#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<int> a(n);
for (auto &a_i: a) {
cin >> a_i;
}
vector<int> b(m);
for (auto &b_i: b) {
cin >> b_i;
}
sort(a.begin(), a.end(), greater<>());
sort(b.begin(), b.end());
vector<vector<int>> masks(n);
for (int mask = (1 << m) - 1; mask >= 0; --mask) {
int sum = 0;
for (int i = 0; i < m; ++i) {
if ((mask) >> i & 1) {
sum += b[i];
}
}
for (int i = 0; i < n; ++i) {
if (sum == a[i]) {
masks[i].push_back(mask);
}
}
}
vector<vector<bool>> dp(n + 1, vector<bool>(1 << m));
dp[0][0] = true;
int used = 0;
bool good = true;
for (int i = 0; i < n; ++i) {
int curgood = false;
for (auto &use: masks[i]) {
if ((used & use) == use) {
curgood = true;
break;
}
}
if (!curgood) {
good = false;
}
}
cout << (good ? "YES" : "NO");
return 0;
}
