#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
ll n, m, k; cin >> n >> m;
vector<ll> a(n + 1), b(m + 1);
for(ll i = 1; i <= n; i ++) cin >> a[i];
for(ll i = 1; i <= m; i ++) cin >> b[i];
vector<ll> dp(1LL << m, -1), left(1LL << m, -1);
dp[0] = 0;
left[0] = 0;
ll x = 1LL << m;
for(ll mask = 0; mask < x; mask ++){
if(dp[mask] == -1) continue;
ll cnt = dp[mask];
if(cnt == n){
cout << "YES" << endl;
return 0;
}
for(ll i = 0; i < m; i ++){
if((mask & 1LL << i)) continue;
ll new_mask = mask | 1LL << i;
if(dp[new_mask] == -1){
k = a[cnt + 1];
ll curr = left[mask] + b[i + 1];
if(curr < k){
dp[new_mask] = cnt;
left[new_mask] = curr;
}
else if(curr == k){
dp[new_mask] = dp[mask] + 1;
left[new_mask] = 0;
}
}
}
}
cout << "NO" << endl;
}
