#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define ff first
#define ss second
#define pb push_back
#define vi vector<int>
#define fr(i,ii,iii) for(int i=ii;i<iii;i++)
const int N=21,M=1002;
int n,m,a[N],b[N],c[N],d[N];
bool ok;
void check(){
fr(i,1,m+1){
d[c[i]]+=b[i];
}
bool c=1;
fr(i,1,n+1){
if(d[i]!=a[i])c=0;
}
if(c)ok=1;
}
void rec(int x){
if(x==n+1){
check();
return;
}
fr(i,1,m+1){
rec(x+1);
c[x]=i;
rec(x+1);
}
}
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);
cin>>n>>m;
fr(i,1,n+1)cin>>a[i];
fr(i,1,m+1)cin>>b[i];
rec(1);
cout<<(ok?"YES":"NO");
}
