#include <bits/stdc++.h>
using namespace std;

using vi = vector<int>;

bool remove(map<int, int> &m, int x) {
	auto it = m.lower_bound(x);
	if (it == m.end()) return false;
	it->second--;
	if (it->second == 0)
		m.erase(it);
	return true;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int n, m;
	cin >> n >> m;
	vi X(n);
	map<int, int> L;
	for (int &x : X) cin >> x;
	for (int i = 0, l; i < m; ++i)
		cin >> l, L[l]++;

	for (int i = 0; i < n; ++i)
		for (int j = i+1; j < n; ++j)
			if (!remove(L, X[j] - X[i]))
				break;

	cout << (L.empty() ? "yes" : "no") << endl;
}