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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#883521 | #10040. Taxi | lgvc# | WA | 173ms | 23000kb | C++23 | 3.4kb | 2025-02-05 16:44:32 | 2025-02-05 16:45:01 |
Judging History
answer
#include <bits/stdc++.h>
#define LL long long
#define INF_LL 0x3f3f3f3f3f3f3f3f
int N,hd[100009],to[200009],nxt[200009],val[200009],k,siz[100009],son[100009],
dfn[100009],top[100009],pa[100009],pa2[100009],kk,v[100009],dep2[100009];
LL dep[100009],xx,yy;
void dfs(int n,int f) {
siz[n]=1;
pa2[n]=f;
pa[n]=f;
dep2[n]=dep2[f]+1;
for(int i=hd[n];i;i=nxt[i]) {
if(to[i]==f) continue;
dep[to[i]]=dep[n]+val[i];
dfs(to[i],n);
siz[n]+=siz[to[i]];
if(siz[son[n]]<siz[to[i]]) son[n]=to[i];
}
}
void dfs2(int n,int tp) {
top[n]=tp;
if(!son[n]) return;
dfs2(son[n],tp);
for(int i=hd[n];i;i=nxt[i]) {
if(to[i]==pa2[n]||to[i]==son[n]) continue;
dfs2(to[i],to[i]);
}
}
void l(int u,int v,int w) {
to[++k]=v;nxt[k]=hd[u];val[k]=w;hd[u]=k;
}
inline LL dis(int x,int y) {
LL as=dep[x]+dep[y];
while(top[x]!=top[y]) {
if(dep2[top[x]]<dep2[top[y]]) std::swap(x,y);
x=pa2[top[x]];
}
if(dep2[x]<dep2[y]) std::swap(x,y);
return as-2*dep[y];
}
struct n_t{
LL a;int b,i;
} f[100009];
std::vector<n_t> tp[100009];
bool cmp(n_t x,n_t y) {
return x.b>y.b;
}
void up(int n,LL v,int sl) {
int x=n;
while(n) {
LL vv=v+1ll*sl*dis(x,n);
while(tp[n].size()>=1) {
int sz=tp[n].size();
if(tp[n][sz-1].b==sl&&tp[n][sz-1].a<vv) {
return;
}
if(tp[n][sz-1].b==sl&&tp[n][sz-1].a>=vv) {
tp[n].pop_back();
continue;
}
if(sz<2) break;
if((tp[n][sz-2].a-tp[n][sz-1].a)*(tp[n][sz-1].b-sl)>
(tp[n][sz-1].a-vv)*(tp[n][sz-2].b-tp[n][sz-1].b)) {
break;
}
tp[n].pop_back();
}
tp[n].push_back((n_t){vv,sl,0});
n=pa[n];
}
}
LL qr(int n) {
int x=n;
LL ans=xx+dep[n]*yy;
while(n) {
if(tp[n].size()) {
LL va=dis(x,n);
int l=0,r=tp[n].size()-1,md;
while(l<r) {
md=(l+r)/2;
if((tp[n][md].a-tp[n][md+1].a)>-va*(tp[n][md].b-tp[n][md+1].b)) {
l=md+1;
} else {
r=md;
}
}
ans=std::min(ans,tp[n][l].a+tp[n][l].b*va);
}
n=pa[n];
}
return ans;
}
void cl(int n,int f) {
siz[n]=1;son[n]=0;
for(int i=hd[n];i;i=nxt[i]) {
if(to[i]==f||v[to[i]]) continue;
cl(to[i],n);
siz[n]+=siz[to[i]];
if(siz[son[n]]<siz[to[i]]) son[n]=to[i];
}
}
void sv(int n,int ff) {
cl(n,0);
int x=n;
while(son[x]&&siz[son[x]]>=(siz[n]+1)/2) {
x=son[x];
}
n=x;
pa[n]=ff;
v[n]=1;
for(int i=hd[n];i;i=nxt[i]) {
if(!v[to[i]]) sv(to[i],n);
}
}
signed main(void) {
scanf("%d",&N);
for(int i=1;i<=N;i++) {
scanf("%lld",&f[i].a);
}
for(int i=1;i<=N;i++) {
scanf("%d",&f[i].b);
f[i].i=i;
}
xx=f[1].a;yy=f[1].b;
for(int i=1;i<N;i++) {
int u,v,w;
scanf("%d %d %d",&u,&v,&w);
l(u,v,w),l(v,u,w);
}
dfs(1,0);
dfs2(1,1);
sv(1,0);
std::sort(f+1,f+N+1,cmp);
for(int i=1;i<=N;i++) {
up(f[i].i,qr(f[i].i)+f[i].a,f[i].b);
}
for(int i=2;i<=N;i++) printf("%lld ",qr(i));
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 10080kb
input:
3 0 1 2 8 4 4 1 2 1 1 3 7
output:
8 41
result:
ok 2 number(s): "8 41"
Test #2:
score: 0
Accepted
time: 0ms
memory: 10084kb
input:
2 353 313 928248 475634 2 1 898027
output:
833591767049
result:
ok 1 number(s): "833591767049"
Test #3:
score: 0
Accepted
time: 0ms
memory: 9956kb
input:
8 24 33 35 37 7 18 44 22 10 10 8 5 2 10 1 8 4 8 5 2 8 4 3 1 3 8 1 2 8 6 5 7 2 3 5 8 3
output:
84 54 94 74 94 101 44
result:
ok 7 numbers
Test #4:
score: -100
Wrong Answer
time: 173ms
memory: 23000kb
input:
70000 4143803 235079 3104014 1324928 817104 4389177 1003681 70761 3892615 3597920 2342949 1233648 113802 1035288 657102 3005375 3502514 3873335 2951413 1689927 3076977 2125807 4040868 3145202 2971761 617952 3798745 3121839 2249402 3007573 766828 4128210 4559210 2176972 1598850 3221715 355381 3869924...
output:
8476260963145 2545130433939 3273492088788 7745804674429 43509508846183 2313225494349 9546773699491 2686052100537 6363906619376 3466495616298 7046548725570 3202850592135 1420667518950 2769397798952 12451744596575 2360145250829 7757665644520 9239032373911 35472558553756 7442439581870 2774846467496 378...
result:
wrong answer 1st numbers differ - expected: '2046893410201', found: '8476260963145'