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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#393785 | #7684. Sweet Sugar | DeaphetS | WA | 143ms | 31412kb | C++14 | 782b | 2024-04-19 12:03:06 | 2024-04-19 12:03:07 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define N 1000010
int T,n,k,a[N],mx[N][2],ans;
vector<int>d[N];
void dfs(int x,int f)
{
int t[2];
mx[x][a[x]&1]=a[x];
for(auto y:d[x])if(y!=f){
dfs(y,x);
t[0]=0,t[1]=-19990307;
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
t[i^j]=max(t[i^j],mx[x][i]+mx[y][j]);
for(int i=0;i<2;i++)mx[x][i]=t[i];
}
if(mx[x][k&1]>=k)ans++,mx[x][0]=0,mx[x][1]=-19990307;
}
void init()
{
ans=0;
scanf("%d%d",&n,&k);
for(int i=1;i<=n;i++){
mx[i][0]=0,mx[i][1]=-19990307;
scanf("%d",&a[i]);
d[i].clear();
}
for(int i=2;i<=n;i++){
int u,v;
scanf("%d%d",&u,&v);
d[u].push_back(v);
d[v].push_back(u);
}
dfs(1,0);
printf("%d\n",ans);
}
int main()
{
scanf("%d",&T);
while(T--)init();
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 29716kb
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: 0ms
memory: 30832kb
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: 143ms
memory: 31412kb
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 3 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 2 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 73rd numbers differ - expected: '1', found: '2'