#include<bits/stdc++.h>
#define el '\n'
using namespace std ;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int a[25] , b[25] , n , m;
bool can = false;
void backtrack(int pos , int mask , bool check){
if (!check) return;
if (pos > n - 1){
if (check) can = true;
return;
}
for ( int sub_mask = 0 ; sub_mask < (1 << m) ; sub_mask++ ){
int sum = 0;
for ( int j = 0 ; j < m ; j++ ){
if ((mask >> j & 1) || (sub_mask >> j & 1)) continue;
sum += b[j];
}
if (sum == a[pos]) backtrack(pos + 1 , sub_mask | mask , true);
else backtrack(pos + 1 , sub_mask | mask , false);
}
}
int32_t main (){
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
for ( int i = 0 ; i < n ; i++ ) cin >> a[i];
for ( int i = 0 ; i < m ; i++ ) cin >> b[i];
backtrack(0 , 0 , true);
cout << (can ? "YES" : "NO");
}
