// https://oj.uz/problem/view/IZhO14_bank
#include<bits/stdc++.h>
using namespace std;
const int maxn = 20;
int dp[(1<<maxn)];
int ar[maxn];
int br[maxn];
int N, M;
bool ans;
int main()
{
cin >> N >> M;
for(int i = 0; i < N; i++)
{
cin >> ar[i];
}
for(int i = 0; i < M; i++)
{
cin >> br[i];
}
dp[0] = 1;
for(int mask = 0; mask < (1<<M); mask++)
{
// cout << "mask " << mask << " bool " << dp[mask] << endl;
if(!dp[mask]) continue;
int i = 0;
int s = 0;
for(int j = 0; j < M; j++)
{
if((1<<j)&mask) s += br[j];
}
for(; i < N; i++)
{
if(ar[i] <= s) s -= ar[i];
else break;
}
if(i == N)
{
ans = 1;
break;
}
for(int j = 0; j < M; j++)
{
if((1<<j)&mask) continue;
if(br[j]+s <= ar[i]) dp[mask+(1<<j)] = 1;
// cout << "j " << j << " mask+j " << mask+(1<<j) << " bool " << dp[mask+(1<<j)] << endl;
}
}
cout << (ans ? "YES" : "NO");
return 0;
}
