#include <bits/stdc++.h>
using namespace std;
int a[22], b[22];
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
srand(time(NULL));
int n, m;
cin >> n >> m;
for (int i = 0; i < n; i++) cin >> a[i];
for (int i = 0; i < m; i++) cin >> b[i];
if (n == 1) {
for (int mask = 0; mask < (1 << m); mask++) {
int ans = 0;
for (int i = 0; i < m; i++)
if (mask & (1 << i))
ans += b[i];
if (ans == a[0])
return cout << "YES\n", 0;
}
cout << "NO\n";
return 0;
}
sort(b, b + m);
do {
int s = 0;
int j = 0;
for (int i = 0; i < m && j < n; i++) {
s += b[i];
if (s > a[j]) break;
if (s == a[j]) {
s = 0;
j++;
}
}
if (j == n) {
return cout << "YES\n", 0;
}
} while (next_permutation(b, b + m));
cout << "NO\n";
return 0;
}
