A_Business_trip.cpp

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

typedef long long int ll;
typedef long double ld;
typedef string str;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<pair<ll, ll>> vpl;
typedef set<ll> sll;
typedef map<ll, ll> mll;
typedef pair<int, int> pint;
typedef pair<ll, ll> pll;
double pi = acos(-1.0);
#define debug(x) cerr << #x < < < < x << endl;
#define loop for (ll i = 1; i <= n; i++)
#define all(a) (a).begin(), (a).end()
#define min3(a, b, c) min(a, min(b, c))
#define max3(a, b, c) max(a, max(b, c))
#define min4(a, b, c, d) min(a, min(b, min(c, d)));
#define max4(a, b, c, d) max(a, max(b, max(c, d)));

int main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int k;
    cin >> k;
    vll v;
    for (int i = 1; i <= 12; i++)
    {
        ll x;
        cin >> x;
        v.push_back(x);
    }
    sort(v.rbegin(), v.rend());
    ll sum = 0, ans = 0;
    for (auto it : v)
    {
        if (sum >= k)
        {
            cout << ans;
            return 0;
        }
        sum += it;
        ans++;
    }
    if(sum>=k){
        cout<<ans<<endl;
    }
    else cout << -1;

    return 0;
}