#include <bits/stdc++.h>

#define fast ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define ll long long
#define ull unsigned long long
#define  ld long double
#define no "NO"
#define yes "YES"
#define forr(n) for(int i = 0;i < n; i++)
#define d(n) cout<<"value of "<<#n<<" is "<<n<<endl
#define endl '\n'
using namespace std;
const int N = 1e6 + 5, mode = 1e9 + 7;




void Code() {
    double n,k;
    cin >> n >> k;
    double sum=0;
    for(int i=0;i<k;i++){
        double x;
        cin >> x;
        sum+=x;
    }
    double mn = sum,mx=sum;
    mn+=-3*(n-k);
    mx+=3*(n-k);
    cout << mn/n << " " << mx/n;
}


int main() {
    fast
    int tc = 1;
//    cin >> tc;

    while (tc--)
        Code();
}