#include <cstdio>
#include <bitset>
#include <iostream>
using namespace std;
const int M = 2001;
int read()
{
	int x=0,f=1;char c;
	while((c=getchar())<'0' || c>'9') {if(c=='-') f=-1;}
	while(c>='0' && c<='9') {x=(x<<3)+(x<<1)+(c^48);c=getchar();}
	return x*f;
}
int n,m[2],a[M],x,y,sum;
bitset<3600001> dp[M];string ans;
int Abs(int x) {return x>0?x:-x;}
signed main()
{
	n=read();x=read();y=read();
	m[0]=x-y;m[1]=x+y;
	for(int i=0;i<n;i++) sum+=a[i]=read();
	for(int i=0;i<2;i++)
		if(Abs(m[i])>sum) {puts("No");return 0;}
	for(int i=0;i<2;i++)
	{
		if((m[i]+sum)%2) {puts("No");return 0;}
		else m[i]=(m[i]+sum)/2;
	}
	dp[0][0]=1;
	for(int i=0;i<n;i++) dp[i+1]=dp[i]|(dp[i]<<a[i]);
	if(!dp[n][m[0]] || !dp[n][m[1]])
		{puts("No");return 0;}
	for(int i=n-1;i>=0;i--)
	{
		int x=0;
		for(int j=0;j<2;j++)
			if(!dp[i][m[j]])//must decrease
			{
				m[j]-=a[i];
				x+=(1<<j);
			}
		if(x==0) ans='L'+ans;
		if(x==1) ans='D'+ans;
		if(x==2) ans='U'+ans;
		if(x==3) ans='R'+ans;
	}
	puts("Yes");
	cout<<ans<<endl;
}