QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#557331 | #7684. Sweet Sugar | rotcar07 | WA | 345ms | 30616kb | C++14 | 787b | 2024-09-11 09:00:28 | 2024-09-11 09:00:29 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
constexpr int maxn=1e6+5;
int n,k,a[maxn];
int ans,dp[maxn][2];
vector<int> e[maxn];
bool dfs(int p,int f){
dp[p][0]=dp[p][1]=-1e9;
dp[p][a[p]&1]=a[p];
for(auto x:e[p])if(x!=f){
if(dfs(x,p)) continue;
int z[2]={-n,-n};
for(int a:{0,1})for(int b:{0,1}) z[a^b]=max(z[a^b],dp[p][a]+dp[x][b]);
dp[p][0]=z[0],dp[p][1]=z[1];
}
if(dp[p][k&1]>=k) return ++ans;
else return 0;
}
inline void solve(){
cin>>n>>k;
for(int i=1;i<=n;i++) cin>>a[i];
for(int i=1;i<=n;i++) e[i].clear();
for(int i=1,u,v;i<n;i++) cin>>u>>v,e[u].push_back(v),e[v].push_back(u);
ans=0;dfs(1,0);
cout<<ans<<'\n';
}
int main(){
int t;cin>>t;
while(t--) solve();
}
Details
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Test #1:
score: 100
Accepted
time: 4ms
memory: 29688kb
input:
4 7 5 1 2 1 2 2 1 2 1 2 2 3 3 4 3 5 5 6 5 7 2 2 1 0 1 2 1 1 1 1 2 1
output:
2 0 1 0
result:
ok 4 number(s): "2 0 1 0"
Test #2:
score: 0
Accepted
time: 3ms
memory: 30616kb
input:
12 1 1 0 1 1 1 1 1 2 1 2 0 1 2 1 1 2 2 1 3 0 1 3 1 1 3 2 1 2000000 0 1 2000000 1 1 2000000 2
output:
0 1 0 0 0 1 0 0 0 0 0 0
result:
ok 12 numbers
Test #3:
score: -100
Wrong Answer
time: 345ms
memory: 30228kb
input:
200000 5 2 1 1 0 0 1 2 4 5 2 4 1 3 2 5 1 0 0 0 0 0 5 1 1 2 3 2 5 4 5 3 1 0 0 0 1 1 4 4 2 3 4 5 2 5 9 1 0 0 0 2 4 3 2 1 3 1 5 1 5 3 0 1 1 0 1 5 4 2 1 4 3 5 1 5 1 0 2 1 1 1 5 3 2 4 3 4 1 4 5 1 1 0 1 1 0 1 5 4 2 1 3 5 2 5 7 0 2 1 1 2 5 1 2 3 2 5 5 4 5 5 0 1 0 1 0 2 4 4 3 5 2 1 5 5 1 0 0 1 0 1 4 1 4 5 2...
output:
1 0 0 0 1 3 3 0 0 2 0 0 2 1 0 0 1 1 0 1 0 1 0 2 1 0 0 0 0 0 1 2 0 0 2 2 0 1 0 0 0 0 1 3 0 0 1 1 2 1 2 0 4 0 0 1 0 1 0 0 1 5 0 1 1 1 0 1 0 1 1 1 1 0 1 1 1 0 3 1 0 1 1 1 2 0 0 0 1 1 0 0 1 0 2 1 5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 1 1 0 1 0 1 1 1 2 0 1 2 0 0 2 0 0 0 0 0 0 0 0 ...
result:
wrong answer 20th numbers differ - expected: '2', found: '1'