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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#638386 | #6438. Crystalfly | wxiaobaivv | WA | 7ms | 31652kb | C++14 | 1.6kb | 2024-10-13 15:48:06 | 2024-10-13 15:48:08 |
Judging History
answer
#include<iostream>
#include<cstring>
#include<vector>
#define int long long
using namespace std;
const int N=1e6+10;
vector<int> rs[N];
int dp[N][2];//0
int n,v[N],tm[N];
int get(int c)
{
return -(dp[c][1]+v[c]-dp[c][0]);
}
void dfs(int u,int last)
{
int l1=-1,l2=-2;
int m1=-1,m2=-2;
int am=-1;
for(auto c:rs[u])
{
if(c==last) continue;
dfs(c,u);
dp[u][1]+=dp[c][0];
if(am==-1||v[c]>v[am]) am=v[c];
if(tm[c]==3)
{
if(m1==-1||v[c]>v[m1]) m2=m1,m1=c;
else if(m2==-1||v[c]>v[m2]) m2=c;
}
if(l1==-1||get(c)<get(l1)) l2=l1,l1=c;
else if(l2==-1||get(c)<get(l2)) l2=c;
}
if(am!=-1)
dp[u][0]=dp[u][1]+v[am];
if(m1!=-1)
if(l1!=m1&&l1!=-1) dp[u][0]=max(dp[u][0],dp[u][1]+v[m1]-get(l1));
else if(l2!=m1&&l2!=-1) dp[u][0]=max(dp[u][0],dp[u][1]+v[m1]-get(l2));
if(m2!=-1)
if(l1!=m2&&l1!=-1) dp[u][0]=max(dp[u][0],dp[u][1]+v[m2]-get(l1));
else if(l2!=m2&&l2!=-1) dp[u][0]=max(dp[u][0],dp[u][1]+v[m2]-get(l2));
// cout<<u<<" "<<dp[u][0]<<"|"<<dp[u][1]<<"\n";
}
void slove()
{
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>v[i];
rs[i].clear();
dp[i][0]=dp[i][1]=0;
}
for(int i=1;i<=n;i++) cin>>tm[i];
for(int i=1;i<n;i++)
{
int l,r; cin>>l>>r;
rs[l].push_back(r);
rs[r].push_back(l);
}
dfs(1,1);
cout<<dp[1][0]+v[1]<<"\n";
}
signed main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int ts=1; cin>>ts;
while(ts--) slove();
}
Details
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Test #1:
score: 100
Accepted
time: 7ms
memory: 31652kb
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: 0ms
memory: 31456kb
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 35 64 33 20 17 31 25 19
result:
wrong answer 2nd numbers differ - expected: '24', found: '30'