#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define fi first
#define se second
#define pb push_back
#define pii pair<int, int>
#define vi vector<int>
#define ti3 tuple<int, int, int>
#define int long long
#define mp make_pair
#define ld long double
const int MOD = 1e9+7;
const int INF = 1e18;
const int mxn = 1e5+50;
inline int tot(int a, int b){return (a+b)%MOD;}
inline int sub(int a, int b){return (a+MOD-b)%MOD;}
inline int mul(int a, int b){return (a%MOD*b%MOD)%MOD;}
inline int expo(int a, int b){int res=1; while(b>0){if(b&1)res=mul(res,a); a=mul(a,a); b>>=1;} return res;}
inline int inverse(int a){a%=MOD; return expo(a,MOD-2);}
void chmx(int &a, int b){a = max(a,b);}
void chmn(int &a, int b){a = min(a,b);}
int dp[1<<20][2];
void solve(){
int n, m; cin >> n >> m;
int a[n+1], b[m+1];
for(int i = 1; i <= n; i++)cin>>a[i];
for(int i = 1; i <= m; i++)cin>>b[i];
for(int i = 0; i < (1 << m); i++){
for(int j = 0; j < 20; j++){
if(i & (1 << j) == 0) continue;
int bfr = i^(1 << j);
int need = a[dp[bfr][0]+1];
int have = b[j+1] + dp[bfr][1];
if(need > have){
dp[i][1] = need - have;
dp[i][0] = dp[bfr][0];
} else if(need == have){
dp[i][1] = 0;
dp[i][0] = dp[bfr][0] + 1;
}
if(dp[i][0] == n){
cout << "YES\n"; return;
}
}
} cout << "NO\n";
}
int32_t main(){
fastio;
int t = 1;
// cin >> t;
while(t--){
solve();
}
}
