#include<bits/stdc++.h>
#define ll long long
using namespace std;const int N=1005,M=5;
int T,n,m;ll L,R,p[N],vi[N];vector<ll>f[N][55],tmp[55];vector<int>v[N];
void dfs(int u,int fa){for(int i=0;i<=m;i++)f[u][i].clear();f[u][0].push_back(0);
	for(auto i:v[u])if(i!=fa){dfs(i,u),p[u]+=p[i];for(int j=0;j<m;j++)tmp[j].clear();
		for(int a=0;a<m;a++)for(int b=0;a+b<m;b++)
			for(auto x:f[u][a])for(auto y:f[i][b])tmp[a+b].push_back(x+y);
		for(int j=0;j<m;j++){sort(tmp[j].begin(),tmp[j].end());
			tmp[j].erase(unique(tmp[j].begin(),tmp[j].end()),tmp[j].end()),f[u][j].clear();
			for(int k=0;k<min(M,(int)tmp[j].size());k++)f[u][j].push_back(tmp[j][k]);
			for(int k=max(M,(int)tmp[j].size()-M);k<tmp[j].size();k++)f[u][j].push_back(tmp[j][k]);
		}
	}
	for(int i=m-1;~i;i--)if(!f[u][i].empty()){int len=f[u][i].size();bool fl=0,tg=0;for(auto j:f[u][i])fl|=L<=p[u]-j&&p[u]-j<=R;
		if(len>=2*M){
			for(int j=1;j<M;j++)tg|=f[u][i][j]-f[u][i][j-1]<=R-L;for(int j=1;j<M;j++)tg|=f[u][i][len-j]-f[u][i][len-j-1]<=R-L;
			fl|=tg&&L<=p[u]-f[u][i][0]&&p[u]-f[u][i][len-1]<=R;
		}if(fl)f[u][i+1].push_back(p[u]);
	}
}
int main(){//freopen("tree.in","r",stdin),freopen("tree.out","w",stdout);
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin>>T;
	while(T--){cin>>n>>m>>L>>R,m++;for(int i=1;i<=n;i++)cin>>p[i];
		for(int x,y,i=1;i<n;i++)cin>>x>>y,v[x].push_back(y),v[y].push_back(x);dfs(1,0);
		for(int i=1;i<=m;i++)cout<<(!f[1][i].empty()&&f[1][i].back()==p[1]);cout<<"\n";
		for(int i=1;i<=n;i++)v[i].clear();
	}
}