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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#687666 | #7684. Sweet Sugar | xcyyyyy | WA | 216ms | 5880kb | C++20 | 938b | 2024-10-29 20:20:50 | 2024-10-29 20:20:51 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define N 1000005
#define fr first
#define se second
#define pii pair<int,int>
int n,k,a[N];
vector<int> G[N];
pii f[N][2];
pii operator + (const pii &x,const pii &y){
return {x.fr+y.fr,x.se+y.se};
}
void dfs(int u,int fa){
f[u][0]={-0x3f3f3f3f,0};
f[u][1]={-0x3f3f3f3f,0};
f[u][a[u]&1]={0,a[u]};
for(int v:G[u])if(v^fa){
pii g0=f[u][0],g1=f[u][1];
dfs(v,u);
f[u][0]=max(g0+f[v][0],g1+f[v][1]);
f[u][1]=max(g1+f[v][0],g0+f[v][1]);
}
if(f[u][k&1].se>=k)f[u][0]=max(f[u][0],pii{f[u][k&1].fr+1,0});
f[u][0]=max(f[u][0],{0,0});
}
void sol(){
scanf("%d%d",&n,&k);
for(int i=1;i<=n;i++)G[i].clear();
for(int i=1;i<=n;i++)scanf("%d",&a[i]);
for(int i=1,u,v;i<n;i++){
scanf("%d%d",&u,&v);
G[u].push_back(v);
G[v].push_back(u);
}
dfs(1,0);
cout<<max(f[1][1].fr,f[1][0].fr)<<endl;
}
int main(){
int t;scanf("%d",&t);while(t--)sol();
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 5876kb
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: 2ms
memory: 5880kb
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: 216ms
memory: 5836kb
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 2 0 1 0 2 1 0 0 0 0 0 1 2 0 0 2 2 0 1 0 0 0 0 2 3 0 0 1 1 2 1 2 0 4 0 1 1 0 1 0 0 1 5 0 1 1 1 0 1 1 1 1 1 1 0 1 1 1 0 3 1 0 1 0 0 4 0 0 0 1 1 0 0 1 0 2 0 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 1 0 0 0 0 0 ...
result:
wrong answer 43rd numbers differ - expected: '3', found: '2'