#include <bits/stdc++.h>

using namespace std;
#define rep(i,a,b)for(int i=a;i<b;i++)
#define rrep(i,a,b)for(int i=a;i>b;i--)
#define R(a) rep(i,0,a)
#define RR(a,b) rep(i,0,a)rep(j,0,b)
#define RRR(a,b,c) RR(a,b)rep(k,0,c)
#define el '\n'
#define YN(p) cout << (p?"Yes":"No") << el;
#define SU(p) cout << p << el;
#define PU(p) cout << p.first << ' ' << p.second << el;
#define VU(p) R(p.size())cout << p[i] << (i!=p.size()-1?' ':el);
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define Toup(s) transform(all(s),s.begin(),[](char c){return toupper(c);})
#define Tolow(s) transform(all(s),s.begin(),[](char c){return tolower(c);})
#define fix() cout << fixed << setprecision(12);
using ll = long long;

const int inf = 1073041824;
const ll INFL=1LL<<60;
const ll mod= 998244353;
const ll MOD=1000000007;
bool ok=false;
const int fj[4]={0,1,0,-1};//上右下左
const int fi[4]={-1,0,1,0};

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    int T,n;
    cin >> T >> n;
    vector<int>a(n);
    R(n)cin >> a[i];
    vector<pair<int,int>>dp(1<<n,pair<int,int>(inf,0));
    auto f=[=](pair<int,int> p,int r){
        return p.second+r<=T?make_pair(p.first+(p.second+r)/T,(p.second+r)%T):make_pair(p.first+1,r);
    };
    R(1<<n){
        if(i==0){
            rep(j,0,n)dp[1<<j]={1,a[j]};
            continue;
        }
        rep(j,0,n){
            if(i&(1<<j))continue;
            dp[i|(1<<j)]=min(dp[i|(1<<j)],f(dp[i],a[j]));
        }
    }
    if(dp[(1<<n)-1].second==0)SU(dp[(1<<n)-1].first-1)
    else SU(dp[(1<<n)-1].first)
}