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

template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  Int t,n;
  cin>>t>>n;
  vector<Int> x(n);
  for(Int i=0;i<n;i++) cin>>x[i];

  Int s=1<<n;
  vector<Int> dp(s,-1),sum(s,0);
  for(Int b=0;b<s;b++)
    for(Int i=0;i<n;i++)
      if((b>>i)&1) sum[b]+=x[i];
  
  function<Int(Int)> dfs=
    [&](Int b){
      Int &res=dp[b];
      if(~res) return res;
      if(sum[b]<=t) return res=1;
      res=n+1;
      for(Int i=b;i;i=(i-1)&b){
	if(i==b) continue;
	chmin(res,dfs(i)+dfs(b^i));
      }
      return res;
    };
  
  cout<<dfs(s-1)<<endl;
  return 0;
}