#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define int long long
int a[27], b[27];
int n, m;
const int maxN = 2e6 + 7;
int dp[maxN], dp1[maxN];
void solve() {
cin >> n >> m;
for(int i = 1; i <= n; i++) cin >> a[i];
for(int i = 1; i <= m; i++) cin >> b[i];
memset(dp, -1, sizeof(dp));
memset(dp1, -1, sizeof(dp1));
dp[0] = 1;
dp[1] = 0;
for(int i = 0; i < (1 << m); i++) {
for(int j = 0; j < m; j++) {
if(!(i & (1 << j))) continue;
int cur = i & ~(1 << j);
if(dp[cur] == -1) continue;
int now = dp1[cur] + b[j + 1];
int target = a[dp[cur]];
if(target > now) {
dp[i] = dp[cur];
dp1[i] = now;
} else if(target == now) {
dp[i] = dp[cur] + 1;
dp1[i] = 0;
}
}
if(dp[i] == n+1) {
cout << "YES\n";
return;
}
}
cout << "NO\n";
}
signed main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//freopen("input.txt", "r", stdin);
int t = 1;
//cin >> t;
while(t--) solve();
}
