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

int main(){
	int n, m; cin >> n >> m;
	vector<int> a(m);
	for(auto&& i : a) cin >> i;
	int sum = 0;
	for(auto i : a) sum += i;
	if(n - sum >= 0)
		cout << "yes";
	else
		cout << "no\n" << sum - n;
	return 0;
}