QOJ.ac

QOJ

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
#393721#7684. Sweet SugarKevin5307WA 110ms5804kbC++231.4kb2024-04-19 10:04:372024-04-19 10:04:37

Judging History

你现在查看的是最新测评结果

  • [2024-04-19 10:04:37]
  • 评测
  • 测评结果:WA
  • 用时:110ms
  • 内存:5804kb
  • [2024-04-19 10:04:37]
  • 提交

answer

//Author: Kevin
#include<bits/stdc++.h>
//#pragma GCC optimize("O2")
using namespace std;
#define ll long long
#define ull unsigned ll
#define pb emplace_back
#define mp make_pair
#define ALL(x) (x).begin(),(x).end()
#define rALL(x) (x).rbegin(),(x).rend()
#define srt(x) sort(ALL(x))
#define rev(x) reverse(ALL(x))
#define rsrt(x) sort(rALL(x))
#define sz(x) (int)(x.size())
#define inf 0x3f3f3f3f
#define pii pair<int,int>
#define lb(v,x) (int)(lower_bound(ALL(v),x)-v.begin())
#define ub(v,x) (int)(upper_bound(ALL(v),x)-v.begin())
#define uni(v) v.resize(unique(ALL(v))-v.begin())
#define longer __int128_t
void die(string S){puts(S.c_str());exit(0);}
int n,k;
int a[1001000];
vector<int> G[1001000];
int ans;
int f[1001000][2];
void dfs(int u,int fa)
{
	f[u][0]=f[u][1]=-inf;
	f[u][a[u]&1]=a[u];
	for(auto v:G[u]) if(v!=fa)
	{
		dfs(v,u);
		int tmp[2]={-inf,-inf};
		for(int a=0;a<2;a++)
			for(int b=0;b<2;b++)
				tmp[a^b]=max(tmp[a^b],f[u][a]+f[v][b]);
		memcpy(f[u],tmp,sizeof(tmp));
	}
	if(f[u][k&1]>=k)
	{
		f[u][0]=0;
		f[u][1]=-inf;
		ans++;
	}
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int t;
	cin>>t;
	while(t--)
	{
		cin>>n>>k;
		for(int i=1;i<=n;i++)
			cin>>a[i];
		for(int i=1;i<=n;i++)
			G[i].clear();
		for(int i=1;i<n;i++)
		{
			int u,v;
			cin>>u>>v;
			G[u].pb(v);
			G[v].pb(u);
		}
		ans=0;
		dfs(1,0);
		cout<<ans<<'\n';
	}
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 5748kb

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: 5784kb

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: 110ms
memory: 5804kb

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
0
0
2
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
0
0
0
0
0
0
...

result:

wrong answer 20th numbers differ - expected: '2', found: '1'