#include<bits/stdc++.h>
using namespace std;
using pii=array<int,2>;
const int N=21;
int a[N],b[N];
pii dp[1<<N];
int main(){
ios::sync_with_stdio(0); cin.tie(0);
int n,m;
cin >> n >> m;
for(int i=1;i<=n;i++) cin >> a[i];
for(int i=1;i<=m;i++) cin >> b[i];
for(int i=0;i<(1<<m);i++){
int st=dp[i][0];
int cnt=dp[i][1];
for(int j=0;j<n;j++){
if((i&(1<<j))!=0) continue;
if(cnt+b[i]==a[st]){
dp[i|(1<<j)]={st+1,0};
}
else if(cnt+b[i]<a[st]){
dp[i|(1<<j)]={st,cnt+b[i]};
}
}
}
for(int i=1;i<(1<<m);i++){
if(dp[i][0]==n){
cout << "YES";
return 0;
}
}
cout << "NO";
}
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