//In His Name
#include <bits/stdc++.h>
using namespace std;
#define ll long long
//#define int ll
typedef pair<int, int> pii;
typedef pair<long long, int> pli;
typedef pair<long long, long long> pll;
#define F first
#define S second
#define pb push_back
#define bug(x) cout << "Ah shit , here we go again : " << x <<endl
#define all(x) x.begin() , x.end()
#define ceil(x,y) x/y + min(1ll,x%y)
const int maxn = 22 , MOD = 1e9 + 7;
const ll INF = 1e18;
int n , m , a[maxn] , c[maxn] , ps[maxn] , dp[(1<<maxn)] , ok = 0;
int main(){
ios_base::sync_with_stdio(false);
cin >> n >> m;
for(int i = 1 ; i <= n ; i++) cin >> a[i];
for(int i = 0 ; i < m ; i++) cin >> c[i];
for(int i = 1 ; i <= n ; i++) ps[i] = ps[i-1] + a[i];
for(int mask = 1 ; mask < (1 << m) ; mask++){
int maxi = 0 , sum = 0 , cnt = m-1 , tmp = mask;
vector<int> one;
while(tmp > 0){
if(tmp & 1) {
one.pb(cnt);
sum += c[cnt];
}
cnt --;
tmp >>= 1;
}
for(int i : one) maxi = max(maxi , dp[mask ^ (1<<i)]);
if(sum == ps[maxi+1]) dp[mask] = maxi + 1;
else dp[mask] = maxi;
if(dp[mask] == n) return cout << "YES" , 0;
}
cout << "NO";
}
