#include <bits/stdc++.h>
#define N 20
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define rep(i, l, r) for(int i = l; i <= r; i++)
#define rep2(i, l, r) for(int i = r; i >= l; i--)
using namespace std;
typedef pair<int,int> ii;
typedef pair<ii,int> iii;
typedef pair<ii, ii> iv;
typedef unsigned long long ull;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const bool multi_test = false;
const string NAME = "bt";
int exp(int x, int y){
int res = 1;
while (y){
if (y & 1) res = res * x % MOD;
x = x * x % MOD;
y >>= 1;
}
return res;
}
int n, m;
int a[N+5], b[N+5];
struct info{
int val = 0, left = 0;
bool operator < (info y){
if (val == y.val) return left < y.left;
return val < y.val;
}
} dp[(1<<N)+5];
void solve(){
cin >> n >> m;
rep(i, 1, n) cin >> a[i];
rep(i, 1, m) cin >> b[i];
rep(mask, 1, (1<<m) - 1){
rep(i, 1, m){
if ((mask >> (i - 1)) & 1){
info k = dp[mask ^ (1<<(i-1))];
if (k.left + b[i] == a[k.val + 1]){
k.val ++;
k.left = 0;
} else {
k.left += b[i];
}
if (dp[mask] < k) dp[mask] = k;
}
}
}
if (dp[(1<<m) - 1].val == n) cout << "YES";
else cout << "NO";
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
if (multi_test) cin >> t;
while (t--) solve();
}
