//https://oj.uz/problem/view/IZhO14_bank
#include <bits/stdc++.h>
using namespace std;
int main() {
cin.tie(0) -> sync_with_stdio(0);
int N, M; cin >> N >> M;
vector<int> salaries(N);
vector<int> notes(M);
for (int i = 0; i < N; i++) {
cin >> salaries[i];
}
for (int i = 0; i < M; i++) {
cin >> notes[i];
}
vector<array<int, 2>> dp(1 << M, {-1, 0});
for (int mask = 0; mask < 1 << M; mask++) {
auto [pf, sum] = dp[mask];
for (int b = 0; b < M; b++) {
if (mask & 1 << b) { continue; }
if (dp[mask][0] == N - 1) { dp[mask | 1 << b][0] = N - 1; continue; }
int pfb = pf, sumb = sum + notes[b];
if (sumb == salaries[pfb + 1]) { pfb++; sumb = 0; }
if (dp[mask | 1 << b][0] <= pfb) { dp[mask | 1 << b] = {pfb, sumb}; }
}
}
cout << (dp[(1 << M) - 1][0] == N - 1 ? "YES" : "NO") << "\n";
}
