array should be N-1'

Subtask #5:

score: 0
Wrong Answer

Test #94:

score: 0
Wrong Answer
time: 30ms
memory: 23488kb

input:

99281
551670361798 568902251563 418071776626 697635341894 641578820039 117221079324 812766431051 425410617978 663769685693 282144284527 799662290178 749088952784 586626406385 122473825417 459510657357 871705247919 443707710712 735612808044 237919555727 829939639783 122127143240 616906466299 24431898...

output:

Length of array should be N-1

result:

wrong answer 1st lines differ - expected: 'secret: XBNN6R0Jnospxlfz11GWxd4ldkzb0I', found: 'Length of array should be N-1'

Subtask #6:

score: 0
Skipped

Dependency #1:

0%