#include <set> #include <map> #include <list> #include <queue> #include <stack> #include <cmath> #include <ctype.h> #include <ctime> #include <cstdio> #include <vector> #include <string> #include <bitset> #include <cctype> #include <cstdlib> #include <cstring> #include <utility> #include <numeric> #include <complex> #include <sstream> #include <fstream> #include <iomanip> #include <cassert> #include <iostream> #include <iterator> #include <algorithm> #define B 2 #define G 1 #define W 0 #define ALL(g) (g).begin(),(g).end() #define REP(i, x, n) for(int i = x; i < n; i++) #define rep(i,n) REP(i,0,n) #define F(i,j,k) fill(i[0],i[0]+j*j,k) #define P(p) cout<<(p)<<endl; #define EXIST(s,e) ((s).find(e)!=(s).end()) #define INF 1<<25 #define MAX 100000000 #define pb push_back using namespace std; typedef vector<int> vi; typedef vector<long long> vl; typedef vector<double> vd; typedef pair<int,int> pii; typedef pair<long,long> pll; typedef long long ll; int dx[] = {0,1,0,-1}; int dy[] = {-1,0,1,0}; int main(){ int l,n; cin >> l >> n; vector<int> b; for(int i = 0;i < n;i++){ int x; cin >> x; b.push_back(x); } sort(b.begin(),b.end()); int count = 0; int i = 0; int box = 0; while(1){ count += b[i]; if(count > l){ break; }else if(count == l){ box++; break; } box++; i++; } P(box); return 0; }