#include<bits/stdc++.h>

using namespace std;

#define x first
#define y second
#define pb push_back
#define eb emplace_back
#define rep(i,a,b) for(auto i = (a); i != (b); ++i)
#define REP(i,n) rep(i,0,n)
#define all(v) (v).begin(), (v).end()

template<class T> using min_queue = priority_queue<T, vector<T>, greater<T>>;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii;

const int maxn = 5e5;

int N, M, X[maxn], L[maxn];

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	cin >> N >> M;
	REP(i, N) cin >> X[i];
	REP(i, M) cin >> L[i];

	for (int i = N - 1; i > 0; i--) X[i] -= X[i - 1];
	X[0] = 0;

	sort(L, L + M);

	// match greedily
	min_queue<ii> q;
	for (int i = 0, j = 1, s = 0; j < N; s -= X[++i]) {
		while (j < N && s < L[0]) s += X[j++];
		q.emplace(s, j);
	}

	int ptr = 0;
	while (!q.empty() && ptr < M) {
		ii cur = q.top(); q.pop();
		if (cur.y < N) {
			// add the next one.
			q.emplace(cur.x + X[cur.y], cur.y + 1);
		}

		if (L[ptr] >= cur.x) {
			// we got a match!
			ptr++;
		} else break;
	}

	if (ptr == M) cout << "yes" << endl;
	else cout << "no" << endl;

	return 0;
}