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#include <iostream>
#include <vector>
#include <fstream>
#include <cstring>
#define INF 9999999
using namespace std;
int
change(vector<int>& coins, int sum)
{
int n = coins.size();
int* table = new int[sum+1];
memset(table, 0, sum);
table[0] = 0;
for (int i = 1; i < sum+1; ++i) {
table[i] = INF;
for (int j = 0; j < n; ++j) {
if (coins[j] <= i)
table[i] = min(table[i], 1+table[i-coins[j]]);
}
}
int result = table[sum];
delete[] table;
return result;
}
int
main(int argc, char** argv)
{
int ts = (argc > 1) ? stoi(argv[1]) : 100;
int s, n;
ifstream fin("input.txt");
ofstream fout("output.txt");
for (int i = 0; i < ts; ++i) {
fin >> s >> n;
vector<int> v(n);
for (int j = 0; j < n; ++j) {
fin >> v[j];
}
fout << change(v, s) << endl;
}
fin.close();
fout.close();
return 0;
}
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