//#include <bits/stdc++.h>
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <random>
using namespace std;
using ll = long long;
#define int long long
const int N = 3e5 + 7;
const int M = 1e9 + 7, MX = 1e18 + 7;
struct custom_hash { //unordered_map<long long, int, custom_hash> safe_map; gp_hash_table<long long, int, custom_hash> safe_hash_table;
static uint64_t splitmix64(uint64_t x) {
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
inline int binpow(int a, int n, int m) {
int res = 1;
while (n) {
if (n & 1) res = res * a % m;
a = a * a % m;
n >>= 1;
}
return res;
}
inline int gcd(int a, int b) {
while (b != 0) {
a = a % b;
swap(a, b);
}
return a;
}
//int f[N], invf[N];
//
//inline void factorials(int n) {
// f[0] = 1;
// for(int i = 1; i <= n; i++) {
// f[i] = (f[i - 1] * i) % M;
// }
// invf[n] = binpow(f[n], M - 2, M);
// for(int i = n - 1; i >= 0; i--) {
// invf[i] = (invf[i + 1] * (i + 1)) % M;
// }
//}
//
//inline int cnk(int n, int k) {
// if(k > n) {
// return 0;
// }
// return (((f[n] * invf[n - k]) % M) * invf[k]) % M;
//}
int dp[23][23][23][23], a[23], b[23];
inline void Solve() {
int n, m;
cin >> n >> m;
for(int i = 1; i <= n; i++) cin >> a[i];
for(int i = 1; i <= m; i++) cin >> b[i];
for(int it = 1; it <= m; it++) {
for(int i = 0; i <= n; i++) {
for(int j = 0; j <= n; j++) {
for(int jj = 0; jj <= n; jj++) {
int yes = 0;
for(int k = 1; k <= n; k++) {
dp[it][i][j][k] = dp[it - 1][j][jj][k];
if(i == k) {
dp[it][i][j][k] += b[i];
}
if(dp[it][i][j][k] == a[k]) yes++;
}
if(yes == n) {
cout << "YES\n";
return;
}
}
}
}
}
cout << "NO\n";
}
signed main() {
//freopen("bank.in", "r", stdin);
//freopen("bank.out", "w", stdout);
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int t = 1;
// cin >> t;
cout << '\n' << '\n';
while(t--) {
Solve();
}
return 0;
}
