#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define io ios_base::sync_with_stdio(0),cin.tie(0);
#define str string
using namespace std;
const int maxn=1e6+2;
int t, n , m, a[1003],b[1003],sum;
signed main() {
io;
cin >> n>> m;
for(int i = 1; i <= n ; i++){
cin >> a[i];
}
for(int j = 1; j <= m ;j++){
cin >> b[j];
}
int cnt = 0;
for(int i = 1 ; i <= n ; i++){
for(int j = 1; j <= m ;j++ ){
next_permutation(b + 1 , b + m + 1);
sum = 0;
bool k = 0;
for(int h = 1 ; h <= m ; h++){
sum+=b[h];
if(sum == a[i]){
cnt++;
k = 1;
break;
}
}
if(k)break;
}
}
if(cnt == n) cout << "YES";
else cout << "NO";
}
