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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#687670#7684. Sweet SugarxcyyyyyWA 167ms5884kbC++20928b2024-10-29 20:21:582024-10-29 20:21:58

Judging History

你现在查看的是最新测评结果

  • [2024-10-29 20:21:58]
  • 评测
  • 测评结果:WA
  • 用时:167ms
  • 内存:5884kb
  • [2024-10-29 20:21:58]
  • 提交

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]={0,0};
	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();
}

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 5884kb

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: 5876kb

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: 167ms
memory: 5772kb

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'