QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#431468 | #7419. Jiry Matchings | fzj2007 | WA | 5ms | 24520kb | C++14 | 3.8kb | 2024-06-05 17:00:53 | 2024-06-05 17:00:53 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
template<typename T>inline void read(T &x){
x=0;
bool flag=0;
char ch=getchar();
while(ch<'0'||ch>'9') flag=flag||(ch=='-'),ch=getchar();
while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar();
x=flag?-x:x;
}
template<typename T,typename ...Args>inline void read(T &x,Args &...args){
read(x),read(args...);
}
template<typename T>inline void prt(T x){
if(x>9) prt(x/10);
putchar(x%10+'0');
}
template<typename T>inline void put(T x){
if(x<0) putchar('-'),x=-x;
prt(x);
}
template<typename T>inline void put(char ch,T x){
put(x),putchar(ch);
}
template<typename T,typename ...Args>inline void put(char ch,T x,Args ...args){
put(ch,x),put(ch,args...);
}
#define ll long long
#define inf 0x3f3f3f3f3f3f3f3f
#define N 200005
#define convex vector<ll>
#define matrix array<array<convex,2>,2>
inline convex minkowski(const convex &a,const convex &b){
if(!a.size()||!b.size()) return convex();
convex c(a.size()+b.size()-1);
c[0]=a[0]+b[0];
int i=1,j=1,k=1;
while(i<a.size()&&j<b.size())
if(a[i]-a[i-1]<b[j]-b[j-1]) c[k++]=a[i]-a[i-1],i++;
else c[k++]=b[j]-b[j-1],j++;
while(i<a.size()) c[k++]=a[i]-a[i-1],i++;
while(j<b.size()) c[k++]=b[j]-b[j-1],j++;
for(int i=1;i<c.size();i++) c[i]+=c[i-1];
return c;
}
inline convex operator+(convex a,const ll &b){
convex c(a.size()+1);
for(int i=0;i<a.size();i++) c[i+1]=a[i]+b;
c[0]=-inf;
return c;
}
inline convex max(const convex &a,const convex &b){
convex c(max(a.size(),b.size()));
for(int i=0;i<max(a.size(),b.size());i++){
c[i]=-inf;
if(i<a.size()) c[i]=max(c[i],a[i]);
if(i<b.size()) c[i]=max(c[i],b[i]);
}
return c;
}
int dis[N],st[N];
convex f[N][2];
inline matrix merge1(int l,int r){
matrix res;
if(l==r){
res[0][1]=res[1][0]=f[st[l]][0],res[1][1]=max(f[st[l]][0],f[st[l]][1]);
return res;
}
int mid=l+r>>1;
matrix L=merge1(l,mid),R=merge1(mid+1,r);
for(int a=0;a<2;a++)
for(int b=0;b<2;b++)
res[a][b]=max(minkowski(L[a][0],R[0][b])+dis[mid],minkowski(L[a][1],R[1][b]));
res[1][0]=max(res[1][0],res[0][0]);
res[0][1]=max(res[0][1],res[0][0]);
res[1][1]=max(max(res[0][1],res[1][0]),res[1][1]);
return res;
}
inline matrix merge2(int l,int r){
matrix res;
if(l==r){
res[0][0]=f[st[l]][0],res[0][1]=f[st[l]][1];
return res;
}
int mid=l+r>>1;
matrix L=merge2(l,mid),R=merge2(mid+1,r);
res[0][0]=minkowski(L[0][0],R[0][0]);
res[0][1]=max(minkowski(L[0][1],R[0][0]),minkowski(L[0][0],R[0][1]));
return res;
}
int n,fa[N],siz[N],son[N],vson[N],dep[N],dfn[N],top[N],idx;
vector<pair<int,int>> e[N];
inline void dfs1(int x,int fat){
fa[x]=fat,siz[x]=1,dep[x]=dep[fat]+1;
for(auto tmp:e[x]){
int v=tmp.first;
if(v==fat) continue;
dfs1(v,x),siz[x]+=siz[v];
if(siz[v]>siz[son[x]]) son[x]=v,vson[x]=tmp.second;
}
}
inline void dfs2(int x,int tf){
top[x]=tf,dfn[x]=++idx;
if(son[x]) dfs2(son[x],tf);
for(auto tmp:e[x])
if(tmp.first!=fa[x]&&tmp.first!=son[x]) dfs2(tmp.first,tmp.first);
if(x!=tf) return;
for(int p=x;p;p=son[p]){
int tp=0;
for(auto tmp:e[p]){
int v=tmp.first,w=tmp.second;
if(v==fa[p]||v==son[p]) continue;
st[++tp]=v;
convex f0=f[v][0],f1=f[v][1];
f[v][0]=max(f0,f1),f[v][1]=f0+w;
}
if(!tp) f[p][0]=f[p][1]={0};
else{
matrix res=merge2(1,tp);
f[p][0]=res[0][0],f[p][1]=res[0][1];
}
}
int tp=0;
for(int p=x;p;p=son[p]) st[++tp]=p,dis[tp]=vson[p];
matrix res=merge1(1,tp);
f[x][0]=max(res[0][0],res[0][1]),f[x][1]=max(res[1][0],res[1][1]);
}
int main(){
read(n);
for(int i=1,u,v,w;i<n;i++)
read(u,v,w),e[u].emplace_back(v,w),e[v].emplace_back(u,w);
dfs1(1,0),dfs2(1,1);
convex res=max(f[1][0],f[1][1]);
for(int i=1;i<n;i++){
if(i<res.size()) put(' ',res[i]);
else putchar('?'),putchar(' ');
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 3ms
memory: 24520kb
input:
5 1 2 3 2 3 5 2 4 4 3 5 2
output:
5 6 ? ?
result:
ok single line: '5 6 ? ? '
Test #2:
score: 0
Accepted
time: 0ms
memory: 21016kb
input:
10 2 8 -5 5 10 5 3 4 -5 1 6 5 3 9 5 1 7 -3 4 8 -5 10 8 -5 1 8 -3
output:
5 10 15 10 ? ? ? ? ?
result:
ok single line: '5 10 15 10 ? ? ? ? ? '
Test #3:
score: 0
Accepted
time: 0ms
memory: 22128kb
input:
2 1 2 35
output:
35
result:
ok single line: '35 '
Test #4:
score: -100
Wrong Answer
time: 5ms
memory: 21076kb
input:
100 75 98 770328247 87 98 -219729992 98 35 578758971 98 93 -348642106 63 98 -638036803 83 25 -744163505 21 98 810313834 97 25 131957988 19 98 -711567435 8 25 68874404 43 98 184473508 28 94 171940607 92 28 971759198 51 98 -674532123 28 6 797727320 98 95 1154600 98 58 683765502 28 12 358426364 4 42 65...
output:
918736686 1578348300 2539832327 3530293771 4484694703 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
result:
wrong answer 1st lines differ - expected: '990461444 1951945471 290634640...? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?', found: '918736686 1578348300 253983232... ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? '