#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <functional>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <utility>
#include <sstream>
#include <complex>

using namespace std;

#define FOR(i,a,b) for(long long i=(a);i<(b);i++)
#define REP(i,N) for(long long i=0;i<(N);i++)
#define ALL(s) (s).begin(),(s).end()
#define fi first
#define se second

#define PI acos(-1.0)
#define INF 1000000007
#define EPS 1e-10

typedef long long ll;
typedef pair<ll, ll> P;
typedef pair<double, double> PD;
typedef pair<string, ll> PS;
typedef vector<ll> V;
typedef pair<P, char> PC;

ll  n, m, a;
vector<ll> num;

int main(){
	while (cin >> m >> n&&n + m){
		num.clear();
		vector<ll> h(m);
		REP(i, n){
			cin >> a;
			num.push_back(a);
		}
		sort(ALL(num));
		REP(i, n){
			h[0] += num[i];
			sort(ALL(h));
		}
		cout << h[m - 1] << endl;
	}
}