#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
fast;
}
int main()
{
setIO();
int n,m;
cin>>n>>m;
int maxSet = (1<<m);
vi leftOver(maxSet);
vi numFilled(maxSet,-1);
vi a(n + 1),b(m);
for (int i = 1;i<=n;i++)cin>>a[i];
for (int i = 0;i<m;i++)cin>>b[i];
numFilled[0] = 0;
leftOver[0] = 0;
for (int mask = 0;mask < maxSet;mask++){
for (int i = 0;i<m;i++){
if (mask & (1<<i)){
int prevMask = mask - (1<<i);
if (numFilled[prevMask] == -1)continue;
if (leftOver[prevMask] + b[i] < a[numFilled[prevMask] + 1]){
numFilled[mask] = numFilled[prevMask];
leftOver[mask] = leftOver[prevMask] + b[i];
}
else if (leftOver[prevMask] + b[i] == a[numFilled[prevMask] + 1]){
numFilled[mask] = numFilled[prevMask] + 1;
leftOver[mask] = 0;
}
}
}
}
//cout<<numFilled[maxSet - 1]<<endl;
if (numFilled[maxSet - 1] == n)cout<<"YES";
else cout<<"NO";
return 0;
}
