#include <bits/stdc++.h>
using namespace std;
#define all(v) v.begin(),v.end()
#define eb emplace_back
#define ll long long
#define fi first
#define se second
int t,n,i,m,j;
const int lg = 21;
int a[lg+1],b[lg];
int dp[lg][1<<lg];
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin>>n>>m;
for(i = 1;i<=n;i++)cin>>a[i];
for(i = 0;i<m;i++)cin>>b[i];
a[0] = 1;
dp[0][0] = 1;
for(i = 1;i<=n;i++)
{
for(int mask = 1;mask<(1<<m);mask++)
{
for(j = 0;j<m;j++)
{
if(mask>>j&1)
{
int msk = mask ^ (1<<j);
if(dp[i-1][msk] == a[i-1])
{
dp[i][mask] = b[j];
break;
}
if(dp[i][msk] && dp[i][msk] + b[j] <= a[i])
{
dp[i][mask] = dp[i][msk] + b[j];
break;
}
}
}
if(i == n && dp[i][mask] == a[n])
{
cout<<"YES";
return 0;
}
}
}cout<<"NO";
return 0;
}
