#include<bits/stdc++.h>
using namespace std;
#define in array<int, 2>
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
const int SMX = 1e3+3;
int dp[1<<21];
int S[1<<21];
signed main()
{
fast();
int n, m;
cin >> n >> m;
vector<int> a(n+1, 0);
vector<int> b(m);
for(int i = 1; i <= n; i++)
{
cin >> a[i];
a[i]+=a[i-1];
}
for(int i = 0; i < m; i++)
cin >> b[i];
for(int i = 0; i < m; i++)
S[1<<i] = b[i];
for(int i = 0; i < (1<<m); i++)
S[i] = S[(i&-i)] + S[i-(i&-i)];\
for(int i = 0; i < (1<<m); i++)
{
for(int j = 0; j < m; j++)
{
if((i>>j)&1ll)
dp[i] = max(dp[i], dp[i^(1<<j)]);
}
if((dp[i] < n) && (a[dp[i]+1] == S[i]))
dp[i]++;
}
if(dp[(1<<m)-1] == n)
cout << "YES\n";
else
cout << "NO\n";
return 0;
}
