#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>
using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
using i64 = long long;
int n, m, a[21], b[20], dp[1<<20][2];
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,tune=native")
int main()
{
ShinLena;
cin >> n >> m;
memset(dp, 0x86, sizeof dp);
for (int i = 1; i <= n; ++i) cin >> a[i];
for (int i = 0; i < m; ++i) cin >> b[i];
dp[0][0] = 0; dp[0][1] = 0;
for (int j = 0; j < (1 << m); ++j)
{
for (int k = 0; k < m; ++k)
{
if (j & (1 << k))
{
int p = j&~(1<<k);
if (dp[p][0] >= 0)
{
int l = dp[p][1];
int t[2] = {dp[p][0] + b[k], l};
if (l < n && t[0] == a[l+1]) ++t[1], t[0] = 0;
if (t[1] > dp[j][1])
dp[j][0] = t[0], dp[j][1] = t[1];
}
}
}
}
cout << &"YES\0NO"[4-(4*(dp[(1<<m)-1][1] == n))];
return 0;
}
