#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 42
#endif
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<int> a(n), b(m);
for (int i = 0; i < n; i++) {
cin >> a[i];
}
for (int i = 0; i < m; i++) {
cin >> b[i];
}
vector<pair<int, int>> dp(1 << m);
for (int mask = 0; mask < (1 << m); mask++) {
for (int i = 0; i < m; i++) {
if (mask & (1 << i)) continue;
auto [id, x] = dp[mask];
if (id == n - 1) {
continue;
}
if (x + b[i] == a[id + 1]) {
dp[mask | (1 << i)] = {id + 1, 0};
}
else {
dp[mask | (1 << i)] = {id, x + b[i]};
}
}
}
cout << (dp[(1 << n) - 1].first == n - 1 ? "YES" : "NO") << endl;
return 0;
}
