#include <bits/stdc++.h>
using namespace std;
int main () {
int n, m;
cin >> n >> m;
int ar[n], br[m];
for (int i = 0; i < n; i++) {
cin >> ar[i];
}
for (int i = 0; i < m; i++) {
cin >> br[i];
}
vector<int> pref(n);
for (int i = 0; i < n; i++) {
pref[i] = ar[i];
if (i > 0) pref[i] += pref[i - 1];
}
vector<int> dp(1<<m);
dp[0] = 1;
for (int msk = 0; msk < (1<<m); msk++) {
if (dp[msk]) {
int cur = 0;
for (int j = 0; j < m; j++) {
if ((msk>>j) & 1) {
cur += br[j];
}
}
int in = 0;
while (in < n && pref[in] <= cur) ++in;
if (in == n) {
cout << "YES" << '\n';
return 0;
}
for (int j = 0; j < m; j++) {
if ((msk>>j) & 1) continue;
if (cur + br[j] <= pref[in]) {
dp[msk|(1<<j)] = 1;
}
}
}
}
cout << "NO" << '\n';
}
