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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#164578 | #7103. Red Black Tree | ucup-team1359 | AC ✓ | 1099ms | 50324kb | C++14 | 2.4kb | 2023-09-05 10:34:19 | 2023-09-05 10:34:20 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int T,n,m,q,k,u,v,w,r[105000],f[105000];
int dep[105000],fa[105000][17],gr[105000][17];
long long dis[105000][17],disrt[105000];
vector<pair<int,long long> > edge[105000];
pair<long long,int> quer[105000];
void dfs(int x,int y) {
gr[x][0]=f[x];
for (int j=1;j<=16;j++) {
fa[x][j]=fa[fa[x][j-1]][j-1];
dis[x][j]=dis[x][j-1]+dis[fa[x][j-1]][j-1];
gr[x][j]=gr[x][j-1]|gr[fa[x][j-1]][j-1];
}
for (auto cur:edge[x]) {
if (cur.first==y) continue;
dep[cur.first]=dep[x]+1;
fa[cur.first][0]=x;
dis[cur.first][0]=cur.second;
disrt[cur.first]=disrt[x]+cur.second;
dfs(cur.first,x);
}
}
int lca(int u,int v) {
if (dep[u]>dep[v]) swap(u,v);
for (int j=16;j>=0;j--) if (dep[v]-dep[u]>=(1<<j)) v=fa[v][j];
if (u==v) return u;
for (int j=16;j>=0;j--) if (fa[u][j]!=fa[v][j]) {
u=fa[u][j];
v=fa[v][j];
}
return fa[u][0];
}
long long getdis(int u) {
long long res=0;
for (int j=16;j>=0;j--) {
if (!gr[u][j]) {
res+=dis[u][j];
u=fa[u][j];
}
}
return res;
}
int main() {
scanf("%d",&T);
while (T--) {
scanf("%d%d%d",&n,&m,&q);
for (int i=1;i<=m;i++) scanf("%d",&r[i]);
for (int i=1;i<=n;i++) f[i]=0;
for (int i=1;i<=m;i++) f[r[i]]=1;
for (int i=1;i<=n;i++) edge[i].clear();
for (int i=1;i<n;i++) {
scanf("%d%d%d",&u,&v,&w);
edge[u].push_back({v,1ll*w});
edge[v].push_back({u,1ll*w});
}
dfs(1,-1);
while (q--) {
scanf("%d",&k);
for (int i=1;i<=k;i++) {
scanf("%d",&quer[i].second);
quer[i].first=getdis(quer[i].second);
}
sort(quer+1,quer+1+k);
if (k==1) {
printf("0\n");
continue;
}
long long ans=quer[k-1].first,maxdis=disrt[quer[k].second];
int curlca=quer[k].second;
for (int j=k-1;j>=1;j--) {
curlca=lca(curlca,quer[j].second);
maxdis=max(maxdis,disrt[quer[j].second]);
if (j>1) ans=min(ans,max(quer[j-1].first,maxdis-disrt[curlca]));
else ans=min(ans,maxdis-disrt[curlca]);
}
printf("%lld\n",ans);
}
}
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 12144kb
input:
2 12 2 4 1 9 1 2 1 2 3 4 3 4 3 3 5 2 2 6 2 6 7 1 6 8 2 2 9 5 9 10 2 9 11 3 1 12 10 3 3 7 8 4 4 5 7 8 4 7 8 10 11 3 4 5 12 3 2 3 1 2 1 2 1 1 3 1 1 1 2 1 2 3 1 2 3
output:
4 5 3 8 0 0 0
result:
ok 7 lines
Test #2:
score: 0
Accepted
time: 1099ms
memory: 50324kb
input:
522 26 1 3 1 1 4 276455 18 6 49344056 18 25 58172365 19 9 12014251 2 1 15079181 17 1 50011746 8 9 2413085 23 24 23767115 22 2 26151339 26 21 50183935 17 14 16892041 9 26 53389093 1 20 62299200 24 18 56114328 11 2 50160143 6 26 14430542 16 7 32574577 3 16 59227555 3 15 8795685 4 12 5801074 5 20 57457...
output:
148616264 148616264 0 319801028 319801028 255904892 317070839 1265145897 1265145897 1072765445 667742619 455103436 285643094 285643094 285643094 317919339 0 785245841 691421476 605409472 479058444 371688030 303203698 493383271 919185207 910180170 919185207 121535083 181713164 181713164 181713164 181...
result:
ok 577632 lines
Extra Test:
score: 0
Extra Test Passed