#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define f first
#define s second
#define chmin(a, b) a = min(a,b)
#define chmax(a, b) a = max(a,b)
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define all(x) x.begin(),x.end()
#define vec vector
const int MAX_N = 20;
int a[MAX_N], b[MAX_N], ps[MAX_N+2] = {0};
int dp[1<<MAX_N] = {0};
int main() {
ios::sync_with_stdio(false); cin.tie(0);
int n, m; cin >> n >> m;
F0R(i,n) {cin >> a[i]; ps[i+1] = a[i]+ps[i];}
F0R(i,m) {cin >> b[i];}
int ans = 0;
F0R(mask,1<<m) {
chmax(ans,dp[mask]);
int sum = 0;
F0R(j,m) {
if ((1<<j)&mask) {sum += b[j];}
}
F0R(j,m) {
if (!((1<<j)&mask)) {
chmax(dp[mask|(1<<j)],dp[mask]+(sum+b[j]==ps[dp[mask]+1]));
}
}
}
cout << (ans==n ? "YES" : "NO") << '\n';
}
