QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#718161 | #6438. Crystalfly | frogman | WA | 2ms | 8864kb | C++14 | 1.4kb | 2024-11-06 19:51:11 | 2024-11-06 19:51:20 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define N 100010
#define int long long
vector<int> g[N];
int t[N],a[N],f[N][3];
int n;
void dfs(int x,int fa){
f[x][0]=0;
f[x][1]=0;
f[x][2]=0;
int sum=0,mx=0;
vector<int> p,s;
for(int i=0;i<g[x].size();++i){
int v=g[x][i];
if(v==fa){
continue;
}
dfs(v,x);
sum+=f[v][0];
mx=max(mx,f[v][1]-f[v][0]);
p.push_back(f[v][2]-f[v][0]);
s.push_back(f[v][2]-f[v][0]);
}
for(int i=1;i<p.size();++i){
p[i]=max(p[i],p[i-1]);
}
for(int i=s.size()-2;i>=0;--i){
s[i]=max(s[i],s[i+1]);
}
f[x][2]=a[x]+sum;
f[x][1]=sum+mx;
f[x][0]=sum+mx;
for(int i=0;i<g[x].size();++i){
int v=g[x][i];
if(v==fa){
continue;
}
if(t[v]==3){
int y=0;
if(i){
y=max(y,p[i-1]);
}
if(i<g[x].size()-1){
y=max(y,s[i+1]);
}
f[x][1]=max(f[x][1],sum+y+f[v][1]-f[v][0]);
f[x][0]=max(f[x][0],sum+y+f[v][1]-f[v][0]);
}
}
f[x][1]+=a[x];
}
inline void solve(){
cin>>n;
for(int i=1;i<=n;++i){
cin>>a[i];
}
for(int i=1;i<=n;++i){
cin>>t[i];
}
for(int i=1;i<n;++i){
int x,y;
cin>>x>>y;
g[x].push_back(y);
g[y].push_back(x);
}
dfs(1,0);
cout<<f[1][1]<<'\n';
for(int i=1;i<=n;++i){
g[i].clear();
}
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
int T;
cin>>T;
while(T--){
solve();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 7944kb
input:
2 5 1 10 100 1000 10000 1 2 1 1 1 1 2 1 3 2 4 2 5 5 1 10 100 1000 10000 1 3 1 1 1 1 2 1 3 2 4 2 5
output:
10101 10111
result:
ok 2 number(s): "10101 10111"
Test #2:
score: -100
Wrong Answer
time: 2ms
memory: 8864kb
input:
10 6 8 1 1 5 8 9 2 1 2 2 2 2 1 2 2 3 2 4 1 5 2 6 6 6 4 4 1 3 6 2 1 3 3 3 3 1 2 1 3 3 4 4 5 5 6 6 10 5 1 8 5 1 1 3 1 2 2 2 1 2 2 3 2 4 2 5 3 6 10 6 8 8 9 6 9 5 6 6 4 2 1 3 3 2 2 2 2 3 1 1 2 1 3 3 4 4 5 5 6 4 7 2 8 7 9 9 10 7 10 9 1 5 7 5 4 1 1 1 2 1 3 2 1 2 1 3 3 4 3 5 5 6 1 7 5 7 1 1 4 2 3 1 3 2 2 1...
output:
25 30 24 61 36 14 17 28 19 19
result:
wrong answer 2nd numbers differ - expected: '24', found: '30'