#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const int N = 100003, mod = 1e9 + 7, inf = 1e9 + 7;
int n, m;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// freopen("movie.in", "r", stdin);
// freopen("movie.out", "w", stdout);
cin >> n >> m;
vector<int> vn(n), vm(m), last((1 << m)), dp((1 << m));
for(int i = 0; i < n; ++i){
cin >> vn[i];
}
for(int j = 0; j < m; ++j){
cin >> vm[j];
}
dp[0] = 0;
last[0] = 0;
for(int s = 1; s < (1 << m); ++s){
for(int i = 0; i < m; ++i){
if((s & (1 << i))){
int prev = s - (1 << i);
if(dp[prev] == n){
dp[s] = n;
break;
}
if(last[prev] + vm[i] < vn[dp[prev]]){
dp[s] = dp[prev];
last[s] = last[prev] + vm[i];
break;
}
if(last[prev] + vm[i] == vn[dp[prev]]){
dp[s] = dp[prev] + 1;
last[s] = 0;
break;
}
}
}
// cout << dp[s] << " " << last[s] << "\n";
}
if(dp[(1 << m) - 1] == n){
cout << "YES";
}
else{
cout << "NO";
}
// cout << dp[(1 << m) - 1];
}
