#include <bits/stdc++.h>
using namespace std;
#define el "\n"
#define fi first
#define se second
#define pii pair<int,int>
#define fre(NAME) freopen(NAME".inp","r",stdin); freopen(NAME".out","w",stdout)
int n,m;
int a[21],b[21];
int dp[(1<<20)-1][2];
string trans(int x)
{
if(x==0) return "0";
string temp;
while(x>0)
{
temp+=char('0'+x%2);
x/=2;
}
reverse(temp.begin(),temp.end());
return temp;
}
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
cin>>n>>m;
for(int i=1;i<=n;i++) cin>>a[i];
for(int j=0;j<m;j++) cin>>b[j];
memset(dp,-1,sizeof(dp));
dp[0][0]=1;
dp[0][1]=0;
for(int i=1;i<(1<<m);i++)
{
for(int j=0;j<m;j++)
{
if(!((i>>j)&1)) continue;
int prev = i^(1<<j);
if(dp[prev][0]==-1) continue;
int have=dp[prev][1]+b[j];
int need=a[dp[prev][0]];
//cout<<trans(prev)<<" "<<have<<" "<<need<<" "<<j<<el;
if(have<need)
{
dp[i][0]=dp[prev][0];
dp[i][1]=have;
}
else if(have==need)
{
dp[i][0]=dp[prev][0]+1;
dp[i][1]=0;
}
}
if(dp[i][0]==n+1)
{
cout<<"YES";
return 0;
}
}
cout<<"NO";
}
