#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define fr first
#define sc second
#define N ((ll)(2e5+100))
#define MAX ((ll)(1e16+100))
#define ARRS ((ll)(2e5+100))
#define MOD ((ll)(1e9+7))
#define pb push_back
ll dp[22][1060000];
ll a[40];
ll b[40];
ll n,m;
int main(){
cin>>n>>m;
for(int i=0; i<n; i++)
cin>>b[i];
for(int i=1; i<n; i++)
b[i]+=b[i-1];
for(int i=0; i<m; i++)
cin>>a[i];
ll pas=0;
dp[0][0]=1;
for(int i=0; i<=n; i++){
for(int t=0; t<(1<<m); t++){
if(!dp[i][t])continue;
if(i==n){
pas=1;
break;
}
if(t==b[i])
dp[i+1][t]=1;
for(int j=0; j<m; j++){
if(!((t>>j)&1))
dp[i][t|(1<<j)]=1;
}
//cout<<i<<" "<<t<<" -> "<<dp[i][t]<<endl;
}
//cout<<endl;
}
if(pas){
cout<<"YES";
}
else cout<<"NO";
}
