QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#161179 | #7103. Red Black Tree | ucup-team197# | AC ✓ | 884ms | 37444kb | C++14 | 1.9kb | 2023-09-02 22:51:17 | 2023-09-02 22:51:17 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
const ll mod=998244353;
const int N=2e5+1;
typedef pair<ll,int> pli;
int n,m,q;
vector<pair<ll,int> >adj[N];
ll d[N];
ll e[N];
int h[N];
bool red[N];
int anc[N][20];
const int iu=17;
void dfs(int id,int p){
for(auto c:adj[id]){
if(c.se==p) continue;
d[c.se]=d[id]+c.fi;
e[c.se]=e[id]+c.fi;
h[c.se]=h[id]+1;
if(red[c.se]) e[c.se]=0;
anc[c.se][0]=id;
for(int i=1; i<iu ;i++){
anc[c.se][i]=anc[anc[c.se][i-1]][i-1];
}
dfs(c.se,id);
}
}
int lca(int u,int v){
if(h[u]<h[v]) swap(u,v);
int k=h[u]-h[v];
for(int i=iu-1; i>=0 ;i--){
if((k>>i)&1) u=anc[u][i];
}
if(u==v) return u;
for(int i=iu-1; i>=0 ;i--){
if(anc[u][i]!=anc[v][i]){
u=anc[u][i];
v=anc[v][i];
}
}
return anc[u][0];
}
pair<ll,int>qr[N];
void solve(){
cin >> n >> m >> q;
for(int i=1; i<=n ;i++){
adj[i].clear();
red[i]=false;
}
for(int i=1; i<=m ;i++){
int r;cin >> r;red[r]=true;
}
for(int i=1; i<n ;i++){
int u,v;ll w;
cin >> u >> v >> w;
adj[u].push_back({w,v});
adj[v].push_back({w,u});
}
dfs(1,0);/*
cout << "STats" << endl;
for(int i=1; i<=n ;i++){
cout << i << ": " << d[i] << ' ' << e[i] << ' ' << h[i] << endl;
}*/
for(int z=1; z<=q ;z++){
int k;cin >> k;
for(int j=1; j<=k ;j++){
cin >> qr[j].se;
qr[j].fi=e[qr[j].se];
}
sort(qr+1,qr+k+1);
reverse(qr+1,qr+k+1);
ll ans=qr[1].fi;
int g;
ll mx=0;
for(int i=1; i<=k ;i++){
if(i==1) g=qr[i].se;
else g=lca(g,qr[i].se);
//cout << "now " << i << ' ' << g << ' ' << qr[i].fi << ' ' << qr[i].se << endl;
mx=max(mx,d[qr[i].se]);
ll cur=mx-d[g];
if(i!=k) cur=max(cur,qr[i+1].fi);
//cout << "ha " << cur << endl;
ans=min(ans,cur);
}
cout << ans << '\n';
}
}
int main(){
ios::sync_with_stdio(false);cin.tie(0);
int t;cin >> t;while(t--) solve();
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 12860kb
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: 884ms
memory: 37444kb
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